US20070225760A1 - Occlusion Device and Method for its Manufacture - Google Patents
Occlusion Device and Method for its Manufacture Download PDFInfo
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- US20070225760A1 US20070225760A1 US11/689,550 US68955007A US2007225760A1 US 20070225760 A1 US20070225760 A1 US 20070225760A1 US 68955007 A US68955007 A US 68955007A US 2007225760 A1 US2007225760 A1 US 2007225760A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12122—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder within the heart
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- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12168—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure
- A61B17/12172—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure having a pre-set deployed three-dimensional shape
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/06—Braid or lace serving particular purposes
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
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- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
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- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
- A61B2017/00592—Elastic or resilient implements
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- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
- A61B2017/00606—Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
- A61B2017/00615—Implements with an occluder on one side of the opening and holding means therefor on the other
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- A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
- A61B2017/00623—Introducing or retrieving devices therefor
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- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/08—Hernia repair mesh
Definitions
- the present invention relates to an occlusion device consisting of a holder and a braiding of thin wires or threads given a suitable form by means of a molding and heat treatment procedure, whereby the occlusion device has a proximal retention area and a distal retention area, wherein the ends of the wires converge into a holder in the distal retention area, and a cylindrical crosspiece interposed between the proximal and distal retention areas, whereby the two retention areas are positioned on the two sides of a shunt to be occluded in a septum, usually by way of an intravascular surgical procedure, while the crosspiece transverses the shunt.
- the invention moreover relates to a method for manufacturing said occlusion device.
- a self-expanding umbrella system is introduced transvenously into a defect to be occluded in a septum.
- This type of system might comprise two umbrellas; one positioned at the distal side of the septum, for example (i.e. the side farthest from the median plane of the body/heart), and one at the proximal side of the septum (i.e. the side closer to the median plane of the body), whereby the two umbrella prostheses are subsequently fitted into a double umbrella in the septal defect.
- the occlusion system usually consists of two fixed umbrellas connected to one another by means of a short peg which passes through the defect.
- self-centering occlusion devices have been developed which are inserted into the body of the patient and introduced into the septal defect to be occluded by way of a minimally-invasive procedure, for example using a catheter and guide wires.
- Their design is based on the principle that the occlusion device can be tapered to the dimensions of the insertion instrument and/or catheter used for the intravascular surgical procedure.
- Such a tapered occlusion device is then introduced by catheter into the septal defect to be occluded, respectively into the shunt of the septum defect to be occluded.
- the occluder is then discharged from the catheter, upon which the self-expanding umbrellas, retention discs respectively, subsequently unfold against the two sides of the septum.
- the umbrellas in turn comprise fabric inserts made from or covered by, for example, Dacron, with which the defect/shunt is occluded. After a few weeks or months, the body's own tissue more or less completely envelops the implants remaining in the body.
- FIG. 15 a shows a tubular braiding known from the prior art, for example said US printed U.S. Pat. No. 5,725,552, as the base structure or starting body for manufacturing this type of known occlusion device, whereby each end of the tubular braiding needs to be held in a respective holder.
- FIG. 15 a shows a tubular braiding known from the prior art, for example said US printed U.S. Pat. No. 5,725,552, as the base structure or starting body for manufacturing this type of known occlusion device, whereby each end of the tubular braiding needs to be held in a respective holder.
- FIG. 15 b depicts a side sectional view of the right side of a known PFO-type occlusion device from the prior art, for example said US printed U.S. Pat. No. 5,725,552, with the occlusion device being made from a tubular braiding in accordance with FIG. 15 a
- FIG. 15 c shows a right-side sectional view of a further ASD-type occlusion device likewise known from US printed U.S. Pat. No. 5,725,552, with this occlusion device also being made from a tubular braiding in accordance with FIG. 15 a.
- PFO-type is an occlusion device for treating a patent foramen ovale (PFO) while the term “ASD-type occlusion device” refers to an occlusion device for treating atrial septal defects.
- the known occlusion devices consist of a braiding of a plurality of fine, intertwined nitinol wire strands in the shape of a yo-yo.
- Each braiding is manufactured in its initial form as a rounded braiding having loose wire ends both at its leading end (its proximal side, respectively) as well as at its trailing end (its distal side, respectively).
- these loose ends must then be gathered into a collar and welded together.
- both the proximal side as well as the distal side of the finished occluder exhibit a protruding collar.
- Dacron patches are sewn into the distal and proximal retention umbrellas and the interposed crosspiece.
- the two retention umbrellas unfold by themselves upon exiting the catheter, initially in a balloon-like intermediate stage, whereby the retention umbrellas ultimately positioned on the two sides of the septum eventually assume a more or less flattened form.
- the crosspiece centers itself automatically into the shunt to be occluded as the umbrellas expand.
- the collar protrudes past the proximal retention area of the occluder, the problem arises that the inserted implant causes embolic-related problems, in particular consecutive embolization. Because portions of the occlusion device protrude past the septum wall and are in continuous contact with the blood, defense system reactions are also a frequent occurrence. Furthermore, a complete endothelialization of the occluder implant is often prevented.
- An occlusion device of the type indicated at the outset as well as a method for manufacturing such an occlusion device is additionally known from WO 2005/020822 A1.
- the occlusion device described therein essentially consists of a braiding of thin wires or threads made from a material having shape-memory function.
- the known occlusion device In the expanded state, the known occlusion device exhibits a proximal and a distal retention area as well as a cylindrical crosspiece interposed between the two.
- proximal retention area of the braiding exhibits a form which is open to the proximal end in this prior art, it basically allows the rim of the proximal retention area to lie flat against the septal wall when the occlusion device is in the inserted state while the retention area does not protrude beyond the septal wall.
- the manufacturing process according to WO 2005/020822 A1 utilizes a braiding technique which forms a tubular braiding open to the top, which need only be provided with a holder for bundling the braiding's threads or wires on one end, while at the opposite end, the braiding's threads or wires are intertwined from their center. It thus becomes possible to produce a braiding to serve as the base structure for the known occlusion device, whereby the proximal retention area of the base structure exhibits a form open to the proximal end.
- FIG. 16 a shows a tulip or bell-shaped braiding having a distal holder known, for example, from WO 2005/020822 A1.
- FIG. 16 b depicts a sectional view of the right side of a PFO-type occlusion device known from WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance with FIG. 16 a .
- FIG. 16 c finally shows another sectional view of the right side of an ASD-type occlusion device known from WO 2005/020822 A1, with the occlusion device likewise being made from a tubular braiding in accordance with FIG. 16 a.
- thromboembolic complications need to be considered with the occlusion devices known from WO 2005/020822 A1. While the known system enables the rim of the proximal retention area to lie flat against the septal wall and not have the retention area project beyond the septal wall when the occlusion device is in the inserted state, the proximal end of the known occlusion device nevertheless exhibits a manufacturing-contingent opening at the proximal wall axial to the crosspiece.
- the known system cannot prevent the finished occlusion device from having at least one remaining trough-shaped recess or sometimes even components protruding in the proximal retention area of the occluder, these being at the very location where the opening closed with the Dacron insert is disposed.
- embolic-related problems arise especially when the patient is suffering from so-called atrial fibrillation of the heart. This is a condition in which frequent excitation of the heart's upper chambers results in their not contracting. As a consequence of the left and right halves of the heart being deprived of contraction, the blood is ineffectively swirled and mixed and thrombi can form in the atrium. A considerable risk when atrial fibrillation causes thrombi to form in the atrium is that these thrombi can be carried along in the bloodstream and enter the arterial circulation.
- dicumerol a blood anticoagulant
- anticoagulating the blood with so-called dicumerol is also not without risks.
- One side effect of dicumerol treatment is increased bleeding such that there are contraindications for this treatment for approximately 20% of all atrial fibrillation patients and the patients thus have to hazard the risk of a stroke when weighing the bleeding/stroke risk.
- the present invention therefore addresses the problem of refining such an occlusion device as known to medical technology and described in WO 2005/020822 A1 so as to overcome the disadvantages cited above.
- a particular objective is the providing of an occlusion device applicable to occluding defects of different sizes, whereby implantation of the occluder is to be a simple procedure. Furthermore, the occurrence of such usual occluder complications such as dislocation, partial embolization or occluder material fatigue is to be reduced to the greatest extent possible.
- an occlusion device is to be provided which ensures occlusion of a septal defect with as few portions of the occlusion device as possible protruding past the septum wall so as to avoid the associated and above-cited complications.
- the task of the present invention is the task of the present invention to provide an occlusion device which lies as flat as possible against the septum in the inserted state at the proximal side of the septal defect, and with which the risk of material fatigue with fragment fracture is considerably reduced, and to do so at a lower manufacturing cost.
- the present invention moreover has the technical task of providing a method for manufacturing such an occlusion device.
- an occlusion device of the type specified at the outset having the proximal retention area of the braiding exhibit a completely closed proximal wall at the proximal end of the occlusion device with a continuous surface forming the proximal end of the occlusion device.
- the problem of process-engineering the present invention is furthermore solved by a method for manufacturing the above-cited occlusion device which is characterized by the process step of forming a ball-shaped, bulb-shaped or teardrop-shaped hollow braiding by means of a braiding process known per se and by the process step of forming a proximal retention area and a distal retention area at the bundled first end, and interposing a cylindrical crosspiece between said proximal and distal retention areas. It is thereby provided for the hollow braiding to be bundled at a first distal end and to exhibit a completely closed proximal wall having a continuous surface on an opposite second proximal end.
- proximal wall is that segment or region of the proximal retention area of the braiding at the proximal end of the occlusion device which forms the closure for the defect to be occluded on the proximal end.
- the particular advantages of the invention lie in providing an intravascular occlusion device, especially for the treatment of septal defects, whereby the occluding device is suited to be administered by catheter to the defect to be occluded. Because the proximal retention area of the braiding has a fully closed proximal wall at the proximal end which exhibits a continuous surface forming the proximal end of the occlusion device, a particular advantage afforded by the occlusion device—independent of the diameter size to the defect to be occluded and independent of the septal wall's thickness—is in its self-adjusting to the defect in the septal wall and doing so specifically that no portion of the occlusion device protrudes into the plane of the septal wall having the defect on the proximal side of the defect.
- this plane i.e., the plane of the septal wall with the defect
- this proximal wall will contain no recesses or other “discontinuities” in the mathematical sense such as sharp edges, kinks, etc. whatsoever, so that the usual associated complications, in particular as regards embolic-related problems, can no longer occur.
- the inserted occlusion device will be fully enveloped by the body's own tissue substantially faster than is the case with the occluding systems known in the prior art.
- the further advantage of better mechanical stability over the long term compared to the systems known in the prior art is a function derived from using a braiding made of thin wires or threads as the starting material for the inventive occlusion device. This largely prevents fractures from occurring in the structure of the inserted implant.
- the braiding furthermore has a better rigidity since the entire structure is made from one material and without any connecting joints.
- the fully closed proximal wall provided at the proximal retention area of the braiding additionally allows the proximal retention area of the device to flatten completely against the lateral edge of the defect in the inserted state and to specifically do so virtually independently of the diameter to the defect or the thickness of the septal wall.
- the occlusion device can be used for a wide range of differently-sized septal defects. Because there is then no need for a holder for the bundled or gathered braiding at the proximal retention area, there are also no components of the occlusion device to protrude beyond the septal wall which prevents the components of the implant from being in continuous contact with the blood. This yields the advantage of there being no threat of the body mounting any defense mechanism reactions or of there being any thromboembolic complications.
- a ball-shaped, bulb-shaped or teardrop-shaped hollow braiding is formed, for example using a round braiding machine.
- the technology used here is one in which the configured braiding is bundled at the trailing end of the length of the braiding; i.e., at what will later be the distal end of the occlusion device, while the leading end of the length of the braiding; i.e., what will later be the proximal end of the occlusion device, is closed.
- a “bag-shaped” hollow braiding the bundled end of which corresponds to the distal end of the finished occlusion device and its opposite closed end the proximal end or the proximal wall of the finished occlusion device. Because a known braiding method is used to produce the occlusion device, the finished occlusion device exhibits mechanical properties in terms of, for example, expansion, stability, strength, etc., which can be custom-adapted to the later use of the occlusion device. In advantageous manner, metallic wires or even organic threads can be incorporated into the braiding.
- ball-shaped “bulb-shaped,” “teardrop-shaped” and “bag-shaped” are to respectively refer to forms which have shapes comparable to a ball, a bulb, a teardrop or a bag.
- the invention is in particular not limited solely to an exact spherical shape, etc.
- the proximal wall of the occlusion device it is particularly preferred for the proximal wall of the occlusion device to exhibit a curved surface as the continuous surface. It is hereby essential that the curvature to this surface have no discontinuities such as, for example, edges, corners, etc. With respect to the term “continuity” as used herein, this refers to the mathematical definition of a continuous surface as known in the field of topology. For example, it would be conceivable for the proximal wall to exhibit a curved surface which in respect to the plane of the septal wall with the defect, has a preferably slightly concave curve so as to ensure a particularly good, i.e. flat and even fitting of the proximal wall against the septal wall.
- the surface of the proximal wall be preferably configured to be slightly convex relative the septal wall, this thereby achieving that the force-fit connection between the proximal wall, the peripheral area of the proximal wall respectively, and the septal wall at the defect to be occluded is particularly large so as to thus enable a better anchorage for the occlusion device in the defect to be occluded.
- the outer region of the proximal wall to be formed with a slight concave which transitions into a convex form toward the middle; i.e. toward the position axial to the crosspiece of the occlusion device. This can also yield advantages, especially as regards anchoring the occlusion device in the defect to be occluded.
- the proximal wall of the occlusion device exhibits a curved surface as the continuous surface provides for the curved surface to conform to the surface of a section of a ball-shaped, bulb-shaped or teardrop-like body.
- the proximal wall of the occlusion device can be configured in the shape of a spherical cap or a segment of a teardrop, for example.
- other profiles are just as conceivable here.
- the inventive solution basically allows for the optimum use of an occlusion device independent of the type and in particular of the size of the defect to be occluded.
- the occlusion device prefferably has the braiding consist of nitinol or of another shape-memory material or material having memory effect.
- Such other material could conceivably be, for example, copper-zinc-aluminum alloys, gold-cadmium alloys or even ferrous alloys such as e.g. iron-manganese-silicon alloys, or also plastics, all of which are characterized by their extremely high memory capacity.
- the braiding of the inventive occlusion device is particularly preferably provided for the braiding of the inventive occlusion device to be formed from a shape-memory polymer based on, for example, a polyanhydride matrix or on a polyhydroxycarboxylic acid.
- a shape-memory polymer based on, for example, a polyanhydride matrix or on a polyhydroxycarboxylic acid.
- These are synthetic degradable materials which have a thermally-induced shape-memory effect.
- shape-memory polymers such as, for example, block copolymers as described for example in the special edition of Angewandte Chemie 1 2002, 114, pages 2138 to 2162, by A. Lendlein and S. Kelch. 1 “Applied Chemistry”
- biodegradable implant material is particularly suitable.
- degradable materials or polymers contain cleavable bonds under physiological conditions.
- Biodegradableness refers to material degraded by or in a biological system based on loss of mechanical property. Under certain conditions, the outer shape as well as the dimensions of the implant are preserved during this degradation. If one speaks of a degradation time without adding any additional quantifying information, this refers to the time it takes for the complete loss of the mechanical property.
- Biostable materials refer to those which remain stable in biological systems and at least partly degrade in same over the long term.
- hydrolytic degradation has the advantage that the rate of degradation is independent of the implantation site since water is present everywhere. In contrast, local enzyme concentrations differ greatly. With biodegradable polymers or materials, degradation thus ensues from pure hydrolysis, enzymatically-induced reactions or through a combination of the two. Typical hydrolyzable chemical bonds are amide, esterase or acetal bonds. When degrading, two mechanisms can be observed. With surface degradation, the hydrolysis of chemical bonds occurs solely on the surface. Due to its hydrophobic nature, polymer degradation occurs faster than the water diffusion inside the material.
- the invention claims all the afore-mentioned biodegradable shape-memory polymers.
- the inventive occlusion device prefferably has the braiding of the occlusion device taper to the diameter of a catheter to be used in the minimally-invasive surgical procedure.
- the advantage to this embodiment is in particular to be seen in that the catheter system used for implantation and explantation can have a considerably reduced inner diameter, which above all significantly increases maneuverability of the occlusion device to be implanted. This thus improves the accuracy when positioning the device in the defect to be occluded.
- the inner diameter of the catheter to be used during implantation or explantation ranges between 8 to 10 Frenches, whereas in the case of occlusion devices made from polymer synthetics, the inner diameter only need be between 6 and 8 Frenches.
- proximal retention area of the occlusion device with its proximal wall to be configured such that the proximal wall curves outward upon the occlusion device expanding so as to come into position in such manner with the septal wall. This reflects a particularly simple to realize and thereby effective way to form the proximal wall in the occlusion device.
- the entire occlusion device as one single piece of braiding so that no mechanical connecting elements are needed between the proximal wall and the crosspiece on the one hand and, on the other, the dimensions of the occlusion device in the folded state can be further minimized.
- other embodiments for forming the proximal wall at the proximal retention area are just as conceivable here.
- the inventive occlusion device provides for the distal retention area to exhibit a holder, preferably arranged axially to the crosspiece, whereby the holder has at least one connecting element engageable with a catheter.
- this connecting element which is preferably arranged on the distal end of the occlusion device such that it does not project over the distal end of the septal wall, preventing the components of the implant from being in continuous contact with the blood, explanting the occlusion device according to this further development becomes a simple process.
- a connecting element which can engage with a catheter meanwhile facilitates the implanting and positioning of the occlusion device (folded during the implantation procedure) in the septal defect to be occluded.
- connecting elements such as engaging members, for example, or even hooks and/or eyelets which can be force-fit to the corresponding complementary-configured connecting elements of a catheter.
- the occlusion device to be configured to be reversibly foldable and expandable so that the device in its expanded state can be folded back up again, for example with the aid of an explantation catheter, whereby the force-fit connection between the proximal wall formed at the proximal retention area, the peripheral area of the proximal wall respectively, and the septal wall can be disengaged. It is thereby conceivable during explantation for a catheter to engage with a connecting element at the distal end of the occlusion device for example, with the folding of the occlusion device being effected by external manipulation aided by the catheter. The occlusion device is thus completely reversibly retractable in the catheter, which enables the complete removal of the device.
- the method according to the invention affords the prospect of realizing a particularly simple manufacturing of the occlusion device described above.
- a ball-shaped or bag-shaped hollow braiding is formed, using for example a round braiding machine as has already been described in the WO 2005/020822 A1 patent application.
- a special braiding head is necessary to do so, which will be described in greater detail below with reference to the figures.
- the technology used in particular here is one in which the configured braiding is bundled at the trailing end of the length of the braiding; i.e., at what will later be the distal end of the occlusion device, while the leading end of the length of the braiding; i.e., what will later be the proximal end of the occlusion device, is closed. It is thereby possible to produce a spherical or bag-like hollow braiding, the bundled end of which corresponds to the distal end of the finished occlusion device and the opposite closed end to the proximal end of the finished occlusion device.
- the finished occlusion device exhibits mechanical properties in terms of, for example, expansion, stability, strength, etc., which can be custom-adapted to the later use of the occlusion device.
- metallic wires or even organic threads can be incorporated into the braiding.
- the process step of forming the retention area and the crosspiece prefferably provided for the process step of forming the retention area and the crosspiece to include a procedural molding and heat treatment step.
- a procedural molding and heat treatment step is preferably provided for the process step of forming the retention area and the crosspiece.
- the inventive occlusion device is forming the braiding from a shape-memory polymer which is based on a polyanhydride matrix or a polyhydroxy-carboxylic acid, for example.
- shape-memory polymers which is based on a polyanhydride matrix or a polyhydroxy-carboxylic acid, for example.
- These are synthetic degradable materials which have a thermally-induced shape-memory effect.
- shape-memory polymers such as for example block copolymers would also be conceivable.
- a finished occluder can then be tapered to the dimensions of a catheter, for example. After exiting the catheter, the occlusion device then unfolds by itself and again assumes that profile to the ball-shaped hollow braiding to which the occlusion device was molded during the manufacturing process in the molding and heat treatment step.
- the ball-shaped hollow braiding prefferably be manufactured in such a manner that the thin threads or wires constituting the finished braiding intertwine at the proximal end of said braiding when the ball-shaped hollow braiding is formed.
- other manufacturing methods are naturally also conceivable.
- FIG. 1 a perspective view of a preferred first embodiment of an occlusion device according to the present invention in expanded state in which only the outlined contour of the occlusion device is depicted;
- FIG. 2 a perspective detail view of the distal retention area of the first embodiment of the FIG. 1 occlusion device in the expanded state;
- FIG. 3 a side view of the inventive occlusion device shown in FIG. 2 in the expanded state
- FIG. 4 a three-dimensional view of a round braiding machine to illustrate the inventive manufacturing method for the occlusion device
- FIG. 5 a top plan view onto the round braiding machine depicted in FIG. 4 to illustrate the inventive manufacturing method for a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c , which can serve as a base structure for the occlusion device according to the present invention;
- FIG. 6 a detail view of the braiding head of the round braiding machine depicted in FIG. 4 ;
- FIG. 7 an example of a braiding produced with the braiding head shown in FIG. 6 , which can serve as the base structure for the occlusion device according to the present invention
- FIG. 8 a a side view of a special braiding head for manufacturing a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c , which can serve as the base structure for the occlusion device according to the present invention
- FIG. 8 b a sectional view of the braiding head according to FIG. 8 a;
- FIG. 8 c a stereoscopic representation of the special braiding head used to produce a spherical braiding
- FIG. 9 a a perspective representation of a base body for a spherical braiding constituting the initial body for the inventive occlusion device, whereby the base body is configured in a form as close to a ball as possible;
- FIG. 9 b a perspective representation of a base body for a spherical braiding suited for producing the occlusion device according to the present invention and whereby the base body is configured to the greatest extent possible in the form of a bulb-shaped body;
- FIG. 9 c a perspective representation of a base body for a spherical braiding, whereby the base body is suited for producing the occlusion device according to the present invention and whereby the base body is configured in a teardrop-shaped form;
- FIG. 10 a a spherical braiding as a base body for different occlusion devices in accordance with the present invention which is produced with a special braiding method and which exhibits a distal holder;
- FIG. 10 b a sectional side view of the right side of an inventive PFO-type occlusion device, whereby the occlusion device is made from a spherical braiding in accordance with FIG. 9 a;
- FIG. 10 c a sectional side view of the right side of an inventive ASD-type occlusion device, whereby the occlusion device is made from a spherical braiding in accordance with FIG. 9 a;
- FIG. 11 a sectional side view of the right side of an inventive PFO-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c and comprises a distal holder;
- FIG. 12 a sectional side view of the right side of an inventive VSD-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c and comprises a distal holder;
- FIG. 13 a sectional side view of the right side of an inventive ASD-type occlusion device according to the invention, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c and comprises a distal holder;
- FIG. 14 a sectional side view of the right side of an inventive PDA-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance with FIGS. 9 a - 9 c and comprises a distal holder;
- FIG. 15 a a tubular braiding known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, constituting the starting structure or base for manufacturing a known occlusion device, whereby the respective ends of the tubular braiding need to be held in a holder;
- FIG. 15 b a sectional side view of the right side of a PFO-type occlusion device known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, whereby the occlusion device is made from a tubular braiding in accordance with FIG. 15 a;
- FIG. 15 c a sectional side view of the right side of an ASD-type occlusion device known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, whereby the occlusion device is made from a tubular braiding in accordance with FIG. 15 a;
- FIG. 16 a a tulip-shaped or bell-shaped braiding having a distal holder as known from the prior art, for example from WO 2005/020822 A1;
- FIG. 16 b a sectional side view of the right side of a PFO-type occlusion device known from the prior art, for example in accordance with WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance with FIG. 16 a ;
- FIG. 16 c a sectional side view of the right side of an ASD-type occlusion device known from the prior art, for example in accordance with WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance with FIG. 16 a.
- FIG. 1 shows a perspective view of a preferred first embodiment of the occlusion device 1 according to the invention in the expanded state, whereby only the outlined contour of occlusion device 1 is depicted in FIG. 1 .
- FIG. 2 shows a perspective detail view of the distal retention area 8 of the first embodiment of the occlusion device 1 shown in the expanded state in FIG. 1 .
- FIG. 3 shows a side view of the inventive occlusion device 1 shown in expanded state in FIG. 2 .
- the occlusion device 1 essentially consists of a braiding 2 of thin wires or threads 4 , preferable made from nitinol or another shape-memory material or material having memory effect.
- the braiding 2 exhibits sufficient flexibility such that the occlusion device 1 can be tapered to the diameter of a (not explicitly shown) catheter used in an intravascular surgical procedure. Because of the material's memory effect, the occlusion device 1 tapered as such has a shape-memory function such that the device 1 self-expands after exiting the catheter and reassumes the predefined form which corresponds to its use. This normally ensues after the occlusive device 1 initially disposed in the catheter has been positioned at the location to be treated.
- the occlusion device 1 exhibits a proximal retention area 6 , a distal retention area 8 and a cylindrical crosspiece 10 arranged between said proximal and distal retention areas 6 , 8 in the expanded state.
- the two retention areas 6 , 8 serve to occlude a defect or shunt in a septum. This ensues by areas 6 , 8 positioning against the two sides of the shunt to be occluded while the crosspiece 10 passes through the shunt.
- the occlusion device 1 therefore represents an occluding system which can be introduced into a patient's body and positioned at its intended location in a minimally-invasive procedure; i.e., using a catheter and guide wires, for example.
- the design to the inventive occlusion device 1 is thereby based on the principle of having the occlusion device 1 taper to the dimensions of the catheter. After being discharged from the catheter, the retention areas 6 , 8 then unfold by themselves, thereby positioning themselves on both sides of the septum.
- the inventive design moreover reflects the occlusion device 1 being a self-positioning and self-centering system.
- the crosspiece 10 thereby has the length of the atrial diaphragm, the septum respectively, in order to ensure secure placement of retention areas 6 , 8 at the septum wall.
- the proximal retention area 6 of the present invention has a flat covering in the form of a proximal wall 112 closed to the proximal end 12 such that no material of the implanted occlusion device 1 whatsoever can extend past the septum wall in the proximal area of the patient's organ.
- the closed contouring to the proximal end 12 of proximal retention area 6 further ensures that the rim of proximal retention area 6 will always lie flush with the septum wall.
- the occlusion device 1 Because of the self-expanding property to implant 1 based on the memory effect of the material used, the occlusion device 1 according to the invention exhibits a self-centering function in the shunt or the septal defect. The occlusion device 1 can furthermore be retracted at any time up to the uncoupling of the guide wires of the insertion instrument.
- the occlusion device 1 can of course furthermore comprise fabric inserts, which are not explicitly shown in the present drawings, the principle behind which is known from the prior art.
- fabric inserts consist mostly of Dacron material. Chemically speaking, Dacron is a polyethylene terephthalate polyester, obtained by polycondensating ethylene glycol and terephthalic acid—dimethyl ester. It is hereby conceivable to incorporate the fabric inserts within the interior of crosspiece 10 or at the proximal end 12 of retention area 6 in order to be able to fully occlude the defect or the shunt in the septum wall.
- the fabric inserts can be incorporated by bracing same within occlusion device 1 , for example.
- the implant 1 inserted into the body will then be completely enveloped by the body's own tissue within a few weeks or months.
- the braiding 2 which serves as the base structure for the occlusion device 1 according to the invention exhibits sufficient rigidity to clamp the fabric insert and have it remain in position.
- the braiding 2 converges into a holder 5 at the distal end 3 of distal retention area 8 .
- This is thereby realized by producing an internal thread in holder 5 which then serves to engage with a guide wire of a not shown insertion instrument when the occlusion device 1 is being guided to the appropriate position relative the location of the defect in the septum, for example in an intravascular surgical procedure.
- the engagement between the guide wire of the insertion instrument and distal end 3 is then disengaged. It is, of course, also conceivable to make use of a differently-configured mechanism in place of an internal thread in holder 5 at distal end 3 .
- FIG. 1 shows a perspective view of the preferred first embodiment of the occlusion device 1 according to the invention in expanded state while FIG. 2 shows a perspective partial view of the distal retention area 8 of the occlusion device 1 shown in FIG. 1 .
- FIG. 1 only shows the outline of occlusion device 1 .
- a detailed depiction of the braiding 2 serving as the base structure is dispensed with and the form of occlusion device 1 is shown as that of a closed surface.
- This occlusion device 1 exhibits a much flatter proximal retention area 6 compared to the first embodiment.
- the proximal retention area 6 is configured in a more or less distinctly flattened shape so as to ultimately form the proximal wall 112 in the expanded state. Yet also conceivable would be for the proximal wall 112 to exhibit a completely flattened spherical shape or an almost plate-shaped profile.
- FIG. 4 shows a three-dimensional view of a round braiding machine 7 in order to illustrate the method of manufacturing the occlusion device 1 according to the present invention.
- FIG. 5 is a top plan view of the round braiding machine 7 depicted in FIG. 4 in order to illustrate the inventive manufacturing method for a ball-shaped, bulb-shaped or teardrop-shaped initial braiding structure 2 according to FIGS. 9 a - 9 c , which can serve as the starting structure for the occlusion device 1 according to the invention.
- FIG. 6 further shows a braiding head 11 for the round braiding machine 7 of FIG. 4 in greater detail, while FIG. 7 shows a braiding 2 made for example with the braiding head 11 shown in FIG.
- FIG. 8 a is furthermore a side view of a special braiding head 11 for manufacturing a ball-shaped, bulb-shaped or teardrop-shaped initial braiding 2 according to FIGS. 9 a - 9 c , which likewise can serve as the base structure for the inventive occlusion device 1 .
- the braiding head 11 according to FIG. 8 a is further shown in sectional view in FIG. 8 b
- FIG. 8 c depicts a stereoscopic representation of the special braiding head 11 for manufacturing a spherical braiding of this type.
- the material supply is stretched from every second spool 9 to a braiding head 11 and from there to each next respective spool 13 or a multiple of the dividing gap.
- the spools 13 not having a material supply only have an auxiliary thread extending at least to braiding head 11 .
- the end of the material supply is connected to the end of the auxiliary thread as close as possible to the auxiliary thread spool by means of bolt 14 .
- the braiding head 11 is of crown-shaped configuration and is provided with form elements 15 which allow the threads or wires 4 to be hooked. Form elements 15 can be lowered in order to hook/unhook braiding 2 .
- Braiding head 11 is axially positioned at the center of the orbit of impellers 16 such that the threads or wires 4 are aligned at a flat downward angle to bobbins 17 of the braiding machine 7 .
- braiding commences in conventionally known manner in that impellers 16 rotate around the center while bobbins 17 shift from impeller to impeller, their orbits thereby crossing.
- the infeed for braiding 2 is realized by means of a cam plate 18 based on the revolutions of impellers 16 .
- the length to the braiding which can be produced with this method is proportional to the circumference and pitch of braiding 2 as well as to the length of the end of the wire or thread connected to the auxiliary thread.
- the free ends are bundled or gathered, lopped off from the material supply and uncoupled from the auxiliary thread.
- the ball-shaped or bag-like hollow braiding 2 thus produced is closed at its leading end and bundled at its trailing end.
- the wire bundle is gathered such that an internal thread can be produced therein for engaging with the guide wire of a insertion instrument.
- the braiding 2 is brought into the form desired for occlusion device 1 .
- the initial structure is suitable for manufacturing an occlusion device 1 for the treatment of a patent foramen ovale (PFO), ventricular septal defect (VSD), atrial septal defect (ASD) or persistent ductus arteriosus (PDA).
- PFO patent foramen ovale
- VSD ventricular septal defect
- ASD atrial septal defect
- PDA persistent ductus arteriosus
- FIG. 10 b shows a side sectional view of the right side of an inventive PFO-type occlusion device 1 , whereby this PFO-occlusion device 1 is made from a spherical braiding 2 as described above.
- FIG. 10 c moreover shows a side sectional view of the right side of an inventive ASD-type occlusion device 1 , whereby this ASD-occlusion device 1 as well is made from a spherical braiding 2 , the manufacture of which is described above.
- FIG. 11 furthermore shows another side view of an inventive PFO-type of occlusion device 1 .
- FIG. 12 discloses a side sectional view of the right side of an inventive VSD-type occlusion device 1 , whereby this VSD-occlusion device 1 is made from a ball-shaped, bulb-shaped or teardrop-shaped initial braiding 2 as described above.
- FIGS. 13 and 14 respectively depict sectional views of the right sides of occlusion devices 1 of the ASD and PDA types.
- the inventive occlusion devices shown in FIGS. 13 and 14 are in turn made from a ball-shaped, bulb-shaped or teardrop-shaped initial braiding structure in accordance with FIGS. 9 a - 9 c , whereby said initial braiding is produced as described above.
- an expanded diameter i.e. distal retention area 8
- crosspiece 10 to which another expanded closed diameter (i.e. proximal retention area 6 , proximal wall 112 respectively) is joined.
- fabric inserts can be introduced into crosspiece 10 and in the expanding diameters—distal and/or proximal retention areas 6 , 8 . These fabric inserts, preferably of Dacron, then close the gaps remaining in braiding 2 when occlusion device 1 is in its inserted state. Said fabric inserts can be secured for example by being stretched over the proximal opening like a cloth.
- FIG. 6 depicts the braiding head 11 of the round braiding machine 7 from FIG. 4 in greater detail
- FIG. 7 shows an example of a braiding 2 produced with the braiding head 11 shown in FIG. 6 , which can serve as the starting structure for the occlusion device 1 according to the invention.
- the braiding 2 serving as the base structure for occlusion device 1 is configured in the form of a tubular or bag-shaped braiding 2 closed to it top which only needs to be provided with one holder 5 at its end 3 , while the threads or wires 4 on the opposite side 12 are, for example, intertwined from the center outward.
- the closed braiding 2 can be shaped as a ball (cf. FIG. 9 a ), a bulb (cf. FIG. 9 b ) or also a teardrop (cf. FIG. 9 c ), whereby only one holder 5 having an internal thread for snugly connecting with an insertion catheter is provided at distal end 3 .
- the core but also highly specific occlusion device 1 can be manufactured from the ball-shaped ( FIG. 9 a ), bulb-shaped ( FIG. 9 b ) or teardrop-shaped ( FIG. 9 c ) initial braiding structure 2 , as will be described below, whereby this inventive occlusion device 1 can be given substantially improved functional properties such as in particular the extreme flattened form to the proximal wall 112 and without any additional seams in proximal retention area 6 , proximal wall 112 respectively.
- this is an occluder 1 for treating an atrial septal defect (ASD), which is a hole in the heart's atrial septum.
- FIG. 13 shows an example of such an ASD-occluder 1 .
- Occluder 1 can moreover be produced to treat a patent foramen ovale (PFO); i.e. for treating oval openings/apertures in the heart's atrial septum.
- PFO patent foramen ovale
- FIG. 11 shows this type of inventive PFO-occluder.
- FIG. 14 depicts this type of PDA-occluder 1 .
- an occluder 1 for treating a ventricular septal defect is also conceivable; i.e. for treating a hole in the heart's ventricular wall.
- FIG. 12 shows an example of such a VSD-occluder.
Abstract
The present invention relates to an occlusion device (1) consisting of a braiding (2) of thin wires or threads (4) which is given a suitable form in a molding and heat treatment procedure. The occlusion device (1) has a proximal retention area (6) and a distal retention area (8), whereby the ends of the wires or threads (4) converge into a holder (5) in distal retention area (8). A cylindrical crosspiece (10) is furthermore disposed between the proximal and distal retention areas (6, 8). With the objective of providing an occlusion device which positions as flat as possible against the septum at the proximal side of a septal defect in the inserted state, the invention provides for the proximal retention area (6) of the braiding (2) to exhibit a completely closed proximal wall (112) disposed with a continuous surface at the proximal end of the occlusion device (1) which forms the proximal end (12) of said occlusion device (1).
Description
- The present invention relates to an occlusion device consisting of a holder and a braiding of thin wires or threads given a suitable form by means of a molding and heat treatment procedure, whereby the occlusion device has a proximal retention area and a distal retention area, wherein the ends of the wires converge into a holder in the distal retention area, and a cylindrical crosspiece interposed between the proximal and distal retention areas, whereby the two retention areas are positioned on the two sides of a shunt to be occluded in a septum, usually by way of an intravascular surgical procedure, while the crosspiece transverses the shunt. The invention moreover relates to a method for manufacturing said occlusion device.
- Medical technology has long endeavored to be able to occlude septal defects, for instance atrial septal defects, with non-surgical transvenous catheter intervention, in other words, without having to perform an operation in the literal sense. Various different occlusion systems have been proposed, each with their own advantages and disadvantages, without any one specific occlusion system having yet become widely accepted. In making reference to these different systems, the following will use the terms “occluder” or “occlusion device.”
- In all interventional occlusion systems, a self-expanding umbrella system is introduced transvenously into a defect to be occluded in a septum. This type of system might comprise two umbrellas; one positioned at the distal side of the septum, for example (i.e. the side farthest from the median plane of the body/heart), and one at the proximal side of the septum (i.e. the side closer to the median plane of the body), whereby the two umbrella prostheses are subsequently fitted into a double umbrella in the septal defect. Thus, in the assembled state, the occlusion system usually consists of two fixed umbrellas connected to one another by means of a short peg which passes through the defect.
- However, a disadvantage to such known prior art occlusion devices turns out to be the relatively complicated, difficult and complex implantation procedure. Apart from the complicated implantation of the occlusion system in the septal defect to be occluded, the umbrellas utilized are fundamentally susceptible to material fatigue along with fragment fracture. Furthermore, thromboembolic complications are frequently to be anticipated.
- With another type of occlusion device, the so-called Lock-Clamshell umbrella system, two stainless steel, preferably Dacron-covered, umbrellas are provided, each stabilized by four arms. This type of occluder is implanted into the patient through a vein. However, seen as problematic with the Lock-Clamshell occluder is the fact that the insertion instruments necessary to implant the device need to be of relatively large size. A further disadvantage is that many different occluder sizes are needed in order to cope with the respective proportions of the septal defects to be occluded. It thus turns out that the umbrellas do not flatten out completely in the inserted state if the length or the diameter of the crosspiece inserted into the defect is not of an optimum match. This results in incomplete endothelialization. It has furthermore been shown that over a longer period of time, many of the systems implanted into patients' bodies will exhibit material fatigue and fractures in the metallic structures due to the substantial mechanical stresses. This is especially the case given permanent tension between an implant and the septum.
- In order to overcome these disadvantages, self-centering occlusion devices have been developed which are inserted into the body of the patient and introduced into the septal defect to be occluded by way of a minimally-invasive procedure, for example using a catheter and guide wires. Their design is based on the principle that the occlusion device can be tapered to the dimensions of the insertion instrument and/or catheter used for the intravascular surgical procedure. Such a tapered occlusion device is then introduced by catheter into the septal defect to be occluded, respectively into the shunt of the septum defect to be occluded. The occluder is then discharged from the catheter, upon which the self-expanding umbrellas, retention discs respectively, subsequently unfold against the two sides of the septum. The umbrellas in turn comprise fabric inserts made from or covered by, for example, Dacron, with which the defect/shunt is occluded. After a few weeks or months, the body's own tissue more or less completely envelops the implants remaining in the body.
- An example of this type of self-centering occlusion device is known from US printed U.S. Pat. No. 5,725,552, which describes an occlusion device known as the “Amplatz occluder.” This known system will be briefly described below with reference to
FIGS. 15 a to 15 c. Specifically,FIG. 15 a shows a tubular braiding known from the prior art, for example said US printed U.S. Pat. No. 5,725,552, as the base structure or starting body for manufacturing this type of known occlusion device, whereby each end of the tubular braiding needs to be held in a respective holder.FIG. 15 b depicts a side sectional view of the right side of a known PFO-type occlusion device from the prior art, for example said US printed U.S. Pat. No. 5,725,552, with the occlusion device being made from a tubular braiding in accordance withFIG. 15 a, whileFIG. 15 c shows a right-side sectional view of a further ASD-type occlusion device likewise known from US printed U.S. Pat. No. 5,725,552, with this occlusion device also being made from a tubular braiding in accordance withFIG. 15 a. - To be understood by the term “PFO-type” as used herein is an occlusion device for treating a patent foramen ovale (PFO) while the term “ASD-type occlusion device” refers to an occlusion device for treating atrial septal defects.
- The known occlusion devices consist of a braiding of a plurality of fine, intertwined nitinol wire strands in the shape of a yo-yo. Each braiding is manufactured in its initial form as a rounded braiding having loose wire ends both at its leading end (its proximal side, respectively) as well as at its trailing end (its distal side, respectively). During the subsequent processing of the rounded braiding, these loose ends must then be gathered into a collar and welded together. After the appropriate processing, both the proximal side as well as the distal side of the finished occluder exhibit a protruding collar. Dacron patches are sewn into the distal and proximal retention umbrellas and the interposed crosspiece. Because of the memory effect of the nitinol material used, the two retention umbrellas unfold by themselves upon exiting the catheter, initially in a balloon-like intermediate stage, whereby the retention umbrellas ultimately positioned on the two sides of the septum eventually assume a more or less flattened form. The crosspiece centers itself automatically into the shunt to be occluded as the umbrellas expand.
- Because the collar protrudes past the proximal retention area of the occluder, the problem arises that the inserted implant causes embolic-related problems, in particular consecutive embolization. Because portions of the occlusion device protrude past the septum wall and are in continuous contact with the blood, defense system reactions are also a frequent occurrence. Furthermore, a complete endothelialization of the occluder implant is often prevented.
- An occlusion device of the type indicated at the outset as well as a method for manufacturing such an occlusion device is additionally known from WO 2005/020822 A1. The occlusion device described therein essentially consists of a braiding of thin wires or threads made from a material having shape-memory function. In the expanded state, the known occlusion device exhibits a proximal and a distal retention area as well as a cylindrical crosspiece interposed between the two.
- Because the proximal retention area of the braiding exhibits a form which is open to the proximal end in this prior art, it basically allows the rim of the proximal retention area to lie flat against the septal wall when the occlusion device is in the inserted state while the retention area does not protrude beyond the septal wall.
- The manufacturing process according to WO 2005/020822 A1 utilizes a braiding technique which forms a tubular braiding open to the top, which need only be provided with a holder for bundling the braiding's threads or wires on one end, while at the opposite end, the braiding's threads or wires are intertwined from their center. It thus becomes possible to produce a braiding to serve as the base structure for the known occlusion device, whereby the proximal retention area of the base structure exhibits a form open to the proximal end.
- To further define the occlusion device known from WO 2005/020822 A1 more specifically, particular reference is made to
FIGS. 16 a to 16 c. In detail,FIG. 16 a shows a tulip or bell-shaped braiding having a distal holder known, for example, from WO 2005/020822 A1.FIG. 16 b depicts a sectional view of the right side of a PFO-type occlusion device known from WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance withFIG. 16 a.FIG. 16 c finally shows another sectional view of the right side of an ASD-type occlusion device known from WO 2005/020822 A1, with the occlusion device likewise being made from a tubular braiding in accordance withFIG. 16 a. - In the case of these occlusion devices known from WO 2005/020822 A1, it has proven disadvantageous for the braiding on the proximal end to exhibit an opening which needs to be spanned by, for example, a Dacron insert or a cloth so that the finished occlusion device will no longer be open at its proximal end. Producing such an occlusion device necessitates quite a complex manufacturing process, and one which is thereby cost-intensive. Furthermore, different materials, namely the materials of the braiding and of the Dacron insert or cloth need to be force-fit to one another. Such joints are inherent weak points in terms of material fatigue. Thus, this known type of occluder has an increased risk of material fatigue along with fragment fracture. It has furthermore been shown that such an implanted system can exhibit material fatigue and fractures in the joints between the metallic structures and the Dacron insert after a longer period of time within a patient's body, stemming from the considerable mechanical stresses. This is especially the case when there is permanent tension between the braiding and the insert.
- Moreover, thromboembolic complications need to be considered with the occlusion devices known from WO 2005/020822 A1. While the known system enables the rim of the proximal retention area to lie flat against the septal wall and not have the retention area project beyond the septal wall when the occlusion device is in the inserted state, the proximal end of the known occlusion device nevertheless exhibits a manufacturing-contingent opening at the proximal wall axial to the crosspiece. Even if this opening is—as described above—closed with a Dacron insert, for example, the known system cannot prevent the finished occlusion device from having at least one remaining trough-shaped recess or sometimes even components protruding in the proximal retention area of the occluder, these being at the very location where the opening closed with the Dacron insert is disposed.
- Along with trough-shaped recesses and protruding components comes yet another problem, that of the inserted implant causing embolic-related problems, in particular consecutive embolization. These embolic-related problems arise especially when the patient is suffering from so-called atrial fibrillation of the heart. This is a condition in which frequent excitation of the heart's upper chambers results in their not contracting. As a consequence of the left and right halves of the heart being deprived of contraction, the blood is ineffectively swirled and mixed and thrombi can form in the atrium. A considerable risk when atrial fibrillation causes thrombi to form in the atrium is that these thrombi can be carried along in the bloodstream and enter the arterial circulation. Apoplectic strokes, occurring in approximately 5% of atrial fibrillation patients each year, are a particular consequence of this embolization when not chronically treated with so-called dicumerol, a blood anticoagulant. However, anticoagulating the blood with so-called dicumerol is also not without risks. One side effect of dicumerol treatment is increased bleeding such that there are contraindications for this treatment for approximately 20% of all atrial fibrillation patients and the patients thus have to hazard the risk of a stroke when weighing the bleeding/stroke risk.
- The present invention therefore addresses the problem of refining such an occlusion device as known to medical technology and described in WO 2005/020822 A1 so as to overcome the disadvantages cited above. A particular objective is the providing of an occlusion device applicable to occluding defects of different sizes, whereby implantation of the occluder is to be a simple procedure. Furthermore, the occurrence of such usual occluder complications such as dislocation, partial embolization or occluder material fatigue is to be reduced to the greatest extent possible. Above and beyond that, an occlusion device is to be provided which ensures occlusion of a septal defect with as few portions of the occlusion device as possible protruding past the septum wall so as to avoid the associated and above-cited complications.
- Based on the problem as posed and starting out from the system as known from WO 2005/020822 A1, it is the task of the present invention to provide an occlusion device which lies as flat as possible against the septum in the inserted state at the proximal side of the septal defect, and with which the risk of material fatigue with fragment fracture is considerably reduced, and to do so at a lower manufacturing cost. The present invention moreover has the technical task of providing a method for manufacturing such an occlusion device.
- These tasks are solved in accordance with the invention by an occlusion device of the type specified at the outset having the proximal retention area of the braiding exhibit a completely closed proximal wall at the proximal end of the occlusion device with a continuous surface forming the proximal end of the occlusion device.
- The problem of process-engineering the present invention is furthermore solved by a method for manufacturing the above-cited occlusion device which is characterized by the process step of forming a ball-shaped, bulb-shaped or teardrop-shaped hollow braiding by means of a braiding process known per se and by the process step of forming a proximal retention area and a distal retention area at the bundled first end, and interposing a cylindrical crosspiece between said proximal and distal retention areas. It is thereby provided for the hollow braiding to be bundled at a first distal end and to exhibit a completely closed proximal wall having a continuous surface on an opposite second proximal end.
- To be understood by the term “proximal wall” as used herein is that segment or region of the proximal retention area of the braiding at the proximal end of the occlusion device which forms the closure for the defect to be occluded on the proximal end.
- The particular advantages of the invention lie in providing an intravascular occlusion device, especially for the treatment of septal defects, whereby the occluding device is suited to be administered by catheter to the defect to be occluded. Because the proximal retention area of the braiding has a fully closed proximal wall at the proximal end which exhibits a continuous surface forming the proximal end of the occlusion device, a particular advantage afforded by the occlusion device—independent of the diameter size to the defect to be occluded and independent of the septal wall's thickness—is in its self-adjusting to the defect in the septal wall and doing so specifically that no portion of the occlusion device protrudes into the plane of the septal wall having the defect on the proximal side of the defect. In the inventive solution, this plane; i.e., the plane of the septal wall with the defect, is formed by the fully closed proximal wall of the occlusion device. On the other hand, the inventive solution ensures that this proximal wall will contain no recesses or other “discontinuities” in the mathematical sense such as sharp edges, kinks, etc. whatsoever, so that the usual associated complications, in particular as regards embolic-related problems, can no longer occur.
- Above all to be achieved is that the inserted occlusion device will be fully enveloped by the body's own tissue substantially faster than is the case with the occluding systems known in the prior art. The further advantage of better mechanical stability over the long term compared to the systems known in the prior art is a function derived from using a braiding made of thin wires or threads as the starting material for the inventive occlusion device. This largely prevents fractures from occurring in the structure of the inserted implant. The braiding furthermore has a better rigidity since the entire structure is made from one material and without any connecting joints.
- Especially due to the inventive solution being able to completely dispense with fabric or Dacron inserts, as is the case for example with the occluder system pursuant WO 2005/020822 A, the premature development of material fatigue can be effectively further reduced, whereby even the overall manufacturing costs can be additionally lowered.
- The fully closed proximal wall provided at the proximal retention area of the braiding additionally allows the proximal retention area of the device to flatten completely against the lateral edge of the defect in the inserted state and to specifically do so virtually independently of the diameter to the defect or the thickness of the septal wall. As a result, the occlusion device can be used for a wide range of differently-sized septal defects. Because there is then no need for a holder for the bundled or gathered braiding at the proximal retention area, there are also no components of the occlusion device to protrude beyond the septal wall which prevents the components of the implant from being in continuous contact with the blood. This yields the advantage of there being no threat of the body mounting any defense mechanism reactions or of there being any thromboembolic complications.
- The inventive method affords the prospect of realizing a particularly simple manufacturing of the occlusion device described above. First, a ball-shaped, bulb-shaped or teardrop-shaped hollow braiding is formed, for example using a round braiding machine. The technology used here is one in which the configured braiding is bundled at the trailing end of the length of the braiding; i.e., at what will later be the distal end of the occlusion device, while the leading end of the length of the braiding; i.e., what will later be the proximal end of the occlusion device, is closed. It is thereby possible to manufacture a “bag-shaped” hollow braiding, the bundled end of which corresponds to the distal end of the finished occlusion device and its opposite closed end the proximal end or the proximal wall of the finished occlusion device. Because a known braiding method is used to produce the occlusion device, the finished occlusion device exhibits mechanical properties in terms of, for example, expansion, stability, strength, etc., which can be custom-adapted to the later use of the occlusion device. In advantageous manner, metallic wires or even organic threads can be incorporated into the braiding. It goes without saying that the terms as used herein of “ball-shaped,” “bulb-shaped,” “teardrop-shaped” and “bag-shaped” are to respectively refer to forms which have shapes comparable to a ball, a bulb, a teardrop or a bag. The invention is in particular not limited solely to an exact spherical shape, etc.
- With respect to the occlusion device itself, preferred embodiments of the invention are specified in
subclaims 2 to 10 and, with respect to the manufacturing process, insubclaims - It is particularly preferred for the proximal wall of the occlusion device to exhibit a curved surface as the continuous surface. It is hereby essential that the curvature to this surface have no discontinuities such as, for example, edges, corners, etc. With respect to the term “continuity” as used herein, this refers to the mathematical definition of a continuous surface as known in the field of topology. For example, it would be conceivable for the proximal wall to exhibit a curved surface which in respect to the plane of the septal wall with the defect, has a preferably slightly concave curve so as to ensure a particularly good, i.e. flat and even fitting of the proximal wall against the septal wall. It is of course also conceivable that the surface of the proximal wall be preferably configured to be slightly convex relative the septal wall, this thereby achieving that the force-fit connection between the proximal wall, the peripheral area of the proximal wall respectively, and the septal wall at the defect to be occluded is particularly large so as to thus enable a better anchorage for the occlusion device in the defect to be occluded. It would also be conceivable for the outer region of the proximal wall to be formed with a slight concave which transitions into a convex form toward the middle; i.e. toward the position axial to the crosspiece of the occlusion device. This can also yield advantages, especially as regards anchoring the occlusion device in the defect to be occluded.
- A particularly preferred realization of the latter embodiment in which the proximal wall of the occlusion device exhibits a curved surface as the continuous surface provides for the curved surface to conform to the surface of a section of a ball-shaped, bulb-shaped or teardrop-like body. In other words, this means that the proximal wall of the occlusion device can be configured in the shape of a spherical cap or a segment of a teardrop, for example. Of course, other profiles are just as conceivable here. Of particular advantage is that the inventive solution basically allows for the optimum use of an occlusion device independent of the type and in particular of the size of the defect to be occluded.
- It is of particular preference for the occlusion device to have the braiding consist of nitinol or of another shape-memory material or material having memory effect. Such other material could conceivably be, for example, copper-zinc-aluminum alloys, gold-cadmium alloys or even ferrous alloys such as e.g. iron-manganese-silicon alloys, or also plastics, all of which are characterized by their extremely high memory capacity.
- It is particularly preferably provided for the braiding of the inventive occlusion device to be formed from a shape-memory polymer based on, for example, a polyanhydride matrix or on a polyhydroxycarboxylic acid. These are synthetic degradable materials which have a thermally-induced shape-memory effect. Yet also conceivable would be other shape-memory polymers such as, for example, block copolymers as described for example in the special edition of Angewandte Chemie 1 2002, 114, pages 2138 to 2162, by A. Lendlein and S. Kelch.
1 “Applied Chemistry”
- By making use of such a material, it is possible to utilize a bag-shaped hollow braiding which is closed at its one end and open and bundled at its other end for the starting body of the occlusion device, produced for example in a round braiding method. Said starting body is then subsequently brought into the desired form for the occlusion device by means of a molding and heat treatment procedure. Other treatment procedures are of course also conceivable here.
- An advantageous further development of the latter described embodiment of the inventive occlusion device in which the braiding is made from a shape-memory material provides for the material to be a biodegradable shape-memory polymer material. Synthetic biodegradable implant material is particularly suitable. Such degradable materials or polymers contain cleavable bonds under physiological conditions. “Biodegradableness” refers to material degraded by or in a biological system based on loss of mechanical property. Under certain conditions, the outer shape as well as the dimensions of the implant are preserved during this degradation. If one speaks of a degradation time without adding any additional quantifying information, this refers to the time it takes for the complete loss of the mechanical property. Biostable materials refer to those which remain stable in biological systems and at least partly degrade in same over the long term.
- In the case of degradable polymers, there is a differentiation to be made between hydrolytically and enzymatically degradable polymers. Hydrolytic degradation has the advantage that the rate of degradation is independent of the implantation site since water is present everywhere. In contrast, local enzyme concentrations differ greatly. With biodegradable polymers or materials, degradation thus ensues from pure hydrolysis, enzymatically-induced reactions or through a combination of the two. Typical hydrolyzable chemical bonds are amide, esterase or acetal bonds. When degrading, two mechanisms can be observed. With surface degradation, the hydrolysis of chemical bonds occurs solely on the surface. Due to its hydrophobic nature, polymer degradation occurs faster than the water diffusion inside the material. This mechanism is above all observed with poly(anhydride)s or poly(orthoester)s. For the poly(hydroxy carboxylic acid)s such as poly(lactic acid)s or poly(glucose acid)s, the corresponding copolymers respectively, which are of predominant importance for the shape-memory effect, the entire volume of the polymer will degrade. The element determining the rate is hereby the hydrolytic bond cleavage since water diffusion occurs relatively quickly in the rather hydrophilic polymer matrix. Crucial to the use of biodegradable polymers is that, on the one hand, the degradation rate be controlled or variable and, on the other, that the products of degradation are non-toxic.
- The invention claims all the afore-mentioned biodegradable shape-memory polymers.
- It is particularly preferred in one development of the inventive occlusion device to have the braiding of the occlusion device taper to the diameter of a catheter to be used in the minimally-invasive surgical procedure. The advantage to this embodiment is in particular to be seen in that the catheter system used for implantation and explantation can have a considerably reduced inner diameter, which above all significantly increases maneuverability of the occlusion device to be implanted. This thus improves the accuracy when positioning the device in the defect to be occluded. In the case of an occluder made from nitinol, the inner diameter of the catheter to be used during implantation or explantation ranges between 8 to 10 Frenches, whereas in the case of occlusion devices made from polymer synthetics, the inner diameter only need be between 6 and 8 Frenches.
- With respect to the latter cited preferred embodiment of the inventive solution according to which the braiding of the occlusion device tapers to the diameter of the catheter used in an intravascular surgical procedure, a further development provides for the proximal retention area of the occlusion device with its proximal wall to be configured such that the proximal wall curves outward upon the occlusion device expanding so as to come into position in such manner with the septal wall. This reflects a particularly simple to realize and thereby effective way to form the proximal wall in the occlusion device. It is thus possible to form the entire occlusion device as one single piece of braiding so that no mechanical connecting elements are needed between the proximal wall and the crosspiece on the one hand and, on the other, the dimensions of the occlusion device in the folded state can be further minimized. Of course, other embodiments for forming the proximal wall at the proximal retention area are just as conceivable here.
- So that the inventive occlusion device will exhibit the functionality of retrievability, a preferred further development of the occlusion device provides for the distal retention area to exhibit a holder, preferably arranged axially to the crosspiece, whereby the holder has at least one connecting element engageable with a catheter. With this connecting element, which is preferably arranged on the distal end of the occlusion device such that it does not project over the distal end of the septal wall, preventing the components of the implant from being in continuous contact with the blood, explanting the occlusion device according to this further development becomes a simple process. A connecting element which can engage with a catheter meanwhile facilitates the implanting and positioning of the occlusion device (folded during the implantation procedure) in the septal defect to be occluded. Various different mechanisms are conceivable as connecting elements such as engaging members, for example, or even hooks and/or eyelets which can be force-fit to the corresponding complementary-configured connecting elements of a catheter.
- Another advantageous further development provides for the occlusion device to be configured to be reversibly foldable and expandable so that the device in its expanded state can be folded back up again, for example with the aid of an explantation catheter, whereby the force-fit connection between the proximal wall formed at the proximal retention area, the peripheral area of the proximal wall respectively, and the septal wall can be disengaged. It is thereby conceivable during explantation for a catheter to engage with a connecting element at the distal end of the occlusion device for example, with the folding of the occlusion device being effected by external manipulation aided by the catheter. The occlusion device is thus completely reversibly retractable in the catheter, which enables the complete removal of the device.
- The method according to the invention affords the prospect of realizing a particularly simple manufacturing of the occlusion device described above. First, a ball-shaped or bag-shaped hollow braiding is formed, using for example a round braiding machine as has already been described in the WO 2005/020822 A1 patent application. However, a special braiding head is necessary to do so, which will be described in greater detail below with reference to the figures. The technology used in particular here is one in which the configured braiding is bundled at the trailing end of the length of the braiding; i.e., at what will later be the distal end of the occlusion device, while the leading end of the length of the braiding; i.e., what will later be the proximal end of the occlusion device, is closed. It is thereby possible to produce a spherical or bag-like hollow braiding, the bundled end of which corresponds to the distal end of the finished occlusion device and the opposite closed end to the proximal end of the finished occlusion device. The finished occlusion device exhibits mechanical properties in terms of, for example, expansion, stability, strength, etc., which can be custom-adapted to the later use of the occlusion device. In advantageous manner, metallic wires or even organic threads can be incorporated into the braiding.
- With respect to the method, it is preferably provided for the process step of forming the retention area and the crosspiece to include a procedural molding and heat treatment step. This is of particular advantage when the ball-shaped hollow braiding formed is made from nitinol or another material which has shape-memory properties or effect. Preferably provided for the inventive occlusion device is forming the braiding from a shape-memory polymer which is based on a polyanhydride matrix or a polyhydroxy-carboxylic acid, for example. These are synthetic degradable materials which have a thermally-induced shape-memory effect. Yet other shape-memory polymers such as for example block copolymers would also be conceivable. The essential point is that such materials can be readily and simply brought into their applicable final form using a combination of molding and heat treatment steps. A finished occluder can then be tapered to the dimensions of a catheter, for example. After exiting the catheter, the occlusion device then unfolds by itself and again assumes that profile to the ball-shaped hollow braiding to which the occlusion device was molded during the manufacturing process in the molding and heat treatment step.
- It is preferred for the ball-shaped hollow braiding to be manufactured in such a manner that the thin threads or wires constituting the finished braiding intertwine at the proximal end of said braiding when the ball-shaped hollow braiding is formed. This represents a conceivable and especially simple manner of producing an occlusion device in accordance with the present invention, the proximal retention area of which exhibits a closed, flat form to the proximal end (proximal surface). Of course, other manufacturing methods are naturally also conceivable.
- The following will make reference to the drawings in providing a more precise detailing of preferred embodiments of the inventive occlusion device as well as of a round braiding machine to provide clarification of the inventive manufacturing method for the occlusion device by example.
- Shown are:
-
FIG. 1 a perspective view of a preferred first embodiment of an occlusion device according to the present invention in expanded state in which only the outlined contour of the occlusion device is depicted; -
FIG. 2 a perspective detail view of the distal retention area of the first embodiment of theFIG. 1 occlusion device in the expanded state; -
FIG. 3 a side view of the inventive occlusion device shown inFIG. 2 in the expanded state; -
FIG. 4 a three-dimensional view of a round braiding machine to illustrate the inventive manufacturing method for the occlusion device; -
FIG. 5 a top plan view onto the round braiding machine depicted inFIG. 4 to illustrate the inventive manufacturing method for a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c, which can serve as a base structure for the occlusion device according to the present invention; -
FIG. 6 a detail view of the braiding head of the round braiding machine depicted inFIG. 4 ; -
FIG. 7 an example of a braiding produced with the braiding head shown inFIG. 6 , which can serve as the base structure for the occlusion device according to the present invention; -
FIG. 8 a a side view of a special braiding head for manufacturing a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c, which can serve as the base structure for the occlusion device according to the present invention; -
FIG. 8 b a sectional view of the braiding head according toFIG. 8 a; -
FIG. 8 c a stereoscopic representation of the special braiding head used to produce a spherical braiding; -
FIG. 9 a a perspective representation of a base body for a spherical braiding constituting the initial body for the inventive occlusion device, whereby the base body is configured in a form as close to a ball as possible; -
FIG. 9 b a perspective representation of a base body for a spherical braiding suited for producing the occlusion device according to the present invention and whereby the base body is configured to the greatest extent possible in the form of a bulb-shaped body; -
FIG. 9 c a perspective representation of a base body for a spherical braiding, whereby the base body is suited for producing the occlusion device according to the present invention and whereby the base body is configured in a teardrop-shaped form; -
FIG. 10 a a spherical braiding as a base body for different occlusion devices in accordance with the present invention which is produced with a special braiding method and which exhibits a distal holder; -
FIG. 10 b a sectional side view of the right side of an inventive PFO-type occlusion device, whereby the occlusion device is made from a spherical braiding in accordance withFIG. 9 a; -
FIG. 10 c a sectional side view of the right side of an inventive ASD-type occlusion device, whereby the occlusion device is made from a spherical braiding in accordance withFIG. 9 a; -
FIG. 11 a sectional side view of the right side of an inventive PFO-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c and comprises a distal holder; -
FIG. 12 a sectional side view of the right side of an inventive VSD-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c and comprises a distal holder; -
FIG. 13 a sectional side view of the right side of an inventive ASD-type occlusion device according to the invention, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c and comprises a distal holder; -
FIG. 14 a sectional side view of the right side of an inventive PDA-type occlusion device, whereby the occlusion device is made from a ball-shaped, bulb-shaped or teardrop-shaped base braiding structure in accordance withFIGS. 9 a-9 c and comprises a distal holder; -
FIG. 15 a a tubular braiding known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, constituting the starting structure or base for manufacturing a known occlusion device, whereby the respective ends of the tubular braiding need to be held in a holder; -
FIG. 15 b a sectional side view of the right side of a PFO-type occlusion device known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, whereby the occlusion device is made from a tubular braiding in accordance withFIG. 15 a; -
FIG. 15 c a sectional side view of the right side of an ASD-type occlusion device known from the prior art, for example in accordance with US printed U.S. Pat. No. 5,725,552, whereby the occlusion device is made from a tubular braiding in accordance withFIG. 15 a; -
FIG. 16 a a tulip-shaped or bell-shaped braiding having a distal holder as known from the prior art, for example from WO 2005/020822 A1; -
FIG. 16 b a sectional side view of the right side of a PFO-type occlusion device known from the prior art, for example in accordance with WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance withFIG. 16 a; and -
FIG. 16 c a sectional side view of the right side of an ASD-type occlusion device known from the prior art, for example in accordance with WO 2005/020822 A1, whereby the occlusion device is made from a tubular braiding in accordance withFIG. 16 a. -
FIG. 1 shows a perspective view of a preferred first embodiment of theocclusion device 1 according to the invention in the expanded state, whereby only the outlined contour ofocclusion device 1 is depicted inFIG. 1 .FIG. 2 shows a perspective detail view of thedistal retention area 8 of the first embodiment of theocclusion device 1 shown in the expanded state inFIG. 1 .FIG. 3 shows a side view of theinventive occlusion device 1 shown in expanded state inFIG. 2 . - The
occlusion device 1 essentially consists of abraiding 2 of thin wires orthreads 4, preferable made from nitinol or another shape-memory material or material having memory effect. Thebraiding 2 exhibits sufficient flexibility such that theocclusion device 1 can be tapered to the diameter of a (not explicitly shown) catheter used in an intravascular surgical procedure. Because of the material's memory effect, theocclusion device 1 tapered as such has a shape-memory function such that thedevice 1 self-expands after exiting the catheter and reassumes the predefined form which corresponds to its use. This normally ensues after theocclusive device 1 initially disposed in the catheter has been positioned at the location to be treated. - As especially shown in
FIGS. 2 and 3 , theocclusion device 1 exhibits aproximal retention area 6, adistal retention area 8 and acylindrical crosspiece 10 arranged between said proximal anddistal retention areas retention areas areas occlusion device 1 according to the invention therefore represents an occluding system which can be introduced into a patient's body and positioned at its intended location in a minimally-invasive procedure; i.e., using a catheter and guide wires, for example. - The design to the
inventive occlusion device 1 is thereby based on the principle of having theocclusion device 1 taper to the dimensions of the catheter. After being discharged from the catheter, theretention areas occlusion device 1 being a self-positioning and self-centering system. Thecrosspiece 10 thereby has the length of the atrial diaphragm, the septum respectively, in order to ensure secure placement ofretention areas - Unlike conventional occlusion systems known from the prior art in which a self-expanding umbrella serves as
proximal retention area 6, theproximal retention area 6 of the present invention has a flat covering in the form of aproximal wall 112 closed to theproximal end 12 such that no material of the implantedocclusion device 1 whatsoever can extend past the septum wall in the proximal area of the patient's organ. The closed contouring to theproximal end 12 ofproximal retention area 6 further ensures that the rim ofproximal retention area 6 will always lie flush with the septum wall. This occurs over a relatively wide area independent of the diameter to the defect or the thickness of the atrial diaphragm, the septum respectively, and thereby allows complete endothelialization to occur relatively quickly after theocclusion device 1 has been implanted and precludes any possible defense mechanism reactions from the patient's body since the blood is effectively prevented from coming into contact with the material ofimplant 1. - Because of the self-expanding property to implant 1 based on the memory effect of the material used, the
occlusion device 1 according to the invention exhibits a self-centering function in the shunt or the septal defect. Theocclusion device 1 can furthermore be retracted at any time up to the uncoupling of the guide wires of the insertion instrument. - The
occlusion device 1 according to the invention can of course furthermore comprise fabric inserts, which are not explicitly shown in the present drawings, the principle behind which is known from the prior art. Such fabric inserts consist mostly of Dacron material. Chemically speaking, Dacron is a polyethylene terephthalate polyester, obtained by polycondensating ethylene glycol and terephthalic acid—dimethyl ester. It is hereby conceivable to incorporate the fabric inserts within the interior ofcrosspiece 10 or at theproximal end 12 ofretention area 6 in order to be able to fully occlude the defect or the shunt in the septum wall. The fabric inserts can be incorporated by bracing same withinocclusion device 1, for example. Theimplant 1 inserted into the body will then be completely enveloped by the body's own tissue within a few weeks or months. - The
braiding 2 which serves as the base structure for theocclusion device 1 according to the invention exhibits sufficient rigidity to clamp the fabric insert and have it remain in position. - The
braiding 2 converges into aholder 5 at thedistal end 3 ofdistal retention area 8. This is thereby realized by producing an internal thread inholder 5 which then serves to engage with a guide wire of a not shown insertion instrument when theocclusion device 1 is being guided to the appropriate position relative the location of the defect in the septum, for example in an intravascular surgical procedure. After theocclusion device 1 has been positioned in the shunt or defect, the engagement between the guide wire of the insertion instrument anddistal end 3 is then disengaged. It is, of course, also conceivable to make use of a differently-configured mechanism in place of an internal thread inholder 5 atdistal end 3. - As already indicated,
FIG. 1 shows a perspective view of the preferred first embodiment of theocclusion device 1 according to the invention in expanded state whileFIG. 2 shows a perspective partial view of thedistal retention area 8 of theocclusion device 1 shown inFIG. 1 . For simplification purposes,FIG. 1 only shows the outline ofocclusion device 1. For even further simplification, a detailed depiction of thebraiding 2 serving as the base structure is dispensed with and the form ofocclusion device 1 is shown as that of a closed surface. Thisocclusion device 1 exhibits a much flatterproximal retention area 6 compared to the first embodiment. Depending upon actual intended application, theproximal retention area 6 is configured in a more or less distinctly flattened shape so as to ultimately form theproximal wall 112 in the expanded state. Yet also conceivable would be for theproximal wall 112 to exhibit a completely flattened spherical shape or an almost plate-shaped profile. -
FIG. 4 shows a three-dimensional view of around braiding machine 7 in order to illustrate the method of manufacturing theocclusion device 1 according to the present invention.FIG. 5 is a top plan view of theround braiding machine 7 depicted inFIG. 4 in order to illustrate the inventive manufacturing method for a ball-shaped, bulb-shaped or teardrop-shapedinitial braiding structure 2 according toFIGS. 9 a-9 c, which can serve as the starting structure for theocclusion device 1 according to the invention.FIG. 6 further shows abraiding head 11 for theround braiding machine 7 ofFIG. 4 in greater detail, whileFIG. 7 shows abraiding 2 made for example with thebraiding head 11 shown inFIG. 6 , which can serve as the base structure for theocclusion device 1 according to the invention.FIG. 8 a is furthermore a side view of aspecial braiding head 11 for manufacturing a ball-shaped, bulb-shaped or teardrop-shapedinitial braiding 2 according toFIGS. 9 a-9 c, which likewise can serve as the base structure for theinventive occlusion device 1. Thebraiding head 11 according toFIG. 8 a is further shown in sectional view inFIG. 8 b, whileFIG. 8 c depicts a stereoscopic representation of thespecial braiding head 11 for manufacturing a spherical braiding of this type. - In contrast to the known braiding methods where all the threads or
wires 4 are gathered into one bundle at the leading end of thebraiding 2 and stretched to an extractor device, in the method according to the invention, the material supply is stretched from everysecond spool 9 to abraiding head 11 and from there to each nextrespective spool 13 or a multiple of the dividing gap. Thespools 13 not having a material supply only have an auxiliary thread extending at least to braidinghead 11. The end of the material supply is connected to the end of the auxiliary thread as close as possible to the auxiliary thread spool by means of bolt 14. - The
braiding head 11, depicted in detail in the latter cited figures, is of crown-shaped configuration and is provided withform elements 15 which allow the threads orwires 4 to be hooked.Form elements 15 can be lowered in order to hook/unhookbraiding 2.Braiding head 11 is axially positioned at the center of the orbit ofimpellers 16 such that the threads orwires 4 are aligned at a flat downward angle tobobbins 17 of thebraiding machine 7. - After all the
wires 4 required for thebraiding 2 have been joined and tightened, braiding commences in conventionally known manner in that impellers 16 rotate around the center whilebobbins 17 shift from impeller to impeller, their orbits thereby crossing. The infeed forbraiding 2 is realized by means of acam plate 18 based on the revolutions ofimpellers 16. The length to the braiding which can be produced with this method is proportional to the circumference and pitch of braiding 2 as well as to the length of the end of the wire or thread connected to the auxiliary thread. Subsequent braiding, the free ends are bundled or gathered, lopped off from the material supply and uncoupled from the auxiliary thread. The ball-shaped or bag-likehollow braiding 2 thus produced is closed at its leading end and bundled at its trailing end. The wire bundle is gathered such that an internal thread can be produced therein for engaging with the guide wire of a insertion instrument. - In the subsequent material-dependent molding and heat treatment process, the
braiding 2 is brought into the form desired forocclusion device 1. The initial structure is suitable for manufacturing anocclusion device 1 for the treatment of a patent foramen ovale (PFO), ventricular septal defect (VSD), atrial septal defect (ASD) or persistent ductus arteriosus (PDA). - It is noted at this point that
FIG. 10 b, for example, shows a side sectional view of the right side of an inventive PFO-type occlusion device 1, whereby this PFO-occlusion device 1 is made from aspherical braiding 2 as described above.FIG. 10 c moreover shows a side sectional view of the right side of an inventive ASD-type occlusion device 1, whereby this ASD-occlusion device 1 as well is made from aspherical braiding 2, the manufacture of which is described above.FIG. 11 furthermore shows another side view of an inventive PFO-type ofocclusion device 1. - It is furthermore pointed out that
FIG. 12 discloses a side sectional view of the right side of an inventive VSD-type occlusion device 1, whereby this VSD-occlusion device 1 is made from a ball-shaped, bulb-shaped or teardrop-shapedinitial braiding 2 as described above. Finally, reference is made toFIGS. 13 and 14 which respectively depict sectional views of the right sides ofocclusion devices 1 of the ASD and PDA types. The inventive occlusion devices shown inFIGS. 13 and 14 are in turn made from a ball-shaped, bulb-shaped or teardrop-shaped initial braiding structure in accordance withFIGS. 9 a-9 c, whereby said initial braiding is produced as described above. - From the perspective of
holder 5 and depending upon configuration, an expanded diameter (i.e. distal retention area 8) is formed, followed bycrosspiece 10, to which another expanded closed diameter (i.e.proximal retention area 6,proximal wall 112 respectively) is joined. - Since circumstances dictate that
braiding 2 serving as the base for theocclusion device 1 cannot as such always fully occlude a defect, fabric inserts can be introduced intocrosspiece 10 and in the expanding diameters—distal and/orproximal retention areas braiding 2 whenocclusion device 1 is in its inserted state. Said fabric inserts can be secured for example by being stretched over the proximal opening like a cloth. - Reference is herewith again made to
FIG. 6 which depicts thebraiding head 11 of theround braiding machine 7 fromFIG. 4 in greater detail, whileFIG. 7 shows an example of abraiding 2 produced with thebraiding head 11 shown inFIG. 6 , which can serve as the starting structure for theocclusion device 1 according to the invention. Clearly to be seen here is that thebraiding 2 serving as the base structure forocclusion device 1 is configured in the form of a tubular or bag-shapedbraiding 2 closed to it top which only needs to be provided with oneholder 5 at itsend 3, while the threads orwires 4 on theopposite side 12 are, for example, intertwined from the center outward. - The
closed braiding 2 can be shaped as a ball (cf.FIG. 9 a), a bulb (cf.FIG. 9 b) or also a teardrop (cf.FIG. 9 c), whereby only oneholder 5 having an internal thread for snugly connecting with an insertion catheter is provided atdistal end 3. - The core but also highly
specific occlusion device 1 can be manufactured from the ball-shaped (FIG. 9 a), bulb-shaped (FIG. 9 b) or teardrop-shaped (FIG. 9 c)initial braiding structure 2, as will be described below, whereby thisinventive occlusion device 1 can be given substantially improved functional properties such as in particular the extreme flattened form to theproximal wall 112 and without any additional seams inproximal retention area 6,proximal wall 112 respectively. - Specifically, this is an
occluder 1 for treating an atrial septal defect (ASD), which is a hole in the heart's atrial septum.FIG. 13 shows an example of such an ASD-occluder 1. -
Occluder 1 can moreover be produced to treat a patent foramen ovale (PFO); i.e. for treating oval openings/apertures in the heart's atrial septum.FIG. 11 shows this type of inventive PFO-occluder. - It is moreover conceivable in accordance with the invention, to manufacture an occluder to treat persistent ductus arteriosus (PDA), meaning to treat an open channel between the aorta and the pulmonary artery.
FIG. 14 depicts this type of PDA-occluder 1. - It is also pointed out in conclusion that, according to the invention, an
occluder 1 for treating a ventricular septal defect (VSD) is also conceivable; i.e. for treating a hole in the heart's ventricular wall.FIG. 12 shows an example of such a VSD-occluder. - Attention is drawn to the fact that realizing the invention is not limited to the embodiments specified by the figures, but is instead feasible in a plurality of variants.
-
- 1 occlusion device
- 2 braiding
- 3 distal end
- 4 thread, wire
- 5 holder
- 6 proximal retention area
- 7 braiding machine
- 8 distal retention area
- 9 spool
- 10 crosspiece
- 11 braiding head
- 12 proximal end
- 13 spool
- 14 bolt
- 15 form element
- 16 impeller
- 17 bobbin
- 18 cam plate
Claims (13)
1. An occlusion device consisting of a holder and a braiding of thin wires or threads, which is given a suitable form in a molding and heat treatment procedure, having a proximal retention area and a distal retention area, wherein the ends of the wires or threads converge into a holder in the distal retention area, and a cylindrical crosspiece interposed between said proximal and distal retention areas, wherein the two retention areas are positioned on the two sides of a shunt to be occluded in a septum usually by way of an intravascular surgical procedure while said crosspiece transverses the shunt, characterized in that
the proximal retention area of braiding exhibits a completely closed proximal wall having a continuous surface at the proximal end of the occlusion device which forms the proximal end of said occlusion device.
2. The occlusion device according to claim 1 , wherein the proximal wall exhibits a curved surface as the continuous surface.
3. The occlusion device according to claim 2 , wherein the curved surface conforms to the surface of a section of a ball-shaped, bulb-shaped or teardrop-like body.
4. The occlusion device according to claim 1 , wherein the braiding consists of nitinol or another material having shape-memory or memory effect.
5. The occlusion device according to claim 4 , wherein the shape-memory material is a biodegradable material.
6. The occlusion device according claim 1 , wherein the braiding tapers to the diameter of a catheter to be used in an intravascular surgical procedure.
7. The occlusion device according to claim 6 , wherein the proximal retention area with its proximal wall is configured such that said proximal wall curves outward upon expansion of the occlusion device so as to come into position in such manner with the septal wall.
8. The occlusion device according to claim 1 , wherein the distal retention area exhibits a holder preferably arranged axially to crosspiece.
9. The occlusion device according to claim 8 , wherein at least one connecting element is further provided at distal retention area, wherein said connecting element is engageable with a catheter.
10. The occlusion device according claim 1 , wherein the occlusion device is configured to be reversibly foldable and expandable such that the expanded occlusion device can be folded up using an explantation catheter, wherein the force-fit connection between the proximal wall and the septal wall is disengaged.
11. A method of manufacturing an occlusion device, in particular an occlusion device according to any one of the preceding claims, wherein the method comprises the following procedural steps:
forming a ball-shaped, bulb-shaped or teardrop-shaped hollow braiding by means of a braiding process known per se, wherein said hollow braiding is bundled at a first distal end and exhibits a completely closed proximal wall having a continuous surface on an opposite second proximal end; and
forming a proximal retention area on the proximal wall, a distal retention area on the bundled first end, and a cylindrical crosspiece arranged between said proximal and distal retention areas.
12. The method according to claim 11 further comprising the procedural step of forming a holder on the bundled distal end of the hollow braiding.
13. The method according to claim 11 , wherein the procedural step of forming the retention areas and the crosspiece includes molding and/or heat treatment.
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US16/745,209 US11751858B2 (en) | 2006-03-24 | 2020-01-16 | Occlusion device and method for its manufacture |
US18/364,432 US20240016488A1 (en) | 2006-03-24 | 2023-08-02 | Occlusion Device And Method For Its Manufacture |
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US15/357,394 Active 2028-08-21 US10743852B2 (en) | 2006-03-24 | 2016-11-21 | Occlusion device and method for its manufacture |
US16/745,209 Active 2028-03-30 US11751858B2 (en) | 2006-03-24 | 2020-01-16 | Occlusion device and method for its manufacture |
US18/364,432 Pending US20240016488A1 (en) | 2006-03-24 | 2023-08-02 | Occlusion Device And Method For Its Manufacture |
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US16/745,209 Active 2028-03-30 US11751858B2 (en) | 2006-03-24 | 2020-01-16 | Occlusion device and method for its manufacture |
US18/364,432 Pending US20240016488A1 (en) | 2006-03-24 | 2023-08-02 | Occlusion Device And Method For Its Manufacture |
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EP (7) | EP2266465B2 (en) |
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Cited By (102)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060241690A1 (en) * | 2004-03-19 | 2006-10-26 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body |
US20060271153A1 (en) * | 2005-05-25 | 2006-11-30 | Chestnut Medical Technologies, Inc. | System and method for delivering and deploying an occluding device within a vessel |
US20080221600A1 (en) * | 2006-08-17 | 2008-09-11 | Dieck Martin S | Isolation devices for the treatment of aneurysms |
US20090192536A1 (en) * | 2005-05-25 | 2009-07-30 | Chestnut Medical Technologies, Inc. | System and method for delivering and deploying an occluding device within a vessel |
US20090210048A1 (en) * | 2008-02-18 | 2009-08-20 | Aga Medical Corporation | Stent/stent graft for reinforcement of vascular abnormalities and associated method |
WO2010011446A1 (en) * | 2008-07-24 | 2010-01-28 | Aga Medical Corporation | Multi-layered medical device for treating target site and associated method |
US20100121370A1 (en) * | 2008-11-11 | 2010-05-13 | Aga Medical Corporation | Asymmetrical medical devices for treating a target site and associated method |
US20110144689A1 (en) * | 2009-12-15 | 2011-06-16 | Med Institute, Inc. | Occlusion Device |
US8142456B2 (en) | 2008-04-21 | 2012-03-27 | Nfocus Neuromedical, Inc. | Braid-ball embolic devices |
US20120143242A1 (en) * | 2009-06-22 | 2012-06-07 | Masters Steven J | Sealing Device and Delivery System |
US8261648B1 (en) | 2011-10-17 | 2012-09-11 | Sequent Medical Inc. | Braiding mechanism and methods of use |
US8273101B2 (en) | 2005-05-25 | 2012-09-25 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US20120271337A1 (en) * | 2007-04-16 | 2012-10-25 | Hans-Reiner Figulla | Occluder For Occluding an Atrial Appendage and Production Process Therefor |
US8382825B2 (en) | 2004-05-25 | 2013-02-26 | Covidien Lp | Flexible vascular occluding device |
US8394119B2 (en) | 2006-02-22 | 2013-03-12 | Covidien Lp | Stents having radiopaque mesh |
US8398701B2 (en) | 2004-05-25 | 2013-03-19 | Covidien Lp | Flexible vascular occluding device |
EP2575630A1 (en) | 2010-05-23 | 2013-04-10 | Occlutech Holding AG | Medical implant and manufacturing method thereof |
EP2617386A1 (en) * | 2010-09-16 | 2013-07-24 | Lifetech Scientific (Shenzhen) Co., Ltd. | Occlusion device and method for its manufacture |
US20130218202A1 (en) * | 2009-06-22 | 2013-08-22 | W.L. Gore & Associates, Inc. | Sealing Device and Delivery System |
US8617234B2 (en) | 2004-05-25 | 2013-12-31 | Covidien Lp | Flexible vascular occluding device |
US8623067B2 (en) | 2004-05-25 | 2014-01-07 | Covidien Lp | Methods and apparatus for luminal stenting |
US20140012303A1 (en) * | 2010-05-23 | 2014-01-09 | Occlutech Holding Ag | Braided Medical Device And Manufacturing Method Thereof |
US8777974B2 (en) | 2004-03-19 | 2014-07-15 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects |
US20140207185A1 (en) * | 2013-01-18 | 2014-07-24 | W.L. Gore & Associates, Inc. | Sealing Device and Delivery System |
US8826791B2 (en) | 2011-10-17 | 2014-09-09 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US8852272B2 (en) * | 2011-08-05 | 2014-10-07 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US8870950B2 (en) | 2009-12-08 | 2014-10-28 | Mitral Tech Ltd. | Rotation-based anchoring of an implant |
US8926681B2 (en) | 2010-01-28 | 2015-01-06 | Covidien Lp | Vascular remodeling device |
US8992604B2 (en) | 2010-07-21 | 2015-03-31 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US20150105817A1 (en) * | 2008-05-02 | 2015-04-16 | Sequent Medical Inc. | Filamentary devices for treatment of vascular defects |
US9017399B2 (en) | 2010-07-21 | 2015-04-28 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US9039724B2 (en) | 2004-03-19 | 2015-05-26 | Aga Medical Corporation | Device for occluding vascular defects |
US9060886B2 (en) | 2011-09-29 | 2015-06-23 | Covidien Lp | Vascular remodeling device |
US9078658B2 (en) | 2013-08-16 | 2015-07-14 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US9089332B2 (en) | 2011-03-25 | 2015-07-28 | Covidien Lp | Vascular remodeling device |
US9095342B2 (en) | 2009-11-09 | 2015-08-04 | Covidien Lp | Braid ball embolic device features |
US9114001B2 (en) | 2012-10-30 | 2015-08-25 | Covidien Lp | Systems for attaining a predetermined porosity of a vascular device |
CN104905890A (en) * | 2014-03-14 | 2015-09-16 | 徐州亚太科技有限公司 | Novel degradable stopper implanted through guide pipe and conveying system of novel degradable stopper |
US9155647B2 (en) | 2012-07-18 | 2015-10-13 | Covidien Lp | Methods and apparatus for luminal stenting |
US9157174B2 (en) | 2013-02-05 | 2015-10-13 | Covidien Lp | Vascular device for aneurysm treatment and providing blood flow into a perforator vessel |
US9179918B2 (en) | 2008-07-22 | 2015-11-10 | Covidien Lp | Vascular remodeling device |
US9259337B2 (en) | 2007-06-04 | 2016-02-16 | Sequent Medical, Inc. | Methods and devices for treatment of vascular defects |
US9295571B2 (en) | 2013-01-17 | 2016-03-29 | Covidien Lp | Methods and apparatus for luminal stenting |
US9314248B2 (en) | 2012-11-06 | 2016-04-19 | Covidien Lp | Multi-pivot thrombectomy device |
US9393022B2 (en) | 2011-02-11 | 2016-07-19 | Covidien Lp | Two-stage deployment aneurysm embolization devices |
US9452070B2 (en) | 2012-10-31 | 2016-09-27 | Covidien Lp | Methods and systems for increasing a density of a region of a vascular device |
US9451939B2 (en) | 2009-06-22 | 2016-09-27 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US9463105B2 (en) | 2013-03-14 | 2016-10-11 | Covidien Lp | Methods and apparatus for luminal stenting |
US9468442B2 (en) | 2010-01-28 | 2016-10-18 | Covidien Lp | Vascular remodeling device |
US9474517B2 (en) | 2008-03-07 | 2016-10-25 | W. L. Gore & Associates, Inc. | Heart occlusion devices |
US9532772B2 (en) | 2006-03-24 | 2017-01-03 | Occlutech Holding Ag | Occlusion device and method for its manufacture |
US9629635B2 (en) | 2014-04-14 | 2017-04-25 | Sequent Medical, Inc. | Devices for therapeutic vascular procedures |
US9675482B2 (en) | 2008-05-13 | 2017-06-13 | Covidien Lp | Braid implant delivery systems |
US9681952B2 (en) | 2013-01-24 | 2017-06-20 | Mitraltech Ltd. | Anchoring of prosthetic valve supports |
US9763657B2 (en) | 2010-07-21 | 2017-09-19 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US9770232B2 (en) | 2011-08-12 | 2017-09-26 | W. L. Gore & Associates, Inc. | Heart occlusion devices |
USD800908S1 (en) | 2016-08-10 | 2017-10-24 | Mitraltech Ltd. | Prosthetic valve element |
US9808230B2 (en) | 2014-06-06 | 2017-11-07 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US20180049731A1 (en) * | 2010-04-29 | 2018-02-22 | Muffin Incorporated | Closing device for tissue openings |
US9918720B2 (en) | 2009-11-05 | 2018-03-20 | Sequent Medical Inc. | Multiple layer filamentary devices for treatment of vascular defects |
WO2018053352A1 (en) * | 2016-09-16 | 2018-03-22 | Nsvascular, Inc. | Thin-film micromesh occlusion devices and related methods |
US9943427B2 (en) | 2012-11-06 | 2018-04-17 | Covidien Lp | Shaped occluding devices and methods of using the same |
US9949728B2 (en) | 2007-04-05 | 2018-04-24 | W.L. Gore & Associates, Inc. | Septal closure device with centering mechanism |
US9955976B2 (en) | 2013-08-16 | 2018-05-01 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
RU2654579C2 (en) * | 2016-06-24 | 2018-05-21 | Федеральное государственное бюджетное учреждение "Уральский научно-исследовательский институт фтизиопульмонологии" Министерства здравоохранения Российской Федерации (ФГБУ "УНИИФ" Минздрава России) | Method for surgical treatment of bronchial fistula following pulmonary tuberculosis surgery |
US9974651B2 (en) | 2015-02-05 | 2018-05-22 | Mitral Tech Ltd. | Prosthetic valve with axially-sliding frames |
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US10004618B2 (en) | 2004-05-25 | 2018-06-26 | Covidien Lp | Methods and apparatus for luminal stenting |
USD841812S1 (en) | 2017-08-03 | 2019-02-26 | Cardiovalve Ltd. | Prosthetic heart valve element |
US10245143B2 (en) | 2011-08-05 | 2019-04-02 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
WO2019073480A1 (en) | 2017-10-13 | 2019-04-18 | Sree Chitra Tirunal Institute For Medical Sciences And Technology | Implantable atrial septal defect occlusion device with woven central section on left atrial flange |
US10376361B2 (en) | 2011-08-05 | 2019-08-13 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US10390952B2 (en) | 2015-02-05 | 2019-08-27 | Cardiovalve Ltd. | Prosthetic valve with flexible tissue anchor portions |
US10478194B2 (en) | 2015-09-23 | 2019-11-19 | Covidien Lp | Occlusive devices |
US10492908B2 (en) | 2014-07-30 | 2019-12-03 | Cardiovalve Ltd. | Anchoring of a prosthetic valve |
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US10575948B2 (en) | 2017-08-03 | 2020-03-03 | Cardiovalve Ltd. | Prosthetic heart valve |
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US10856975B2 (en) | 2016-08-10 | 2020-12-08 | Cardiovalve Ltd. | Prosthetic valve with concentric frames |
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US11109964B2 (en) | 2010-03-10 | 2021-09-07 | Cardiovalve Ltd. | Axially-shortening prosthetic valve |
US11246704B2 (en) | 2017-08-03 | 2022-02-15 | Cardiovalve Ltd. | Prosthetic heart valve |
US11253261B2 (en) | 2016-03-17 | 2022-02-22 | Swaminathan Jayaraman | Occluding anatomical structures |
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US11291545B2 (en) | 2011-08-05 | 2022-04-05 | Cardiovalve Ltd. | Implant for heart valve |
US11291453B2 (en) | 2019-03-15 | 2022-04-05 | Sequent Medical, Inc. | Filamentary devices having a flexible joint for treatment of vascular defects |
US11317921B2 (en) | 2019-03-15 | 2022-05-03 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US11337683B2 (en) | 2015-12-31 | 2022-05-24 | Mallow Medical (Shanghai) Co., Ltd. | Degradable occluder |
US11375988B2 (en) | 2003-07-14 | 2022-07-05 | W. L. Gore & Associates, Inc. | Patent foramen ovale (PFO) closure device with linearly elongating petals |
US11382746B2 (en) | 2017-12-13 | 2022-07-12 | Cardiovalve Ltd. | Prosthetic valve and delivery tool therefor |
US11406404B2 (en) | 2020-02-20 | 2022-08-09 | Cerus Endovascular Limited | Clot removal distal protection methods |
US11471162B2 (en) | 2015-12-07 | 2022-10-18 | Cerus Endovascular Limited | Occlusion device |
US11559669B2 (en) | 2019-04-04 | 2023-01-24 | Medtronic, Inc. | Cannula delivery catheter and procedure method |
US11559309B2 (en) | 2019-03-15 | 2023-01-24 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US11633277B2 (en) | 2018-01-10 | 2023-04-25 | Cardiovalve Ltd. | Temperature-control during crimping of an implant |
US11648013B2 (en) | 2016-03-11 | 2023-05-16 | Cerus Endovascular Limited | Occlusion device |
US11653910B2 (en) | 2010-07-21 | 2023-05-23 | Cardiovalve Ltd. | Helical anchor implantation |
US11766556B2 (en) | 2019-04-04 | 2023-09-26 | Medtronic, Inc. | Cannula fixation device |
US11793633B2 (en) | 2017-08-03 | 2023-10-24 | Cardiovalve Ltd. | Prosthetic heart valve |
US11812971B2 (en) | 2017-08-21 | 2023-11-14 | Cerus Endovascular Limited | Occlusion device |
Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2324775B1 (en) | 2007-08-02 | 2012-06-20 | Occlutech Holding AG | Method of producing a medical implantable device |
DE102009036817A1 (en) | 2009-08-10 | 2011-02-17 | Acoredis Gmbh | Occlusion device, useful e.g. for closing the heart defects in a patient and other abnormal body openings, comprises mesh of fibers or film body of highly flexible, elastic materials, where the device is introduced through e.g. catheter |
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IN2014CN03812A (en) * | 2011-10-27 | 2015-10-16 | Occlutech Holding Ag | |
JP2015501691A (en) | 2011-11-23 | 2015-01-19 | オクルテク ホールディング アーゲー | Medical occlusion device |
US11389638B2 (en) | 2012-02-07 | 2022-07-19 | Hridaya, Inc. | Hemodynamic assist device |
CN104185481B (en) * | 2012-02-07 | 2017-02-22 | 赫莱达雅公司 | Hemodynamic assist device |
US20140114346A1 (en) * | 2012-10-23 | 2014-04-24 | Medtronic, Inc. | Transapical Entry Point Closure Device |
EP2941198A4 (en) | 2013-01-06 | 2016-03-30 | Medical Connection Technology Mediconntech M C T Ltd | Connector |
CN103142261B (en) * | 2013-02-04 | 2016-01-20 | 先健科技(深圳)有限公司 | A kind of stopper with the flat card of included-angle-changeable |
US9681861B2 (en) * | 2013-03-11 | 2017-06-20 | St. Jude Medical, Cardiology Division, Inc. | Percutaneous catheter directed collapsible medical closure device |
EP2967576B1 (en) * | 2013-03-15 | 2023-02-15 | Covidien LP | Delivery and detachment mechanisms for vascular implants |
CA2907984A1 (en) * | 2013-03-27 | 2014-10-02 | Hansa Medical Products, Inc. | Septal perforation prosthesis |
JP6002319B2 (en) * | 2013-05-15 | 2016-10-05 | グンゼ株式会社 | Medical materials |
DE102014200580B3 (en) * | 2014-01-15 | 2015-07-16 | Universität Stuttgart | Braiding machine, in particular radial or spiral braiding machine |
CN103845096B (en) * | 2014-03-10 | 2016-05-04 | 上海形状记忆合金材料有限公司 | Left atrial appendage occlusion device and preparation method thereof |
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CN104042258B (en) * | 2014-05-05 | 2016-11-23 | 尚小珂 | Patent ductus arteriosus is boxed out stopper |
EP3193791B1 (en) * | 2014-09-09 | 2018-08-22 | Occlutech Holding AG | A flow regulating device in the heart |
US10820907B2 (en) * | 2014-09-12 | 2020-11-03 | Carag Ag | Occluder |
CN105615991B (en) * | 2014-11-05 | 2021-04-16 | 上海微创电生理医疗科技股份有限公司 | Ablation catheter |
JP6348052B2 (en) * | 2014-11-19 | 2018-06-27 | グンゼ株式会社 | Medical materials |
CN104605909A (en) * | 2014-12-30 | 2015-05-13 | 先健科技(深圳)有限公司 | Plugging device, manufacturing method for plugging device and woven mesh pipe for manufacturing plugging device |
GB2534194B (en) | 2015-01-16 | 2017-02-08 | Cook Medical Technologies Llc | Cone Expanding Collapsible Medical Device |
WO2017059406A1 (en) | 2015-10-01 | 2017-04-06 | Neochord, Inc. | Ringless web for repair of heart valves |
US10531866B2 (en) | 2016-02-16 | 2020-01-14 | Cardiovalve Ltd. | Techniques for providing a replacement valve and transseptal communication |
CN105907059B (en) * | 2016-04-29 | 2017-12-01 | 哈尔滨工业大学 | Plugging device and its methods for making and using same based on composite material of shape memory |
EP3478184A1 (en) | 2016-08-03 | 2019-05-08 | PI-Harvest Holding AG | A system and method for non-invasive measurement of pressure inside a body including intravascular blood pressure |
JP7199344B2 (en) * | 2016-08-15 | 2023-01-05 | ザ クリーヴランド クリニック ファウンデーション | Apparatus and method for at least partially supporting heart valve leaflets with regurgitation |
US20220031456A1 (en) * | 2016-08-15 | 2022-02-03 | The Cleveland Clinic Foundation | Apparatuses and methods for at least partially supporting a valve leaflet of a regurgitant heart valve |
CN106950280B (en) | 2017-03-16 | 2019-04-12 | 东北大学 | Fibre reinforced composites parameter identification method based on the lossless scanning of laser |
EP3459469A1 (en) | 2017-09-23 | 2019-03-27 | Universität Zürich | Medical occluder device |
EP3716868B8 (en) | 2017-11-30 | 2024-02-14 | Boston Scientific Scimed, Inc. | Delivery and occlusion devices for paravalvular leak |
CN109470556B (en) * | 2018-12-27 | 2020-11-10 | 北京航空航天大学 | Pressure conveying system for fatigue test of ventricular septal defect occluder |
DE102019100531B4 (en) | 2019-01-10 | 2021-08-19 | Qatna Medical GmbH | Occluder delivery system and delivery unit |
CN109550105B (en) * | 2019-01-27 | 2024-01-26 | 浙江百获健康科技有限公司 | Vein catheter device capable of plugging |
CN110251182A (en) * | 2019-06-14 | 2019-09-20 | 凯斯蒂南京医疗器械有限公司 | A kind of umbellate form tissue plug |
CN112535510B (en) * | 2020-12-25 | 2021-10-26 | 上海拓舜医疗科技有限公司 | Bronchus plugging device system with foam-shaped matrix memory alloy frame structure |
CN112773418B (en) * | 2020-12-31 | 2021-10-01 | 上海锦葵医疗器械股份有限公司 | Degradable heart foramen ovale closure device and manufacturing method thereof |
DE102021001416A1 (en) | 2021-03-17 | 2022-09-22 | Peter Osypka | Atrial Flow Regulator |
US11771411B2 (en) | 2021-12-22 | 2023-10-03 | Encore Medical, Inc. | PFO device |
CN115068064B (en) * | 2022-07-19 | 2023-01-03 | 深圳佰特微医疗科技有限公司 | Thrombus taking device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5944738A (en) * | 1998-02-06 | 1999-08-31 | Aga Medical Corporation | Percutaneous catheter directed constricting occlusion device |
US6506204B2 (en) * | 1996-01-24 | 2003-01-14 | Aga Medical Corporation | Method and apparatus for occluding aneurysms |
US6797083B2 (en) * | 2001-06-11 | 2004-09-28 | Ev3 Inc. | Method of training nitinol wire |
Family Cites Families (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE546967C (en) * | 1929-02-08 | 1932-03-19 | Paul Ascher | Circular braiding machine |
US4336809A (en) | 1980-03-17 | 1982-06-29 | Burleigh Instruments, Inc. | Human and animal tissue photoradiation system and method |
JPS587235A (en) | 1981-07-07 | 1983-01-17 | 住友電気工業株式会社 | Laser knife |
US4722337A (en) | 1983-08-22 | 1988-02-02 | Laserscope | Medical laser peripherals and connector system |
US5007704A (en) | 1983-10-28 | 1991-04-16 | Baxter International Inc. | Oximeter |
SU1331493A1 (en) * | 1985-03-25 | 1987-08-23 | Ташкентский государственный медицинский институт | Method of treatment of portal hypertension |
US4624243A (en) | 1985-04-08 | 1986-11-25 | American Hospital Supply Corp. | Endoscope having a reusable eyepiece and a disposable distal section |
GB8516999D0 (en) | 1985-07-04 | 1985-08-07 | Pilkington Medical Systems Ltd | Optical fibre assembly |
US4782819A (en) | 1987-02-25 | 1988-11-08 | Adair Edwin Lloyd | Optical catheter |
JPH01148840A (en) * | 1987-11-30 | 1989-06-12 | Agency Of Ind Science & Technol | Three-dimensional shaped fabric and its production |
JP2754067B2 (en) * | 1989-01-17 | 1998-05-20 | 日本ゼオン株式会社 | Medical body wall hole plugging jig |
SE469454B (en) | 1990-07-11 | 1993-07-05 | Radi Medical Systems | FIBEROPTICAL CONNECTION AND APPLICATION THEREOF |
US5304171A (en) | 1990-10-18 | 1994-04-19 | Gregory Kenton W | Catheter devices and methods for delivering |
US5395362A (en) | 1992-01-14 | 1995-03-07 | Summit Technology | Methods and apparatus for distributing laser radiation |
JP3393383B2 (en) * | 1992-01-21 | 2003-04-07 | リージェンツ オブ ザ ユニバーシティ オブ ミネソタ | Septal defect closure device |
US5382259A (en) * | 1992-10-26 | 1995-01-17 | Target Therapeutics, Inc. | Vasoocclusion coil with attached tubular woven or braided fibrous covering |
US5540678A (en) | 1992-12-31 | 1996-07-30 | Laser Centers Of America | Apparatus and method for efficiently transmitting optic energy from a reuseable optic element to a disposable optic element |
EP0666065A1 (en) * | 1994-02-02 | 1995-08-09 | Katsushi Mori | Stent for biliary, urinary or vascular system |
US5725552A (en) † | 1994-07-08 | 1998-03-10 | Aga Medical Corporation | Percutaneous catheter directed intravascular occlusion devices |
US6123715A (en) † | 1994-07-08 | 2000-09-26 | Amplatz; Curtis | Method of forming medical devices; intravascular occlusion devices |
US5846261A (en) * | 1994-07-08 | 1998-12-08 | Aga Medical Corp. | Percutaneous catheter directed occlusion devices |
US5825958A (en) | 1996-01-25 | 1998-10-20 | Pharos Optics, Inc. | Fiber optic delivery system for infrared lasers |
US5872879A (en) | 1996-11-25 | 1999-02-16 | Boston Scientific Corporation | Rotatable connecting optical fibers |
US6095970A (en) | 1997-02-19 | 2000-08-01 | Asahi Kogaku Kogyo Kabushiki Kaisha | Endoscope |
US6228086B1 (en) | 1997-03-19 | 2001-05-08 | Stryker Trauma-Selzach Ag | Modular intramedullary nail |
AU6784598A (en) * | 1997-04-23 | 1998-11-13 | Vascular Science Inc. | Medical plug |
US6086577A (en) * | 1997-08-13 | 2000-07-11 | Scimed Life Systems, Inc. | Detachable aneurysm neck bridge (III) |
US6475227B2 (en) † | 1997-12-24 | 2002-11-05 | Scimed Life Systems, Inc. | Vaso-occlusion apparatus having a mechanically expandable detachment joint and a method for using the apparatus |
US5925060A (en) | 1998-03-13 | 1999-07-20 | B. Braun Celsa | Covered self-expanding vascular occlusion device |
US6656218B1 (en) * | 1998-07-24 | 2003-12-02 | Micrus Corporation | Intravascular flow modifier and reinforcement device |
DE19843822A1 (en) * | 1998-09-24 | 2000-03-30 | Impag Gmbh Medizintechnik | Device for producing a stent |
US7044134B2 (en) * | 1999-11-08 | 2006-05-16 | Ev3 Sunnyvale, Inc | Method of implanting a device in the left atrial appendage |
DE19925323A1 (en) | 1999-06-02 | 2000-12-14 | Winter & Ibe Olympus | Electronic endoscope with detachable shaft, to enable easier changing of shaft length, with shaft change accomplished by use of mechanical and optical fiber couplings |
US6964674B1 (en) * | 1999-09-20 | 2005-11-15 | Nuvasive, Inc. | Annulotomy closure device |
US6346117B1 (en) | 2000-03-02 | 2002-02-12 | Prodesco, Inc. | Bag for use in the intravascular treatment of saccular aneurysms |
US6468303B1 (en) † | 2000-03-27 | 2002-10-22 | Aga Medical Corporation | Retrievable self expanding shunt |
US6214029B1 (en) * | 2000-04-26 | 2001-04-10 | Microvena Corporation | Septal defect occluder |
US6334864B1 (en) * | 2000-05-17 | 2002-01-01 | Aga Medical Corp. | Alignment member for delivering a non-symmetric device with a predefined orientation |
CN2464273Y (en) † | 2001-01-18 | 2001-12-12 | 康云帆 | Cardiac partition defect reparing support |
CN2524710Y (en) * | 2001-12-27 | 2002-12-11 | 龚善石 | New cardiac atrial septal defect blocking device |
US20040172056A1 (en) * | 2002-07-12 | 2004-09-02 | Guterman Lee R. | Bifurcated aneurysm buttress arrangement |
CA2495466A1 (en) | 2002-08-05 | 2004-02-12 | Miravant Medical Technologies, Inc. | Catheter for diagnosis and treatment of diseased vessels |
US7001425B2 (en) * | 2002-11-15 | 2006-02-21 | Scimed Life Systems, Inc. | Braided stent method for its manufacture |
DE10362223B4 (en) * | 2003-01-21 | 2010-02-04 | pfm Produkte für die Medizin AG | Basic coil shape |
CN2613248Y (en) † | 2003-03-21 | 2004-04-28 | 龚善石 | Ventricular septel defect block device |
DE10338702B9 (en) † | 2003-08-22 | 2007-04-26 | Occlutech Gmbh | Occlusioninstrument |
US20050228434A1 (en) † | 2004-03-19 | 2005-10-13 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects |
CN100496431C (en) * | 2004-08-19 | 2009-06-10 | 龚善石 | Stopper for congenital heart structural defect, its manufacturing method |
US7955354B2 (en) * | 2005-11-14 | 2011-06-07 | Occlutech Gmbh | Occlusion device and surgical instrument and method for its implantation/explantation |
DE102006013770A1 (en) * | 2006-03-24 | 2007-09-27 | Occlutech Gmbh | Occlusion instrument and method for its production |
EP2460476B1 (en) * | 2007-04-16 | 2020-11-25 | Occlutech Holding AG | Occluder for closing a cardiac auricle and manufacturing method therefor |
EP1992371A1 (en) * | 2007-05-15 | 2008-11-19 | Occlutech GmbH | Bio reabsorbable polymer materials opaque to X-rays and occlusion instruments made thereof |
-
2006
- 2006-03-24 DE DE102006013770A patent/DE102006013770A1/en not_active Withdrawn
-
2007
- 2007-03-22 EP EP09169783.9A patent/EP2266465B2/en active Active
- 2007-03-22 AT AT07723515T patent/ATE442086T1/en active
- 2007-03-22 AU AU2007229688A patent/AU2007229688B2/en not_active Ceased
- 2007-03-22 ES ES09169783.9T patent/ES2484916T3/en active Active
- 2007-03-22 EP EP11164489.4A patent/EP2389871A3/en not_active Withdrawn
- 2007-03-22 EP EP07723515.8A patent/EP1998686B2/en active Active
- 2007-03-22 EP EP11164488A patent/EP2389870A3/en not_active Withdrawn
- 2007-03-22 BR BRPI0709068A patent/BRPI0709068B8/en active IP Right Grant
- 2007-03-22 US US11/689,550 patent/US20070225760A1/en not_active Abandoned
- 2007-03-22 ES ES07723515T patent/ES2330389T3/en active Active
- 2007-03-22 EP EP11164492A patent/EP2389872A3/en not_active Withdrawn
- 2007-03-22 RU RU2008141994/14A patent/RU2465846C2/en not_active IP Right Cessation
- 2007-03-22 ES ES11164487T patent/ES2658174T5/en active Active
- 2007-03-22 DE DE502007001496T patent/DE502007001496D1/en active Active
- 2007-03-22 WO PCT/EP2007/002563 patent/WO2007110195A1/en active Application Filing
- 2007-03-22 DK DK07723515T patent/DK1998686T3/en active
- 2007-03-22 CN CN201010623796.8A patent/CN102166124B/en active Active
- 2007-03-22 CN CN2007800104367A patent/CN101410064B/en active Active
- 2007-03-22 KR KR1020087025822A patent/KR101453572B1/en not_active IP Right Cessation
- 2007-03-22 JP JP2009500777A patent/JP5302880B2/en active Active
- 2007-03-22 EP EP11164487.8A patent/EP2422709B2/en active Active
- 2007-03-22 EP EP11164485.2A patent/EP2389869A3/en not_active Withdrawn
- 2007-03-23 CA CA002582693A patent/CA2582693A1/en not_active Abandoned
-
2008
- 2008-09-16 EC EC2008008742A patent/ECSP088742A/en unknown
- 2008-10-22 ZA ZA200809041A patent/ZA200809041B/en unknown
-
2009
- 2009-10-15 HK HK09109524.7A patent/HK1129557A1/en not_active IP Right Cessation
-
2010
- 2010-07-26 US US12/843,788 patent/US9532772B2/en active Active
-
2016
- 2016-11-21 US US15/357,394 patent/US10743852B2/en active Active
-
2020
- 2020-01-16 US US16/745,209 patent/US11751858B2/en active Active
-
2023
- 2023-08-02 US US18/364,432 patent/US20240016488A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6506204B2 (en) * | 1996-01-24 | 2003-01-14 | Aga Medical Corporation | Method and apparatus for occluding aneurysms |
US5944738A (en) * | 1998-02-06 | 1999-08-31 | Aga Medical Corporation | Percutaneous catheter directed constricting occlusion device |
US6797083B2 (en) * | 2001-06-11 | 2004-09-28 | Ev3 Inc. | Method of training nitinol wire |
Cited By (270)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11375988B2 (en) | 2003-07-14 | 2022-07-05 | W. L. Gore & Associates, Inc. | Patent foramen ovale (PFO) closure device with linearly elongating petals |
US9877710B2 (en) | 2004-03-19 | 2018-01-30 | St. Jude Medical, Cardiology Division, Inc. | Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body |
US20060241690A1 (en) * | 2004-03-19 | 2006-10-26 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body |
US8777974B2 (en) | 2004-03-19 | 2014-07-15 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects |
US9445799B2 (en) | 2004-03-19 | 2016-09-20 | St. Jude Medical, Cardiology Division, Inc. | Multi-layer braided structures for occluding vascular defects |
US9445798B2 (en) | 2004-03-19 | 2016-09-20 | St. Jude Medical, Cardiology Division, Inc. | Multi-layer braided structures for occluding vascular defects |
US11134933B2 (en) | 2004-03-19 | 2021-10-05 | St. Jude Medical, Cardiology Division, Inc. | Multi-layer braided structures for occluding vascular defects |
US9039724B2 (en) | 2004-03-19 | 2015-05-26 | Aga Medical Corporation | Device for occluding vascular defects |
US8398670B2 (en) | 2004-03-19 | 2013-03-19 | Aga Medical Corporation | Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body |
US10624619B2 (en) | 2004-03-19 | 2020-04-21 | St. Jude Medical, Cardiology Division, Inc. | Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body |
US9295568B2 (en) | 2004-05-25 | 2016-03-29 | Covidien Lp | Methods and apparatus for luminal stenting |
US9801744B2 (en) | 2004-05-25 | 2017-10-31 | Covidien Lp | Methods and apparatus for luminal stenting |
US10004618B2 (en) | 2004-05-25 | 2018-06-26 | Covidien Lp | Methods and apparatus for luminal stenting |
US9855047B2 (en) | 2004-05-25 | 2018-01-02 | Covidien Lp | Flexible vascular occluding device |
US10918389B2 (en) | 2004-05-25 | 2021-02-16 | Covidien Lp | Flexible vascular occluding device |
US9125659B2 (en) | 2004-05-25 | 2015-09-08 | Covidien Lp | Flexible vascular occluding device |
US8623067B2 (en) | 2004-05-25 | 2014-01-07 | Covidien Lp | Methods and apparatus for luminal stenting |
US11771433B2 (en) | 2004-05-25 | 2023-10-03 | Covidien Lp | Flexible vascular occluding device |
US8617234B2 (en) | 2004-05-25 | 2013-12-31 | Covidien Lp | Flexible vascular occluding device |
US9393021B2 (en) | 2004-05-25 | 2016-07-19 | Covidien Lp | Flexible vascular occluding device |
US8382825B2 (en) | 2004-05-25 | 2013-02-26 | Covidien Lp | Flexible vascular occluding device |
US8628564B2 (en) | 2004-05-25 | 2014-01-14 | Covidien Lp | Methods and apparatus for luminal stenting |
US9050205B2 (en) | 2004-05-25 | 2015-06-09 | Covidien Lp | Methods and apparatus for luminal stenting |
US8398701B2 (en) | 2004-05-25 | 2013-03-19 | Covidien Lp | Flexible vascular occluding device |
US10765542B2 (en) | 2004-05-25 | 2020-09-08 | Covidien Lp | Methods and apparatus for luminal stenting |
US10064747B2 (en) | 2005-05-25 | 2018-09-04 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US8273101B2 (en) | 2005-05-25 | 2012-09-25 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US10322018B2 (en) | 2005-05-25 | 2019-06-18 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US9095343B2 (en) | 2005-05-25 | 2015-08-04 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US9198666B2 (en) | 2005-05-25 | 2015-12-01 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US8147534B2 (en) | 2005-05-25 | 2012-04-03 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US20060271153A1 (en) * | 2005-05-25 | 2006-11-30 | Chestnut Medical Technologies, Inc. | System and method for delivering and deploying an occluding device within a vessel |
US9204983B2 (en) | 2005-05-25 | 2015-12-08 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US8236042B2 (en) | 2005-05-25 | 2012-08-07 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US20090192536A1 (en) * | 2005-05-25 | 2009-07-30 | Chestnut Medical Technologies, Inc. | System and method for delivering and deploying an occluding device within a vessel |
US9381104B2 (en) | 2005-05-25 | 2016-07-05 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US8257421B2 (en) | 2005-05-25 | 2012-09-04 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US8267985B2 (en) | 2005-05-25 | 2012-09-18 | Tyco Healthcare Group Lp | System and method for delivering and deploying an occluding device within a vessel |
US11382777B2 (en) | 2006-02-22 | 2022-07-12 | Covidien Lp | Stents having radiopaque mesh |
US10433988B2 (en) | 2006-02-22 | 2019-10-08 | Covidien Lp | Stents having radiopaque mesh |
US9610181B2 (en) | 2006-02-22 | 2017-04-04 | Covidien Lp | Stents having radiopaque mesh |
US8394119B2 (en) | 2006-02-22 | 2013-03-12 | Covidien Lp | Stents having radiopaque mesh |
US9320590B2 (en) | 2006-02-22 | 2016-04-26 | Covidien Lp | Stents having radiopaque mesh |
US10743852B2 (en) | 2006-03-24 | 2020-08-18 | Occlutech Holding Ag | Occlusion device and method for its manufacture |
US11751858B2 (en) | 2006-03-24 | 2023-09-12 | Occlutech Gmbh | Occlusion device and method for its manufacture |
US9532772B2 (en) | 2006-03-24 | 2017-01-03 | Occlutech Holding Ag | Occlusion device and method for its manufacture |
US20080221600A1 (en) * | 2006-08-17 | 2008-09-11 | Dieck Martin S | Isolation devices for the treatment of aneurysms |
US10485525B2 (en) | 2007-04-05 | 2019-11-26 | W.L. Gore & Associates, Inc. | Septal closure device with centering mechanism |
US9949728B2 (en) | 2007-04-05 | 2018-04-24 | W.L. Gore & Associates, Inc. | Septal closure device with centering mechanism |
EP2526875A2 (en) | 2007-04-16 | 2012-11-28 | Occlutech Holding AG | Occluder for occluding an atrial appendage |
US20160015397A1 (en) * | 2007-04-16 | 2016-01-21 | Occlutech Holding Ag | Occluder For Occluding An Atrial Appendage And Production Process Therefor |
US9826980B2 (en) * | 2007-04-16 | 2017-11-28 | Occlutech Holding Ag | Occluder for occluding an atrial appendage and production process therefor |
EP2581045A2 (en) | 2007-04-16 | 2013-04-17 | Occlutech Holding AG | Occluder and production process therefor |
US9161758B2 (en) * | 2007-04-16 | 2015-10-20 | Occlutech Holding Ag | Occluder for occluding an atrial appendage and production process therefor |
US20120271337A1 (en) * | 2007-04-16 | 2012-10-25 | Hans-Reiner Figulla | Occluder For Occluding an Atrial Appendage and Production Process Therefor |
US9259337B2 (en) | 2007-06-04 | 2016-02-16 | Sequent Medical, Inc. | Methods and devices for treatment of vascular defects |
US11179159B2 (en) | 2007-06-04 | 2021-11-23 | Sequent Medical, Inc. | Methods and devices for treatment of vascular defects |
US20090210048A1 (en) * | 2008-02-18 | 2009-08-20 | Aga Medical Corporation | Stent/stent graft for reinforcement of vascular abnormalities and associated method |
US8747453B2 (en) | 2008-02-18 | 2014-06-10 | Aga Medical Corporation | Stent/stent graft for reinforcement of vascular abnormalities and associated method |
US10278705B2 (en) | 2008-03-07 | 2019-05-07 | W. L. Gore & Associates, Inc. | Heart occlusion devices |
US9474517B2 (en) | 2008-03-07 | 2016-10-25 | W. L. Gore & Associates, Inc. | Heart occlusion devices |
US11844528B2 (en) | 2008-04-21 | 2023-12-19 | Covidien Lp | Multiple layer filamentary devices for treatment of vascular defects |
US8747597B2 (en) | 2008-04-21 | 2014-06-10 | Covidien Lp | Methods for making braid-ball occlusion devices |
US8696701B2 (en) | 2008-04-21 | 2014-04-15 | Covidien Lp | Braid-ball embolic devices |
US9585669B2 (en) | 2008-04-21 | 2017-03-07 | Covidien Lp | Multiple layer filamentary devices for treatment of vascular defects |
US8142456B2 (en) | 2008-04-21 | 2012-03-27 | Nfocus Neuromedical, Inc. | Braid-ball embolic devices |
US9039726B2 (en) | 2008-04-21 | 2015-05-26 | Covidien Lp | Filamentary devices for treatment of vascular defects |
US10610231B2 (en) | 2008-05-02 | 2020-04-07 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US20150105817A1 (en) * | 2008-05-02 | 2015-04-16 | Sequent Medical Inc. | Filamentary devices for treatment of vascular defects |
US9597087B2 (en) | 2008-05-02 | 2017-03-21 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US20150150563A1 (en) * | 2008-05-02 | 2015-06-04 | Sequent Medical Inc. | Filamentary devices for treatment of vascular defects |
US9675482B2 (en) | 2008-05-13 | 2017-06-13 | Covidien Lp | Braid implant delivery systems |
US10610389B2 (en) | 2008-05-13 | 2020-04-07 | Covidien Lp | Braid implant delivery systems |
US11707371B2 (en) | 2008-05-13 | 2023-07-25 | Covidien Lp | Braid implant delivery systems |
US9179918B2 (en) | 2008-07-22 | 2015-11-10 | Covidien Lp | Vascular remodeling device |
WO2010011446A1 (en) * | 2008-07-24 | 2010-01-28 | Aga Medical Corporation | Multi-layered medical device for treating target site and associated method |
US20100023048A1 (en) * | 2008-07-24 | 2010-01-28 | Aga Medical Corporation | Multi-layered medical device for treating a target site and associated method |
US9351715B2 (en) | 2008-07-24 | 2016-05-31 | St. Jude Medical, Cardiology Division, Inc. | Multi-layered medical device for treating a target site and associated method |
US20100121370A1 (en) * | 2008-11-11 | 2010-05-13 | Aga Medical Corporation | Asymmetrical medical devices for treating a target site and associated method |
WO2010056616A1 (en) * | 2008-11-11 | 2010-05-20 | Aga Medical Corporation | Asymmetrical medical devices for treating a target site and associated method |
US8940015B2 (en) | 2008-11-11 | 2015-01-27 | Aga Medical Corporation | Asymmetrical medical devices for treating a target site and associated method |
US8636760B2 (en) | 2009-04-20 | 2014-01-28 | Covidien Lp | System and method for delivering and deploying an occluding device within a vessel |
US10806437B2 (en) | 2009-06-22 | 2020-10-20 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US11564672B2 (en) | 2009-06-22 | 2023-01-31 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US9381006B2 (en) * | 2009-06-22 | 2016-07-05 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US11589853B2 (en) * | 2009-06-22 | 2023-02-28 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US10792025B2 (en) | 2009-06-22 | 2020-10-06 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US9451939B2 (en) | 2009-06-22 | 2016-09-27 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US9636094B2 (en) | 2009-06-22 | 2017-05-02 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US20130218202A1 (en) * | 2009-06-22 | 2013-08-22 | W.L. Gore & Associates, Inc. | Sealing Device and Delivery System |
US11596391B2 (en) | 2009-06-22 | 2023-03-07 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US20120143242A1 (en) * | 2009-06-22 | 2012-06-07 | Masters Steven J | Sealing Device and Delivery System |
US9918720B2 (en) | 2009-11-05 | 2018-03-20 | Sequent Medical Inc. | Multiple layer filamentary devices for treatment of vascular defects |
US9095342B2 (en) | 2009-11-09 | 2015-08-04 | Covidien Lp | Braid ball embolic device features |
US11141268B2 (en) | 2009-12-08 | 2021-10-12 | Cardiovalve Ltd. | Prosthetic heart valve with upper and lower skirts |
US11839541B2 (en) | 2009-12-08 | 2023-12-12 | Cardiovalve Ltd. | Prosthetic heart valve with upper skirt |
US10660751B2 (en) | 2009-12-08 | 2020-05-26 | Cardiovalve Ltd. | Prosthetic heart valve with upper skirt |
US11351026B2 (en) | 2009-12-08 | 2022-06-07 | Cardiovalve Ltd. | Rotation-based anchoring of an implant |
US10548726B2 (en) | 2009-12-08 | 2020-02-04 | Cardiovalve Ltd. | Rotation-based anchoring of an implant |
US10231831B2 (en) | 2009-12-08 | 2019-03-19 | Cardiovalve Ltd. | Folding ring implant for heart valve |
US8870950B2 (en) | 2009-12-08 | 2014-10-28 | Mitral Tech Ltd. | Rotation-based anchoring of an implant |
US10610359B2 (en) | 2009-12-08 | 2020-04-07 | Cardiovalve Ltd. | Folding ring prosthetic heart valve |
US20110144689A1 (en) * | 2009-12-15 | 2011-06-16 | Med Institute, Inc. | Occlusion Device |
US8926681B2 (en) | 2010-01-28 | 2015-01-06 | Covidien Lp | Vascular remodeling device |
US9468442B2 (en) | 2010-01-28 | 2016-10-18 | Covidien Lp | Vascular remodeling device |
US11109964B2 (en) | 2010-03-10 | 2021-09-07 | Cardiovalve Ltd. | Axially-shortening prosthetic valve |
US20180049731A1 (en) * | 2010-04-29 | 2018-02-22 | Muffin Incorporated | Closing device for tissue openings |
EP2575630A1 (en) | 2010-05-23 | 2013-04-10 | Occlutech Holding AG | Medical implant and manufacturing method thereof |
US10808341B2 (en) | 2010-05-23 | 2020-10-20 | Occlutech Holding Ag | Braided medical device and manufacturing method thereof |
US11840779B2 (en) | 2010-05-23 | 2023-12-12 | Occlutech Gmbh | Braided medical device and manufacturing method thereof |
US9271736B2 (en) * | 2010-05-23 | 2016-03-01 | Occlutech Holding Ag | Braided medical device and manufacturing method thereof |
US20140012303A1 (en) * | 2010-05-23 | 2014-01-09 | Occlutech Holding Ag | Braided Medical Device And Manufacturing Method Thereof |
US10156030B2 (en) | 2010-05-23 | 2018-12-18 | Occlutech Holding Ag | Braided medical device and manufacturing method thereof |
US11512416B2 (en) | 2010-05-23 | 2022-11-29 | Occlutech Holding Ag | Braided medical device and manufacturing method thereof |
US11426155B2 (en) | 2010-07-21 | 2022-08-30 | Cardiovalve Ltd. | Helical anchor implantation |
US10925595B2 (en) | 2010-07-21 | 2021-02-23 | Cardiovalve Ltd. | Valve prosthesis configured for deployment in annular spacer |
US10531872B2 (en) | 2010-07-21 | 2020-01-14 | Cardiovalve Ltd. | Valve prosthesis configured for deployment in annular spacer |
US11653910B2 (en) | 2010-07-21 | 2023-05-23 | Cardiovalve Ltd. | Helical anchor implantation |
US9763657B2 (en) | 2010-07-21 | 2017-09-19 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US8992604B2 (en) | 2010-07-21 | 2015-03-31 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US9017399B2 (en) | 2010-07-21 | 2015-04-28 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US10512456B2 (en) | 2010-07-21 | 2019-12-24 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US9132009B2 (en) | 2010-07-21 | 2015-09-15 | Mitraltech Ltd. | Guide wires with commissural anchors to advance a prosthetic valve |
EP2617386A1 (en) * | 2010-09-16 | 2013-07-24 | Lifetech Scientific (Shenzhen) Co., Ltd. | Occlusion device and method for its manufacture |
EP2617386A4 (en) * | 2010-09-16 | 2015-12-16 | Lifetech Scient Shenzhen Co | Occlusion device and method for its manufacture |
US9393022B2 (en) | 2011-02-11 | 2016-07-19 | Covidien Lp | Two-stage deployment aneurysm embolization devices |
US9089332B2 (en) | 2011-03-25 | 2015-07-28 | Covidien Lp | Vascular remodeling device |
US11147563B2 (en) | 2011-03-25 | 2021-10-19 | Covidien Lp | Vascular remodeling device |
US10004511B2 (en) | 2011-03-25 | 2018-06-26 | Covidien Lp | Vascular remodeling device |
US10702385B2 (en) | 2011-08-05 | 2020-07-07 | Cardiovalve Ltd. | Implant for heart valve |
US11291547B2 (en) | 2011-08-05 | 2022-04-05 | Cardiovalve Ltd. | Leaflet clip with collars |
US11690712B2 (en) | 2011-08-05 | 2023-07-04 | Cardiovalve Ltd. | Clip-secured implant for heart valve |
US11369469B2 (en) | 2011-08-05 | 2022-06-28 | Cardiovalve Ltd. | Method for use at a heart valve |
US10226341B2 (en) | 2011-08-05 | 2019-03-12 | Cardiovalve Ltd. | Implant for heart valve |
US11291545B2 (en) | 2011-08-05 | 2022-04-05 | Cardiovalve Ltd. | Implant for heart valve |
US10245143B2 (en) | 2011-08-05 | 2019-04-02 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US11291546B2 (en) | 2011-08-05 | 2022-04-05 | Cardiovalve Ltd. | Leaflet clip with collars |
US11864995B2 (en) | 2011-08-05 | 2024-01-09 | Cardiovalve Ltd. | Implant for heart valve |
US10695173B2 (en) | 2011-08-05 | 2020-06-30 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US9387078B2 (en) | 2011-08-05 | 2016-07-12 | Mitraltech Ltd. | Percutaneous mitral valve replacement and sealing |
US11344410B2 (en) | 2011-08-05 | 2022-05-31 | Cardiovalve Ltd. | Implant for heart valve |
US11517429B2 (en) | 2011-08-05 | 2022-12-06 | Cardiovalve Ltd. | Apparatus for use at a heart valve |
US8852272B2 (en) * | 2011-08-05 | 2014-10-07 | Mitraltech Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US10376361B2 (en) | 2011-08-05 | 2019-08-13 | Cardiovalve Ltd. | Techniques for percutaneous mitral valve replacement and sealing |
US11517436B2 (en) | 2011-08-05 | 2022-12-06 | Cardiovalve Ltd. | Implant for heart valve |
US9770232B2 (en) | 2011-08-12 | 2017-09-26 | W. L. Gore & Associates, Inc. | Heart occlusion devices |
US10828182B2 (en) | 2011-09-29 | 2020-11-10 | Covidien Lp | Vascular remodeling device |
US9060886B2 (en) | 2011-09-29 | 2015-06-23 | Covidien Lp | Vascular remodeling device |
US11654037B2 (en) | 2011-09-29 | 2023-05-23 | Covidien Lp | Vascular remodeling device |
US11352724B2 (en) | 2011-10-17 | 2022-06-07 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US10907283B2 (en) | 2011-10-17 | 2021-02-02 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US8820207B2 (en) | 2011-10-17 | 2014-09-02 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US8826791B2 (en) | 2011-10-17 | 2014-09-09 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US8430012B1 (en) | 2011-10-17 | 2013-04-30 | Sequent Medical Inc. | Braiding mechanism and methods of use |
US10260182B2 (en) | 2011-10-17 | 2019-04-16 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US9631303B2 (en) | 2011-10-17 | 2017-04-25 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US11885053B2 (en) | 2011-10-17 | 2024-01-30 | Microvention, Inc. | Braiding mechanism and methods of use |
US9528205B2 (en) | 2011-10-17 | 2016-12-27 | Sequent Medical, Inc | Braiding mechanism and methods of use |
US8833224B2 (en) | 2011-10-17 | 2014-09-16 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US10260183B2 (en) | 2011-10-17 | 2019-04-16 | Sequent Medical, Inc. | Braiding mechanism and methods of use |
US8261648B1 (en) | 2011-10-17 | 2012-09-11 | Sequent Medical Inc. | Braiding mechanism and methods of use |
US9155647B2 (en) | 2012-07-18 | 2015-10-13 | Covidien Lp | Methods and apparatus for luminal stenting |
US9877856B2 (en) | 2012-07-18 | 2018-01-30 | Covidien Lp | Methods and apparatus for luminal stenting |
US9907643B2 (en) | 2012-10-30 | 2018-03-06 | Covidien Lp | Systems for attaining a predetermined porosity of a vascular device |
US9114001B2 (en) | 2012-10-30 | 2015-08-25 | Covidien Lp | Systems for attaining a predetermined porosity of a vascular device |
US9301831B2 (en) | 2012-10-30 | 2016-04-05 | Covidien Lp | Methods for attaining a predetermined porosity of a vascular device |
US9452070B2 (en) | 2012-10-31 | 2016-09-27 | Covidien Lp | Methods and systems for increasing a density of a region of a vascular device |
US10206798B2 (en) | 2012-10-31 | 2019-02-19 | Covidien Lp | Methods and systems for increasing a density of a region of a vascular device |
US10952878B2 (en) | 2012-10-31 | 2021-03-23 | Covidien Lp | Methods and systems for increasing a density of a region of a vascular device |
US9924959B2 (en) | 2012-11-06 | 2018-03-27 | Covidien Lp | Multi-pivot thrombectomy device |
US9314248B2 (en) | 2012-11-06 | 2016-04-19 | Covidien Lp | Multi-pivot thrombectomy device |
US11406405B2 (en) | 2012-11-06 | 2022-08-09 | Covidien Lp | Multi-pivot thrombectomy device |
US9943427B2 (en) | 2012-11-06 | 2018-04-17 | Covidien Lp | Shaped occluding devices and methods of using the same |
US9295571B2 (en) | 2013-01-17 | 2016-03-29 | Covidien Lp | Methods and apparatus for luminal stenting |
US9901472B2 (en) | 2013-01-17 | 2018-02-27 | Covidien Lp | Methods and apparatus for luminal stenting |
US11771408B2 (en) | 2013-01-18 | 2023-10-03 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US20140207185A1 (en) * | 2013-01-18 | 2014-07-24 | W.L. Gore & Associates, Inc. | Sealing Device and Delivery System |
US10828019B2 (en) * | 2013-01-18 | 2020-11-10 | W.L. Gore & Associates, Inc. | Sealing device and delivery system |
US11135059B2 (en) | 2013-01-24 | 2021-10-05 | Cardiovalve Ltd. | Prosthetic valve and upstream support therefor |
US10631982B2 (en) | 2013-01-24 | 2020-04-28 | Cardiovale Ltd. | Prosthetic valve and upstream support therefor |
US11844691B2 (en) | 2013-01-24 | 2023-12-19 | Cardiovalve Ltd. | Partially-covered prosthetic valves |
US10835377B2 (en) | 2013-01-24 | 2020-11-17 | Cardiovalve Ltd. | Rolled prosthetic valve support |
US9681952B2 (en) | 2013-01-24 | 2017-06-20 | Mitraltech Ltd. | Anchoring of prosthetic valve supports |
US9561122B2 (en) | 2013-02-05 | 2017-02-07 | Covidien Lp | Vascular device for aneurysm treatment and providing blood flow into a perforator vessel |
US9157174B2 (en) | 2013-02-05 | 2015-10-13 | Covidien Lp | Vascular device for aneurysm treatment and providing blood flow into a perforator vessel |
US9463105B2 (en) | 2013-03-14 | 2016-10-11 | Covidien Lp | Methods and apparatus for luminal stenting |
US10736758B2 (en) | 2013-03-15 | 2020-08-11 | Covidien | Occlusive device |
US11389309B2 (en) | 2013-03-15 | 2022-07-19 | Covidien Lp | Occlusive device |
US9198670B2 (en) | 2013-08-16 | 2015-12-01 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US10136896B2 (en) | 2013-08-16 | 2018-11-27 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US9492174B2 (en) | 2013-08-16 | 2016-11-15 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US9078658B2 (en) | 2013-08-16 | 2015-07-14 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US11723667B2 (en) | 2013-08-16 | 2023-08-15 | Microvention, Inc. | Filamentary devices for treatment of vascular defects |
US10813645B2 (en) | 2013-08-16 | 2020-10-27 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US9295473B2 (en) | 2013-08-16 | 2016-03-29 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US9955976B2 (en) | 2013-08-16 | 2018-05-01 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US10939914B2 (en) | 2013-08-16 | 2021-03-09 | Sequent Medical, Inc. | Filamentary devices for the treatment of vascular defects |
CN104905890A (en) * | 2014-03-14 | 2015-09-16 | 徐州亚太科技有限公司 | Novel degradable stopper implanted through guide pipe and conveying system of novel degradable stopper |
US9629635B2 (en) | 2014-04-14 | 2017-04-25 | Sequent Medical, Inc. | Devices for therapeutic vascular procedures |
US11678886B2 (en) | 2014-04-14 | 2023-06-20 | Microvention, Inc. | Devices for therapeutic vascular procedures |
US11389174B2 (en) | 2014-04-30 | 2022-07-19 | Cerus Endovascular Limited | Occlusion device |
US11284901B2 (en) | 2014-04-30 | 2022-03-29 | Cerus Endovascular Limited | Occlusion device |
US9808230B2 (en) | 2014-06-06 | 2017-11-07 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US11298116B2 (en) | 2014-06-06 | 2022-04-12 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US10368853B2 (en) | 2014-06-06 | 2019-08-06 | W. L. Gore & Associates, Inc. | Sealing device and delivery system |
US11701225B2 (en) | 2014-07-30 | 2023-07-18 | Cardiovalve Ltd. | Delivery of a prosthetic valve |
US11872130B2 (en) | 2014-07-30 | 2024-01-16 | Cardiovalve Ltd. | Prosthetic heart valve implant |
US10492908B2 (en) | 2014-07-30 | 2019-12-03 | Cardiovalve Ltd. | Anchoring of a prosthetic valve |
US10667908B2 (en) | 2015-02-05 | 2020-06-02 | Cardiovalve Ltd. | Prosthetic valve with S-shaped tissue anchors |
US10449047B2 (en) | 2015-02-05 | 2019-10-22 | Cardiovalve Ltd. | Prosthetic heart valve with compressible frames |
US11793635B2 (en) | 2015-02-05 | 2023-10-24 | Cardiovalve Ltd. | Prosthetic valve with angularly offset frames |
US10888422B2 (en) | 2015-02-05 | 2021-01-12 | Cardiovalve Ltd. | Prosthetic valve with flexible tissue anchor portions |
US10682227B2 (en) | 2015-02-05 | 2020-06-16 | Cardiovalve Ltd. | Prosthetic valve with pivoting tissue anchor portions |
US9974651B2 (en) | 2015-02-05 | 2018-05-22 | Mitral Tech Ltd. | Prosthetic valve with axially-sliding frames |
US10864078B2 (en) | 2015-02-05 | 2020-12-15 | Cardiovalve Ltd. | Prosthetic valve with separably-deployable valve body and tissue anchors |
US10973636B2 (en) | 2015-02-05 | 2021-04-13 | Cardiovalve Ltd. | Prosthetic valve with tissue anchors free from lateral interconnections |
US11793638B2 (en) | 2015-02-05 | 2023-10-24 | Cardiovalve Ltd. | Prosthetic valve with pivoting tissue anchor portions |
US10524903B2 (en) | 2015-02-05 | 2020-01-07 | Cardiovalve Ltd. | Prosthetic valve with aligned inner and outer frames |
US10695177B2 (en) | 2015-02-05 | 2020-06-30 | Cardiovalve Ltd. | Prosthetic valve with aligned inner and outer frames |
US10507105B2 (en) | 2015-02-05 | 2019-12-17 | Cardiovalve Ltd. | Prosthetic valve with tissue anchors free from lateral interconnections |
US10758344B2 (en) | 2015-02-05 | 2020-09-01 | Cardiovalve Ltd. | Prosthetic valve with angularly offset frames |
US10736742B2 (en) | 2015-02-05 | 2020-08-11 | Cardiovalve Ltd. | Prosthetic valve with atrial arms |
US10722360B2 (en) | 2015-02-05 | 2020-07-28 | Cardiovalve Ltd. | Prosthetic valve with radially-deflectable tissue anchors |
US11801135B2 (en) | 2015-02-05 | 2023-10-31 | Cardiovalve Ltd. | Techniques for deployment of a prosthetic valve |
US11672658B2 (en) | 2015-02-05 | 2023-06-13 | Cardiovalve Ltd. | Prosthetic valve with aligned inner and outer frames |
US10918481B2 (en) | 2015-02-05 | 2021-02-16 | Cardiovalve Ltd. | Techniques for deployment of a prosthetic valve |
US10463487B2 (en) | 2015-02-05 | 2019-11-05 | Cardiovalve Ltd. | Prosthetic valve delivery system with independently-movable capsule portions |
US10463488B2 (en) | 2015-02-05 | 2019-11-05 | Cardiovalve Ltd. | Prosthetic valve with separably-deployable valve body and tissue anchors |
US10849748B2 (en) | 2015-02-05 | 2020-12-01 | Cardiovalve Ltd. | Prosthetic valve delivery system with independently-movable capsule portions |
US11534298B2 (en) | 2015-02-05 | 2022-12-27 | Cardiovalve Ltd. | Prosthetic valve with s-shaped tissue anchors |
US10357360B2 (en) | 2015-02-05 | 2019-07-23 | Cardiovalve Ltd. | Prosthetic valve with aligned inner and outer frames |
US10426610B2 (en) | 2015-02-05 | 2019-10-01 | Cardiovalve Ltd. | Prosthetic valve with radially-deflectable tissue anchors |
US10390952B2 (en) | 2015-02-05 | 2019-08-27 | Cardiovalve Ltd. | Prosthetic valve with flexible tissue anchor portions |
US10478194B2 (en) | 2015-09-23 | 2019-11-19 | Covidien Lp | Occlusive devices |
US11357510B2 (en) | 2015-09-23 | 2022-06-14 | Covidien Lp | Occlusive devices |
US11471162B2 (en) | 2015-12-07 | 2022-10-18 | Cerus Endovascular Limited | Occlusion device |
US11337683B2 (en) | 2015-12-31 | 2022-05-24 | Mallow Medical (Shanghai) Co., Ltd. | Degradable occluder |
US11648013B2 (en) | 2016-03-11 | 2023-05-16 | Cerus Endovascular Limited | Occlusion device |
US11253261B2 (en) | 2016-03-17 | 2022-02-22 | Swaminathan Jayaraman | Occluding anatomical structures |
RU2654579C2 (en) * | 2016-06-24 | 2018-05-21 | Федеральное государственное бюджетное учреждение "Уральский научно-исследовательский институт фтизиопульмонологии" Министерства здравоохранения Российской Федерации (ФГБУ "УНИИФ" Минздрава России) | Method for surgical treatment of bronchial fistula following pulmonary tuberculosis surgery |
US10856975B2 (en) | 2016-08-10 | 2020-12-08 | Cardiovalve Ltd. | Prosthetic valve with concentric frames |
US11779458B2 (en) | 2016-08-10 | 2023-10-10 | Cardiovalve Ltd. | Prosthetic valve with leaflet connectors |
USD800908S1 (en) | 2016-08-10 | 2017-10-24 | Mitraltech Ltd. | Prosthetic valve element |
WO2018053352A1 (en) * | 2016-09-16 | 2018-03-22 | Nsvascular, Inc. | Thin-film micromesh occlusion devices and related methods |
US10568628B2 (en) * | 2017-05-23 | 2020-02-25 | Muffin Incorporated | Closing device for tissue openings |
US11678884B2 (en) | 2017-05-23 | 2023-06-20 | Muffin Incorporated | Closing device for tissue openings |
USD841812S1 (en) | 2017-08-03 | 2019-02-26 | Cardiovalve Ltd. | Prosthetic heart valve element |
US11246704B2 (en) | 2017-08-03 | 2022-02-15 | Cardiovalve Ltd. | Prosthetic heart valve |
US11571298B2 (en) | 2017-08-03 | 2023-02-07 | Cardiovalve Ltd. | Prosthetic valve with appendages |
US10537426B2 (en) | 2017-08-03 | 2020-01-21 | Cardiovalve Ltd. | Prosthetic heart valve |
USD841813S1 (en) | 2017-08-03 | 2019-02-26 | Cardiovalve Ltd. | Prosthetic heart valve element |
US11793633B2 (en) | 2017-08-03 | 2023-10-24 | Cardiovalve Ltd. | Prosthetic heart valve |
US10575948B2 (en) | 2017-08-03 | 2020-03-03 | Cardiovalve Ltd. | Prosthetic heart valve |
US11812971B2 (en) | 2017-08-21 | 2023-11-14 | Cerus Endovascular Limited | Occlusion device |
US10888421B2 (en) | 2017-09-19 | 2021-01-12 | Cardiovalve Ltd. | Prosthetic heart valve with pouch |
WO2019073480A1 (en) | 2017-10-13 | 2019-04-18 | Sree Chitra Tirunal Institute For Medical Sciences And Technology | Implantable atrial septal defect occlusion device with woven central section on left atrial flange |
US11382746B2 (en) | 2017-12-13 | 2022-07-12 | Cardiovalve Ltd. | Prosthetic valve and delivery tool therefor |
US11872131B2 (en) | 2017-12-13 | 2024-01-16 | Cardiovalve Ltd. | Prosthetic valve and delivery tool therefor |
US11633277B2 (en) | 2018-01-10 | 2023-04-25 | Cardiovalve Ltd. | Temperature-control during crimping of an implant |
US11872124B2 (en) | 2018-01-10 | 2024-01-16 | Cardiovalve Ltd. | Temperature-control during crimping of an implant |
CN108125730A (en) * | 2018-02-27 | 2018-06-08 | 北京裕恒佳科技有限公司 | Artificial blood vessel's preformed hole locking device and its conveying device |
WO2020124048A1 (en) | 2018-12-13 | 2020-06-18 | NXT Biomedical | Blood oxygenation treatment methods and devices |
US11559309B2 (en) | 2019-03-15 | 2023-01-24 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US11317921B2 (en) | 2019-03-15 | 2022-05-03 | Sequent Medical, Inc. | Filamentary devices for treatment of vascular defects |
US11291453B2 (en) | 2019-03-15 | 2022-04-05 | Sequent Medical, Inc. | Filamentary devices having a flexible joint for treatment of vascular defects |
US11559669B2 (en) | 2019-04-04 | 2023-01-24 | Medtronic, Inc. | Cannula delivery catheter and procedure method |
US11766556B2 (en) | 2019-04-04 | 2023-09-26 | Medtronic, Inc. | Cannula fixation device |
WO2020234470A1 (en) | 2019-05-22 | 2020-11-26 | Occlutech Holding Ag | Occluder with stretchable waist |
EP4052661A1 (en) | 2019-05-22 | 2022-09-07 | Occlutech Holding AG | Occluder with stretchable waist |
US11406404B2 (en) | 2020-02-20 | 2022-08-09 | Cerus Endovascular Limited | Clot removal distal protection methods |
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