CA2626867C - Articulating basket with simultaneous basket extension or basket retraction - Google Patents

Articulating basket with simultaneous basket extension or basket retraction Download PDF

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Publication number
CA2626867C
CA2626867C CA2626867A CA2626867A CA2626867C CA 2626867 C CA2626867 C CA 2626867C CA 2626867 A CA2626867 A CA 2626867A CA 2626867 A CA2626867 A CA 2626867A CA 2626867 C CA2626867 C CA 2626867C
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Prior art keywords
basket
articulator
wire
grasping
wires
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CA2626867A
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French (fr)
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CA2626867A1 (en
Inventor
Walter N. Ryan
Anthony D. Hammack
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Cook Medical Technologies LLC
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Cook Medical Technologies LLC
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements 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
    • A61B17/221Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02Instruments for taking cell samples or for biopsy
    • A61B10/04Endoscopic instruments
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8014Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the extension or compression force being caused by interaction of the plate hole and the screws
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8061Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/809Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8605Heads, i.e. proximal ends projecting from bone
    • A61B17/861Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/8615Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00292Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/003Steerable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements 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
    • A61B17/221Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A61B2017/2212Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2901Details of shaft
    • A61B2017/2902Details of shaft characterized by features of the actuating rod
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/291Handles the position of the handle being adjustable with respect to the shaft
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2911Handles rings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2913Handles transmission of forces to actuating rod or piston cams or guiding means
    • A61B2017/2915Handles transmission of forces to actuating rod or piston cams or guiding means arcuate shaped guiding means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2913Handles transmission of forces to actuating rod or piston cams or guiding means
    • A61B2017/2916Handles transmission of forces to actuating rod or piston cams or guiding means pins in guiding slots
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2919Handles transmission of forces to actuating rod or piston details of linkages or pivot points
    • A61B2017/292Handles transmission of forces to actuating rod or piston details of linkages or pivot points connection of actuating rod to handle, e.g. ball end in recess
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2919Handles transmission of forces to actuating rod or piston details of linkages or pivot points
    • A61B2017/2922Handles transmission of forces to actuating rod or piston details of linkages or pivot points toggle linkages
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2923Toothed members, e.g. rack and pinion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2927Details of heads or jaws the angular position of the head being adjustable with respect to the shaft

Abstract

A retrieval device is provided for retrieving stones, calculi and other objects from a body. The device may comprise a body (17), a slide assembly (161) slidably attached to the body, an articulator (13) rotatably attached to the body and in communication with the slide assembly, and wires (11a, lib) attached to the articulator and distally to a basket (B), such that moving the slide assembly can retract and extend the basket longitudinally while operating the articulator moves it transversely.

Description

ARTICULATING BASKET WITH SIMULTANEOUS BASKET EXTENSION
OR BASKET RETRACTION
FIELD OF THE INVENTION
[0002] This invention relates to medical retrieval devices used in minimally invasive surgery, particularly those used to retrieve stones and calculi from a patient.
BACKGROUND OF THE INVENTION
[0003] Stone retrieval devices are often employed in order to remove a stone from a ureter or kidney. Removal of a stone from a ureter or kidney is a difficult process because the area within which the medical professional works is small and narrow.
Often a stone is not located directly in front of the retrieval basket. The location of the stone makes it difficult to retrieve. In an attempt to retrieve the object, the medical professional will attempt to bend the basket, causing the basket to bend-over partially onto itself. This movement will allow one side of the basket to expand and be more open than the opposite side. When the basket is at least partially bent-over on itself, the medical professional will attempt to maneuver the basket so that it encapsulates the object.
However, the basket cannot be extended or retracted while bent. Thus, stones that are not directly in front of the device cannot be easily captured.
[0004] The medical professional has little control of the basket because the basket cannot be bent while being extended or retracted. Thus, during the interim period between when the basket surrounds the stone and when the basket is retracted, the stone can shift, move, or dislodge, making the capture attempt a failure, causing the medical professional to start the procedure over.

BRIEF SUMMARY OF THE INVENTION
[0005] A medical device is provided. The device includes a body, an articulator movably connected to the body, and at least a first and a second wire having distal ends. The first and second wire is in communication with the articulator. The device further includes a tool disposed at the distal end of the first and second wire, wherein the articulator is capable of moving the tool outside the longitudinal plane, and wherein the tool is capable of being extended and retracted in a longitudinal plane simultaneously with movement outside the longitudinal plane.
[0006] Further, a medical device is provided. The device includes a body, a slide assembly slideably attached to the body, and an articulator rotateably attached to the body. The articulator is in communication with the slide assembly.
The device further includes a first wire and a second wire having distal ends, wherein the first wire and the second wire are attached to the articulator.
The device further includes a tool disposed at the distal ends of the first and second wires, wherein the articulator is configured to move the tool outside a longitudinal plane, and wherein the slide assembly is configured to extend and retract the first and second wires.
[0007] Further, a medical device is provided. The device includes a tool formed by at least one wire. The device further includes means for extending or retracting the tool and simultaneously articulating the tool in a plane outside a longitudinal plane.
[0008] Further, a method for retrieving an object is provided. The method includes inserting a device for removing an object into a patient, extending a tool of the device out to the object, and articulating the tool to encapsulate the object.
The method further includes retracting the tool to retrieve the object, wherein the extending and the articulating are capable of being performed simultaneously or the articulating and the retracting are capable of being performed simultaneously.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0009] The embodiments will be further described in connection with the attached drawing figures. It is intended that the drawings included as a part of this specification be illustrative of the embodiments and should in no way be considered as a limitation on the scope of the invention.
[0010] Figs. 1A, 1B-1C show partial cross-sectional views of an embodiment of the device;
[0011] Fig. 1D shows a partial plan view of an embodiment of the device;
[0012] Fig. 1E shows a partial cross-sectional view of an embodiment of the device;
[0013] Fig. 2 is an isometric view of the an embodiment of the device;
[0014] Fig. 3 is an isometric view of an embodiment of the device;
[0015] Figs. 4, and 4A show partial cross-sectional views of the proximal portion of embodiments of the device;
[0016] Figs. 5 and 5A-5C show partial cross-sectional views of the proximal portion of embodiments of the device;
[0017] Figs. 6, and 6A show partial cross-sectional views of the proximal portion of embodiments of the device;
[0018] Figs. 7A-7E are isometric views of pivot pins of embodiments of the device;
[0019] Figs. 8A-8B are isometric views of the proximal portion of embodiments of the device;
[0020] Figs. 9A-9C are isometric views of grasping wire restraint disks of embodiments of the device;
[0021] Fig. 10 is an isometric view of a sheath of an embodiment of the device;
[0022] Fig. 10A is a cross-sectional view of Fig. 10 at line 10A;
[0023] Fig. 10B-10C are isometric views of a sheath of embodiments of the = device;
[0024] Fig. 11 is a close-up view of the distal portion of an embodiment of the device;
[0025] Fig. 12 is a close-up view of the distal portion of an embodiment of the device;
[0026] Fig. 13 is a close-up view of the distal portion of an embodiment of the device;
[0027] Fig. 14A is a perspective view of the distal portion of an embodiment of the device;
[0028] Figs. 14B-14D are frontal views of the distal portion of embodiments of the device; and
[0029] Figs. 15-18 depict another embodiment of the device.
DETAILED DESCRIPTION OF PRESENTLY PREFERRED EMBODIMENTS
[0030] The device provides a way to simultaneously articulate and extend a retrieval basket and also to simultaneously articulate and retract the basket for retrieving stones, calculi, and other objects from a patient. The use of the device is not limited to use in human patients; the device has veterinary and non-medical uses including but not limited to retrieving objects from any hard-to-reach area. A
more detailed description of the embodiments will now be given with reference to Figs. 1-18. The present invention is not limited to those embodiments illustrated;
it specifically contemplates other embodiments not illustrated but intended to be included in the claims.
[0031] Figs. 1A, 1B, 1C, and 1D depict partial cross-sectional views of an embodiment of the device. Retrieval device 10 has a proximal portion 10a and a distal portion 10b. Figs. 1B and 1C are cross-sectionals of proximal portion 10a of retrieval device 10 shown in Fig. 1A. Fig. 1C is a perspective view of proximal portion 10a of retrieval device 10 shown in Fig. 1A. Located at distal portion are two grasping wires lla and 1 lb that travel through a lumen 15a extending through the sheath 15. Although two grasping wires are depicted, it is contemplated that a greater or lesser amount of grasping wires can be used.
Furthermore, it is contemplated that one continuous wire could also be used.
[0032] The use of the word "wire" is not intended to be limiting.
Throughout the disclosure, grasping wires may be made from stainless steel but are preferably made from a shape memory alloy, including but not limited to Nitinol. Nitinol is available from Memry Corp of Bethel, Connecticut and from other suppliers. Grasping wires can also be made from other semi-flexible materials, including but not limited to nylon, plastic, as well as a shape memory polymer. Shape memory polymers are disclosed in U.S.
Patent No. 6,720,402. Grasping wires may also include, but are not limited to, filaments or threads. Grasping wires preferably have a diameter of .005 - .009 inches;
however, the diameter of grasping wires is not limited to those dimensions. Grasping wires may be larger or smaller depending on the need. Grasping wires are preferably round or flat, however other shapes can be used, such as the near- triangular pre-shaped Delta Wire.' available from Cook Urological, Spencer, Indiana.
[0033] At distal portion 10b of retrieval device 10 is a grasping wire connection point 18, which is preferably atraumatic and is used to connect grasping wires 11 a, 11 b so that they come together in the shape of a basket to keep grasping wires 11a, llb constrained together. Grasping wires 11 a, lib may be looped together as shown here to form grasping wire connection point 18, but the connection of grasping wires I1a,11b is not limited to just a loop. Looping of wires is disclosed in U.S. Patent No. 5,989,266.
[0034] Grasping wire restraint disk 16 is located within sheath 15 and can be held in place by ways including but not limited to, gluing, soldering, or sewing into place.
Grasping wire restraint disk 16 is used to keep grasping wires 11a, 11b separated once they enter sheath 15. Grasping wire restraint disk 16 can be made from any medically-acceptable material, including but not limited to, polycarbonate, stainless steel, nylon, other metals, and plastics.
[0035] Sheath 15 protects grasping wires 11a, llb from becoming tangled and controls their interaction with the patient. Sheath 15 is preferably made from PVC, but can also be made from materials including, but not limited to, polytetrafluoroethylene (PTFE), polyimide, nylon, polyurethane, polyethylene, or any polymer or semi-flexible metal. Sheath 15 preferably has an outer diameter of 1.5 ¨ 4.5 Fr., although other sizes can be used and the size should be suitable for insertion through an orifice. The outer diameter of sheath 15 is generally based on the size of the orifice through which it will be introduced.
[0036] The articulator 13 houses pivot pins 14a, 14b, and 14c which can be made from many materials, including but not limited to, stainless steel, medically-acceptable polymers, and metals. Articulator 13 can be made from many materials, including but not limited to, rigid nylon, stainless steel, acrylonitrile-butadiene-styrene (ABS) and other medically acceptable polymers and metals.
Sheath connection point 17d of body 17 is threaded so that sheath 15 can connect to body 17. Wires 11a, lib travel through sheath connection point 17d, into body 17, through lumen 17b of body 17, and out through windows 17c into articulator 13. Pivot pin 14c travels through articulator 13 and through body 17. Pivot pin 14c allows articulator 13 to have tilting see-saw movement on either side of transverse axis X-X articulating basket B. Although a basket is depicted, the use of other tools is contemplated including other grasping and sampling devices.
Additionally, the wires need not be continuous with the tool, nor do the wires and the tool need to be made from the same material. Pivot pins 14a, 14b, and 14c are configured in a triangle-shape.
[0037] First grasping wire ha is shown pulled through lumen 15a of sheath 15, into sheath connection point 17d, into lumen 17b of body 17, out through windows 17c and around pivot pin 14c where it is attached to pivot pins 14a and 14b. Second grasping wire lib is attached directly to third pivot pin 14c.
[0038] The configuration of pivot pins 14a, 14b, 14c allows the user to articulate basket B from side-to-side, making basket B tilt on its side along transverse axis X-X enabling basket B to grasp an object that may not be directly in-line with basket B. Therefore, articulating basket B allows for basket B to move in a plane in addition outside the longitudinal access.
[0039] Furthermore, articulator 13 can move longitudinally along axis Y-Y of body 17 which in turn retracts or extends basket B. Thus, articulator 13 translates relative to body 17; body 17 is stationary with respect to articulator 13 when a thumb (not shown) or other stationary object (not shown) is placed within thumb hole 17a. Two springs 17f sit within body 17 and are in communication with articulator 13 and body 17. Springs are made from stainless steel, although they can be made from any other material so long as they generate an acceptable force to push articulator 13 distally in order to extend basket B. Springs 17f provided resistance against pivot pin 14c which is attached to articulator 13. Thus, when fingers (not shown) apply pressure into either finger groove 12a, 12b and articulator 13 is pulled in the proximal direction, springs 17f are compressed and basket B is retracted. When compression is released from finger groove 12a, 12b, springs 17f are also released and will push articulator 13 in the distal direction, thus extending basket B.
[0040] To articulate basket B, the user tilts articulator 13 on either side of transverse axis X-X by pressing a finger (not shown) down into one of the finger grooves 12a, 12b. Tilting articulator 13 in the direction of finger groove 12a will articulate basket B in the direction of finger groove 12a. Similarly, tilting articulator 13 in the direction of finger groove 12b will articulate basket B
in the ' direction of finger groove 12b.
[0041] While basket B is being articulated, the user can retract basket B by placing a thumb or finger (not shown) in the thumb-hole 17a and using fingers (not shown) placed in finger grooves 12a, 12b to pull articulator 13 proximally along longitudinal axis Y-Y compressing springs 17f. This moves the entire articulator 13 proximally, and thus, moves pivots pins 14a, 14b, and 14c proximally as well. The proximal movement pulls the respective grasping wires 11a, lib proximally and retracts basket B. While retracting basket B, the user can articulate basket B by tilting articulator 13 on either side of transverse axis X-X by placing pressure into either finger groove 12a, 12b.
[0042] Furthermore, while basket B is being articulated, the user can also extend basket B by releasing the compression on finger grooves 12a, 12b, which releases springs 17f so that they push articulator 13 in the distal direction along longitudinal axis Y-Y. This moves the entire articulator 13 distally, and thus, moves pivots pins 14a, 14b, and 14c distally as well. The distal movement pushes the respective grasping wires 11a, 11b distally and extends basket B. While extending basket B, the user can articulate basket B by tilting articulator 13 on either side of transverse axis X-X by placing pressure into either finger groove 12a, 12b.
[0043] Fig. 1E shows a different embodiment from that shown in Fig. 1A.
The embodiment shown in Fig. 1E needs no springs since finger holes 12c, 12d are provided. Thus, when a user places fingers (not shown) within finger holes 12c, 12d, the user is able to move articulator 13 in the distal direction along longitudinal axis Y-Y without the aid of a spring. Further embodiments are shown in Figs. 2-14D.
[0044] Fig. 2 is an isometric view of an embodiment of the device.
Sheath 25 is connected to body 27 at threaded sheath connection point 27d of retrieval device 20. Basket B enters sheath 25 through grasping wire restraint disk 26.
Articulator 23 is shown pushed in the distal direction along longitudinal axis Y-Y
and tilted to the right-side of transverse axis X-X. Articulator 23 is moveable along axis Y-Y in the direction of the proximal portion 20a or distal portion 20b of retrieval device 20 when a user pulls or releases articulator 23, which results in springs 27f being compressed or released resulting in basket B being retracted or extended.
[0045] Retrieval device 20 is introduced into a ureter U through a functional lumen of an endoscope (not shown), or an access sheath, or other device. After introduction into the patient, retrieval device 20 is advanced to stone S.
Here stone S is shown abutted to ledge L of ureter U, and thus, is not directly in front of basket B. When articulator 23 is pulled proximally, springs 27f are compressed and basket B retracts. As articulator 23 is released, springs 27f are released causing articulator 23 to move distally along axis Y-Y, as shown, basket B
extends. A first finger Fl is located in a first finger groove 22a, a second finger F2 is located in a second finger groove 22b, and a thumb T is located in thumb hole 27a. While extending basket B, second finger F2 is pressing and tilting articulator 23 so that articulator 23 tilts along axis X-X, via pivot pin 27c.
This causes basket B to articulate while simultaneously moving articulator 23 distally along longitudinal axis Y-Y to extend basket B out to stone S to surround stone S.
Here, basket B is shown extended and articulated after having just captured stone S.
[0046] Fig. 3 is an isometric view of another embodiment of the device. Here, the basket B of the retrieval device 30 is shown extended and articulated, having captured a stone S abutting a ledge L within a ureter U. The sheath 35 is connected to body 37 at sheath connection point 37d. Basket B enters sheath 35 through grasping wire restraint disk 36. Articulator 33 surrounds body 37.
Articulator 33 has longitudinal movement along longitudinal axis Y-Y.
Furthermore, articulator 33 has tilting see-saw movement along either side of transverse axis X-X due to the pivot pin 34c that extends from articulator 33 through body 37. Articulator 33 moves in the direction of the proximal portion 30a and distal portion 30b of the retrieval device 30 when a user pulls and releases, respectively, articulator 33. Thus, body 37 remains stationary with respect to articulator 33 when a thumb T is placed within the thumb-hole 37a.
When articulator 33 is released springs 37f are released causing articulator 33 to move in the distal direction (not shown), which causes basket B to extend. As articulator 33 is pulled proximally along axis Y-Y, as shown, springs 37f are compressed and basket B retracts. While retracting basket B, a first finger Fl is located in a first finger groove 32a and a second finger F2 is located in a second finger groove 32b. First finger Fl is pressing and tilting articulator 33 so that articulator 33 tilts along transverse axis X-X causing basket B to articulate.
Since basket B is articulated and retracted simultaneously, it can be manipulated in a sweeping motion to capture stone S.
[0047] Figs. 4, 4A, 5, 5A, 5B, 5C, 6, and 6A each show partial cross-sectional views of the proximal portion of embodiments of the device. The figures each show different configurations of the pivot pins housed within the articulator, 43, 53, 63. In Fig. 4 the retrieval device 40 has articulator 43 that houses pivot pins 44a, 44b, 44c. Each grasping wire 41a, 41b enter lumen 47b of body 47 at the sheath connection point 47d. From there, grasping wires 41a, 41b travel through lumen 47b of body 47 and out through windows 47c of body 47 into articulator 43. Each grasping wire 41a, 41b loops around pins 44a, 44b. Pivot pin 44c travels through articulator 43 and into body 47 to allow for tilting see-saw movement of articulator 43 which in turn articulates the basket (not shown).
Furthermore, articulator 43 is movably connected to body 47 to allow for longitudinal movement which extends and retracts grasping wires 41a and 41b attached to pivot pins 44a, 44b. Springs 47f are compressed when articulator 43 is pulled in the proximal direction via finger grooves 42a, 42b and thumb hole 47a which retracts the basket (not shown). When springs 47f are released they push articulator 43 in the distal direction which extends the basket (not shown).
[0048] Fig. 4A is the same as Fig. 4, except that no springs are needed since articulator 43 has finger loops 42c, 42d that allow a user to push and pull articulator along longitudinal axis of body 47 in order to extend and retract the basket (not shown).
[0049] Fig. 5 shows another pivot pin ¨ 54a, 54b, 54c ¨ configuration housed within articulator 53 of retrieval device 50. Here, grasping wires 51a, 51b each travel through lumen 57b of body 57 at sheath connection point 57d, out through windows 57c, and into articulator 53. Each end of grasping wires 51a, 51b are each attached to a pivot pin 54a, 54b, located on either side of articulator 53.
Pivot pin 54c travels through articulator 53 and into body 57 to allow for tilting see-saw movement which in turn articulates basket (not shown). Furthermore, articulator 53 is movably connected to body 57 to allow for longitudinal movement which extends and retracts grasping wires 51a and 51b attached to pivot pins 54a, 54b. The greater the distance, the less tilting see-saw movement of articulator 53 is required to articulate the basket (not shown). Springs 57f are compressed when articulator 53 is pulled in the proximal direction using finger grooves 52a, 52b, and thumb hole 57a which retracts the basket (not shown).
When springs 57f are released they push articulator 53 in the distal direction which extends the basket (not shown).
[0050] Fig. 5A is the same as Fig. 5, except that no springs are needed since articulator 53 has finger loops 52c, 52d that allow a user to push and pull articulator along the longitudinal axis of body 57 in order to extend and retract the basket (not shown).
[0051] Fig 5B is the same as Fig. 5 except grasping wires 51a and 51b are in a different configuration. Here, each grasping wire 51a, 51b first goes around pin 54c before connecting to pivot pins 54a, 54b.
[0052] Fig. 5C is the same as Fig. 5B, except that no springs are needed since articulator 53 has finger loops 52c, 52d that allow a user to push and pull articulator directly along a longitudinal axis of body 57 in order to extend and retract the basket (not shown).
[0053] Fig. 6 shows yet another pivot pin configuration ¨ 64a, 64b, 64c, 64d, 64e ¨ housed within articulator 63 of retrieval device 60. Grasping wires 61a, and 61b enter body 67 at sheath connection point 67d and travel through lumen 67b of body 67. Grasping wires 61a and 61b then both loop around fourth pivot pin 64d, exit through window 67c, and are attached to first pivot pin 64a. Grasping wires 61a and 61b also both loop around third pivot pin 64c, exit through window 67c, and then are attached to second pivot pin 64d. Pivot point 64e allows for the articulator 63 to have tilting see-saw movement to allow the basket (not shown) to be articulated. Articulator 63 to move longitudinally proximally and distally along longitudinal axis of body 67. This configuration allows for both pushing and pulling of the basket (not shown). Springs 67f are compressed when articulator is pulled in the proximal direction using finger grooves 62a, 62b, and thumb hold 67a which retracts the basket (not shown). When springs 67f are released they push articulator 63 in the distal direction which extends the basket (not shown).
[0054] Fig. 6A is the same as Fig. 6, except that no springs are needed since articulator 63 has finger loops 62c, 62d that allow a user to push and pull articulator along longitudinal axis of body 67 in order to extend and retract the basket (not shown).
[0055] Figs. 7A-7E are isometric views of pivot pins of embodiments of the device. In Fig. 7A, pivot pin 74a is a nail-shaped pin having a head H that has a greater diameter than the body. This prevents grasping wire 71 from slipping off of pivot pin 74a when the basket (not shown) is articulated, extended, and/or retracted.
[0056] Fig. 7B shows an alternate embodiment of pivot pin 74b having an eye E in which grasping wire 71 is threaded through to prevent it from becoming detached from pivot pin 74b when the basket (not shown) is articulated, extended, and/or retracted.
[0057] Fig. 7C shows a pivot pin 74c with an arch shape through which grasping wire 71 is threaded to prevent grasping wire 71 from becoming detached from pivot pin 74c when the basket (not shown) is articulated, extended, and/or retracted.
[0058] Fig. 7D shows a pivot pin 74d having a "j" shape, an angular bend AB, and a head H that has a larger diameter than the body. Pivot pin 74d keeps grasping wire 71 in place when the basket (not shown) is articulated, extended, and/or retracted.
[0059] Fig. 7E shows a pivot pin 74e with grasping wire 71 attached to pivot pin 74e by way of soldering.
[0060] Figs. 8A and 8B are isometric views of the proximal portion of embodiments of the device. In Fig. 8A the articulator 83 of retrieval device 80 has ergonomically-shaped finger grooves 82a, 82b and thumb-hole 87a. The shape provides a comfortable fit for fingers Fl, F2 and thumb T. Grasping wires 81a, 81b enter body 87 at sheath connection point 87d, travel though lumen 87b, and connect to pivot pins (now shown). Pivot pin 87c allows articulator 83 to have tilting see-saw movement in order to allow for the basket (not shown) to articulate.
Basket (not shown) retraction occurs by moving articulator 83 proximally along longitudinal axis of body 87 which compresses springs 87f. Basket (not shown) extension occurs by releasing articulator 83 which decompresses springs 87f causing articulator 83 to move along body 87.
[0061] Fig. 8B shows an alternate configuration of articulator 83 of retrieval device 80. Here, articulator 83 has ergonomically-shaped finger holes 82c, 82d for fingers F1, F2. No springs are needed in this embodiment since finger holes 82c, 83d allow the user to pull and push articulator 83 directly thus enabling basket (now shown) retraction and extension.
[0062] Figs. 9A-9C are isometric views of grasping wire restraint disks. In Fig. 9A the grasping wire restraint disk 96 is shown having four guide holes 96a for wires in the shape of a cross. Each grasping wire (not shown) is threaded through a single lumen 96a of grasping wire restraint disk 96.
[0063] Fig. 9B shows a grasping wire restraint disk 96 wherein four lumens are created with circular-shaped openings 96b cut into grasping wire restraint disk 96 creating four guide holes. Each of grasping wires (not shown) are threaded through a single lumen 96b of grasping wire restraint disk 96.
[0064] Fig. 9c shows a grasping wire restraint disk 96 wherein grasping wires (not shown) are treaded through a single lumen 96c.
[0065] Fig. 10 is an isometric view of an optional sheath for the retrieval device. Here, instead of maintaining grasping wire (not shown) separation by using a grasping wire restraint disk (not shown) the sheath 105 itself has four semi-circular lumens 105a. A cross section of sheath 105 at line-10A is depicted in Fig. 10A. Each grasping wire (not shown) are threaded through a lumen 105a of sheath 105 so that the grasping wires (not shown) do not become tangled and stay separated as they travel through sheath 105. Fig. 10B depicts an alternate configuration of circular-grasping wire lumens 105b built into sheath 105.
Fig.
10C depicts an alternate configuration of a single circular grasping wire lumen 105c built into sheath 105.
[0066] Fig. 11 is a close-up view of the distal portion 110b of an embodiment of retrieval device 110. Here, grasping wires 111a, 111b are connected at grasping wire connection point 118 via a soldered point in order to form the top of basket B.
[0067] Fig. 12 is a view of the distal portion 120b of retrieval device 120.
Here, grasping wires 121a, 121b, are connected at grasping wire connection point 128 via a grasping wire connection disk 128a in order to form the top of basket B.
Grasping wire connection disk 128a can be made from many materials including polycarbonates, stainless steel, nylon, and polymers. Grasping wire connection disk 128a contains four holes 128b through which grasping wires 121a, 121b are threaded.
[0068] Fig. 13 is a view of the distal portion 130b of retrieval device 130.
Here, grasping wires 131a, 131b are connected at grasping wire connection point 138 via a loop-in-loop configuration in order to form the top of basket B.
[0069] Fig. 14A is a perspective view of the distal portion of retrieval device 140. Each grasping wire 141a, 141b is connected at a soldered grasping wire connection point 148 and then threaded into sheath 145. The net configuration of grasping wires 141a, 141b may enable better retrieval of smaller stones or calculi that could slip between the wires if there were no net.
[0070] Figs. 14B-14D are frontal views of retrieval device embodiments 140, 180, 190. Each show grasping wire 141a, 141b connected at a soldered grasping wire connection point 148. Each figure depicts a different net-configuration of wire fibers 141c, 141d, 141e. Wire fiber 141c, 141d, 141e configurations are not limited to those depicted. Depending on the shape of the object to be retrieved, different wire fiber 141c, 141d, 141e configurations may result in a better retrieval success rate of smaller stones (not shown), calculi (not shown), or other objects (not shown).
[0071] Figs. 15-17 depict different views of another embodiment of the device.
Fig. 15 is a side-view of a retrieval device 150 having a proximal portion 150a and a distal portion 150b. Fig. 16 is a partial cross-sectional view of retrieval device 150. Fig. 17 is an exploded view of articulator 162.
[0072] Body 157, and the components housed therein including an articulator 162 and a slide assembly 161 depicted in Figs. 16-17, can be made from many materials, including but not limited to, rigid nylon, stainless steel, acrylonitrile-butadiene-styrene (ABS) and other medically acceptable polymers and metals.
Body 157 is preferably a snap-fit housing consisting of two pieces that house that components depicted in Figs. 16-17.
[0073] Distal portion of grasping wires come together to form a basket (not shown). Each of grasping wires 151a and 151b is disposed through optional sheath 105 and is connected to a wire pivot 153a, 153b respectively. Wire pivots 153a, 153b each have a male thread 155a, 155b, respectively, that engages with female thread 156a, 156b, respectively, located on articulator drum 160.
Articulator drum 160 has a post 159 disposed therethrough. Articulator drum is rotateably attached to slide assembly 161 which is slideably attached to body 157 and is held in place by each of anchors 158a, 158b that are fixedly attached to post 159 and rotateably attached to body 157. Tilting lever 154 from side to side causes post 159 and articulator drum 160 to rotate in the direction that lever 154 is pushed. Rotation of the drum 160 is not limited to use of lever 154; the device can also be driven by a gear set, a wheel, or any device capable of causing rotation.
As articulator drum 160 is rotated, wire pivots 153a, 153b move opposite each other in the proximal 150a or distal 150b direction causing each of wires 151a, 151b to move in the direction that wire pivots 153a, 153b move; accordingly, this movement causes the basket to articulate from side to side. Pulling slide 152 in the proximal direction 150a causes the basket to retract because articulator drum 160 and its component wire pivots 153a, 153b and grasping wires 151a, 151b are moved in the proximal direction. Pushing slide 152 in the distal direction 150b causes the basket to extend because articulator drum 160 and its component wire pivots 153a, 153b and grasping wires 151a, 151b are moved in the distal direction. In addition, the basket can be articulated by tilting lever 154 with finger Fl and simultaneously retracted or extended by moving slide 152 in the proximal 150a or distal 150b direction with thumb T. The embodiments described are not limited to the specific component parts herein named. For example the articulating components could be made from a series of gears and/or wheels that are configured to articulate a basket. Additionally, not all component parts are necessary, nor is it required that the component parts be assembled in an identical fashion. For example, the locations of lever 154 and slide 152 are not limited to that which is shown; both may be placed in alternate locations including the side of the retrieval device as depicted in Fig. 18, retrieval device 170.
Additionally, wire pivots 153a, 153b may be configured so as to move along the same female thread 156a, as depicted in Fig. 18.

10074] To use a retrieval device having an articulating basket for removing an object from a patient that is configured for simultaneous basket extension or basket retraction, the basket is inserted into the patient and is moved near an item to be removed from a patient, i.e. a calculus, stone, etc. The basket is extended out to the object to be removed. The object to be removed is captured by simultaneously articulating the basket while extending or retracting the basket until the object is captured. The basket is then retracted and the device and object are removed from the patient.
[0075] As is evident, the embodiments provide a very effective solution for removal of stones, calculi, or other objects from a patient by a device that allows for simultaneous basket articulation and extension, and also provides for simultaneous basket articulation and retraction.
[00761 The scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole,

Claims (4)

What is claimed is:
1. A retrieval device, the device comprising:
a tool formed by a first and a second wire; and means for extending or retracting the tool and simultaneously articulating the tool in a plane outside a longitudinal plane, wherein the means for articulating the tool comprises a first wire pivot and a second wire pivot, wherein the first wire pivot and the second wire pivot are attached to an articulator drum, wherein the articulator drum includes a means for facilitating guided movement of the first wire pivot and the second wire pivot across a surface of the articulator drum, wherein the first wire pivot is threadily attached to the first wire, and the second wire pivot is threadily attached to the second wire, wherein the first wire pivot is positioned proximal to the second wire pivot, and wherein the first wire pivot is fixedly attached to the first wire, and the second wire pivot is fixedly attached to the second wire.
2. The device according to Claim 1, wherein the means for extending the tool comprises a slide assembly.
3. The device according to Claim 1, wherein the tool is a basket, a grasping device, or a sampling device.
4. The device according to Claim 1, wherein the means for articulating the tool comprises an articulator.
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EP1942811B1 (en) 2016-09-28
CA2626867A1 (en) 2007-05-18
US9597100B2 (en) 2017-03-21
US8597303B2 (en) 2013-12-03
EP3111866A1 (en) 2017-01-04
EP1942811A1 (en) 2008-07-16
US20140058404A1 (en) 2014-02-27
US20170319220A1 (en) 2017-11-09
EP3111866B1 (en) 2019-04-24
WO2007056003A1 (en) 2007-05-18
US20070106304A1 (en) 2007-05-10

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