WO1997005912A2 - Retractable venipuncture catheter needle and receptacle - Google Patents

Retractable venipuncture catheter needle and receptacle Download PDF

Info

Publication number
WO1997005912A2
WO1997005912A2 PCT/US1996/012570 US9612570W WO9705912A2 WO 1997005912 A2 WO1997005912 A2 WO 1997005912A2 US 9612570 W US9612570 W US 9612570W WO 9705912 A2 WO9705912 A2 WO 9705912A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
carrier
needle
slot
extending
Prior art date
Application number
PCT/US1996/012570
Other languages
French (fr)
Other versions
WO1997005912B1 (en
WO1997005912A3 (en
Inventor
John Douglas Rohrbough
David James Faughnder
Original Assignee
Fh Faulding & Co. Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fh Faulding & Co. Limited filed Critical Fh Faulding & Co. Limited
Priority to AU67162/96A priority Critical patent/AU6716296A/en
Publication of WO1997005912A2 publication Critical patent/WO1997005912A2/en
Publication of WO1997005912A3 publication Critical patent/WO1997005912A3/en
Publication of WO1997005912B1 publication Critical patent/WO1997005912B1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle

Definitions

  • This invention relates to apparatus for intravenous insertion of a catheter.
  • a catheter is an elongated, resilient, small-diameter tube normally inserted into a vein of a patient for the introduction or withdrawal of fluid.
  • the catheter is normally left in position for at least several hours. It should be inserted safely and in a way to cause minimum discomfort to the patient.
  • a cannula or hollow needle such as a hypodermic needle made of stainless steel, is disposed within the catheter to provide a sharp point projecting slightly beyond the end of the catheter to be inserted into the vein of the patient.
  • the sha ⁇ point of the needle penetrates the skin and vein of the patient with minimum injury and discomfort, and guides the catheter into the vein. Once the catheter is in position, the needle is withdrawn and discarded.
  • Accidental scratching or sticking personnel with a used needle can present a serious health hazard, including the possibility of transmitting infectious diseases, such as hepatitis, AIDS, herpes, and the like, from a contaminated used needle.
  • the patented devices have various disadvantages. They have a complicated structure, are not easily operated with one hand, do not provide positive prevention of incorrect use, require operation in a manner which increases the risk of accidentally driving the canula entirely through a vein, or do not provide permanent shielding of the used needle.
  • This invention provides intravenous catheter insertion apparatus which is simple, inexpensive, easy to make, easy to operate with one hand, and which minimizes the risk of driving the cannula entirely through a vein. Moreover, after the hypodermic needle has been used to insert the catheter, the needle can be positively and permanently enclosed in a housing with one hand and without being exposed so that it cannot be reused or accidentally stick someone. One-handed operation of the apparatus of this invention is important because it leaves the other hand free to stabilize the position of the inserted catheter as the needle is withdrawn to the enclosed position without ever exposing the sha ⁇ point of the used needle.
  • the apparatus of this invention includes a cannula carrier disposed in an elongated housing having a front and a rear end.
  • the carrier is movable by operation with only one hand from a first to a second position by an actuator which extends from the carrier through a longimdinally extending slot in the wall of the housing.
  • An elongated cannula (hypodermic needle) is secured at one end to the carrier and extends longimdinally through an opening in the front end of the housing so the other (sha ⁇ ) end of the needle extends from the housing when the carrier is in the first position.
  • the needle is adapted to support a cannula, which fits over the needle.
  • the actuator permits one-handed operation to move the carrier from the first to the second position to retract the needle into the housing until the sha ⁇ end of the needle is shielded within the housing.
  • Releasable locking means on the acmator and in the slot permit the carrier to be releasably locked in the first position.
  • Permanent locking means on the carrier and on the housing adjacent the second position permit the carrier to be permanently locked in the second position with the needle fully retracted into the housing.
  • the term "permanent locking means" indicates an arrangement in which the carrier cannot be moved relative to the housing without breaking the apparams, or using a special tool.
  • the permanent locking means includes a locking stud on the rear end of the carrier which fits into a forwardly opening socket on an end cap mounted in the rear end of the housing.
  • the acmator preferably includes a front shank mounted on the carrier to extend outwardly away from the central longimdinal axis of the housing.
  • the front end of a longimdinally extending cantilever arm is secured to the outer end of the front shank.
  • the rear end of the arm is secured to a transverse locking block which is connected to the inner end of an outwardly extending shank which passes through the longimdinal slot in the housing wall.
  • the forward end of the longimdinal slot includes a transverse notch, which receives the transverse block, which is wider than the transverse width of the longimdinal slot.
  • the two shanks and cantilever arm are somewhat flexible, and, with the block, are molded from plastic as an integral unit with the needle carrier.
  • the cantilever arm acts as a leaf spring which urges the block to move outwardly so that when the carrier is moved to the first position, the transverse block snaps outwardly into the transverse notch at the forward end of the longimdinal slot in the housing wall to lock the carrier in the first or forward position.
  • a releasable lock is formed between the locking block and the forward end of the longimdinal slot in the housing.
  • the releasable lock is released by pushing the rear shank inwardly toward the center of the housing to cause the transverse block to move inwardly and out of the transverse notch so that the outer face of the transverse block can slide along the inner face of the housing wall, and permit the rear shank to travel through the longimdinal slot of the housing and move the carrier to the rear or second position to engage the permanent locking means.
  • the permanent locking means includes a rearwardly extending locking smd on the rear face of the carrier. The smd snaps into an outwardly and forwardly diverging socket on an end cap mounted in the rear end of the housing.
  • the socket is formed of several longimdinally extending fmgers anchored at their respective rear ends to the end cap.
  • Each finger includes a surface spaced from the longimdinal axis of the housing, and which slopes outwardly in a forward direction.
  • Each finger includes a rearwardly facing shoulder pe ⁇ endicular to the longimdinal axis of the housing.
  • Each shoulder engages a matching surface at the forward end of a rearwardly and inwardly tapering section on the rear end of the locking smd.
  • the tapered portion of the carrier smd enters the outwardly and forwardly diverging socket formed by the fingers, spreads the fingers apart, and permits them to snap toward each other in front of the transverse annular shoulder formed on the carrier smd.
  • the smd is now permanently locked in the socket, and cannot be removed without rupturing the material used to make the smd on the fingers, or using a special tool.
  • FIG. 1 is a longimdinal sectional view of the apparams with the carrier releasably locked in the forward or first position so the needle extends outwardly from the front end of the housing;
  • FIG. 2 is a longimdinal sectional view of the housing before any assembly of the apparams;
  • FIG. 3 is a top view of the needle carrier and needle before assembly within the housing
  • FIG. 4 is a view taken on line 4-4 of FIG. 3;
  • FIG. 5 is a view taken on line 5-5 of FIG. 4;
  • FIG. 6 is a longimdinal sectional view of the end cap before assembly in the rear end of the housing.
  • a cannula (hypodermic needle) 10 is secured at one end in a small bore 11 connecting with the interior of a hollow, generally cylindrical needle carrier 12 (FIGS. 1 and 5), which makes a sliding fit inside an elongated cylindrical and hollow housing 13, which has a cylindrical wall 14, a front (left as viewed in the drawing) end 15, and a rear (right as viewed in the drawing) end 16.
  • the front end of the needle carrier includes a tapered Luer nozzle 17 shaped to make a snug fiction fit inside a conventional female Luer-Lock fitting 18 (FIG. 1) formed in a catheter hub 20, which carries a catheter 22 adapted to make a close sliding fit over the needle 10, which has a sha ⁇ end 23 projecting slightly beyond the left end of the catheter.
  • the needle is secured in the small bore 11 by any suitable means, such as glue, spin- welding, or the like.
  • the needle carrier includes an elongated cylindrical large bore 21 which communicates with the right open end of the needle.
  • the large bore 21 serves as a flash chamber to receive blood once the tip of the needle enters a patient's vein.
  • the housing and needle carrier are each made of a clear moldable plastic, such as polytetrafluoride, polyethylene, polypropylene, polystyrene, polycarbonate, and the like, to make it possible for the nurse to see "flash back" of blood entering the flash back chamber.
  • a conventional filter venting plug 24 sealed in the rear open end of the needle carrier is permeable to air to allow flash back, but prevents blood from entering the interior of the housing 13.
  • An elongated needle cover 26 makes a snap fit on the forward end of the housing 13 to cover the catheter and needle, the forward end of which projects slightly beyond the forward end of the catheter.
  • the forward end of the needle is in the shape of a scarf or sha ⁇ point.
  • the rear end of the needle cover includes an inwardly extending annular boss 27, which makes a releasable snap fit in an annular groove 28 (FIG. 2) around the exterior surface of the forward end of the housing.
  • the cover is made of plastic, and has a wall sufficiently thin that it can easily be deformed to snap into and out of releasable locking engagement with the forward end of the housing.
  • An acmator 29 on the needle carrier includes a square (as viewed in FIG. 3) thumb tab 30 formed integrally with the outer end of a transverse rear shank 32, the inner end of which is secured to a transverse rectangular locking block 34 on the rear end of an elongated, longimdinal cantilever arm 36, the forward end of which is formed integrally with the outer end of transverse front shank 37 formed integrally at its inner end with the exterior of the needle carrier, which is of circular cross section (FIG. 5) of slightly smaller diameter than the housing interior diameter.
  • a pair of longimdinally spaced and outwardly extending annular guides 38 formed integrally with the carrier make a close sliding fit in the housing to maintain coaxial alignment of the carrier in the housing.
  • the transverse dimension of the locking block 34 and cantilever arm 36 is slightly greater than that of the rear shank 32, which extends from the interior of the housing 13 through an elongated and longimdinally extending slot 39 in the housing wall 14.
  • the cantilever acts as a spring, and normally is parallel to the longimdinal axis of the housing, as shown in FIG. 1.
  • the apparams is easily assembled to the position shown in FIG. 1 by inserting the needle and needle carrier into the rear (end) of the housing.
  • the longimdinal axis of the needle carrier is positioned co-linearly with the central longimdinal axis 40 (FIGS. 1 & 2) of the housing, and the needle carrier is oriented so that the radially extending rear shank 32 on the needle carrier is aligned with the slot 39 in the housing wall.
  • the transverse dimension of the rear shank is slightly less than that of the slot.
  • the transverse dimension of the block 34 is slightly greater than that of the slot.
  • the thumb tab 30 is depressed slightly to deflect the rear end of the cantilever arm inwardly so that the upper surface of the block is just inside the inner surface of the housing to permit the needle carrier to be pushed forward into the housing interior by the application of longimdinal force to the needle carrier or thumb tab 30.
  • the needle carrier moves forward (with the rear shank 32 sliding in slot 39 until the rear end of the cantilever arm 34 reaches a transverse notch 41 (FIG. 2) at the forward end of slot 39.
  • the notch is slightly wider than the transverse dimension of the block on the rear end of the cantilever arm, and has a longimdinal dimension slightly greater than that of the locking block, which permits the rear end of the arm to snap outwardly and move the block into the notch 41.
  • the block releasably locks the needle carrier against longimdinal movement within the housing unless the thumb tab 30 is depressed to move the block inwardly and out of the notch.
  • the carrier can then be moved toward the rear end of the housing.
  • the outwardly extending circular guides 38 on the exterior of the needle carrier provide clearance for the cantilever arm to deflect at its rear end to a location within the housing wall and thus clear the block from the notch 41 and place the outer surface of the block within the inner surface of the housing wall.
  • an end cap 42 (FIGS. 1 and 6) is sonically welded inside the rear end of the housing.
  • the end cap is made of a suitable plastic which permits sonic welding of it to the housing.
  • the end cap includes a longimdinally extending sleeve 44 which makes a snug coaxial fit within the rear end of the housing, and which curves slightly inwardly in a forward direction.
  • An outwardly extending annular flange 46 formed on the rear end of the sleeve has a forward face 48 welded to the rear end of the housing.
  • a radially and longimdinally extending spacer 50 formed integrally with the sleeve and forward face of the flange makes a snug fit within the housing slot, and is also welded to the housing. The spacer helps maintain the uniform width of the slot in the housing to facilitate sliding the carrier as described below.
  • Each fmger includes a short longimdinal section 58 at the inner end of a respective ramp 57. The sections 58 are equally spaced around the longimdinal axis 40 of the housing.
  • a separate radially extending locking section 59 which is pe ⁇ endicular to the longimdinal axis of the housing, is formed at its inner edge with the rear edge of a respective straight section 48 and terminates at its respective outer surface with the interior surface of the sleeve to form a separate locking tooth on each finger.
  • the four fingers form a forwardly opening socket 60 with a forwardly diverging annular surface defined by the inner faces of the forward ends of the fingers.
  • the rear end of the needle carrier includes a longimdinally extending barb-shaped locking smd 62 which has a frusto conical nose surface 64 which converges inwardly toward the rear end of the housing to facilitate penetration of the locking socket by the locking smd.
  • An annular outwardly opening groove 64 in the locking smd a short distance forward of the rear end of the smd forms an annular and forwardly facing locking surface 66 which is pe ⁇ endicular to the longimdinal axis of the housing.
  • the locking smd drives into the locking socket.
  • the frusto conical surface 62 of the locking smd engages the matching interrupted frusto conical surface of the socket, and spreads the fingers 44 outwardly so the ramps of the fingers ride up over the surface, and permit each locking section 59 on a respective finger to drop into the annular notch 64 on the locking smd to permanently lock the needle carrier in the second or rear position where the carrier cannot be moved without rupturing the material which forms the permanent lock, or without use of a special tool (not shown) which can be inserted into the rear end of the socket to spread the fingers apart and permit the carrier to be released.
  • the various parts of the apparams can be made from the same or different kinds of molded plastics, as long as the cantilever arm on the carrier has suitable strength and resilience to act as a leaf spring and urge the locking block outwardly away from the longimdinal axis of the housing.
  • the end cap and housing materials should be compatible for acoustic welding.
  • the device is assembled as shown in FIG. 1, it is then packaged and terminally sterilized.
  • the nurse opens the package, prepares the patient's venipuncture site, removes needle cover 26, makes the venipuncture, and observes the blood flash back into the needle carrier 12. Holding the housing with one hand, the nurse advances the catheter and needle into the vein, having first slightly manipulated the catheter hub on the carrier nose to be sure that the two elements will separate easily. This manipulation is done carefully to prevent moving the catheter longimdinally far enough to extend beyond the sha ⁇ point of the needle. Otherwise, there is the danger of damaging the catheter by thereafter trying to re-expose the sha ⁇ end of the needle. Such damage could provide a site for formation of blood clots, which could be life threatening to the patient.
  • the nurse uses one hand to hold the catheter in that position, and with the other hand holding the housing, retracts the needle into the housing by pushing down on the thumb tab 30 to release the forward lock and thereafter sliding the thumb tab and needle carrier to the rear of the housing to drive the locking smd into the locking socket.
  • This locks the needle carrier in the permanent locking position at the rear of the housing, which is sufficiently long to enclose the sha ⁇ end of the needle.
  • the housing acts as a "Sha ⁇ S box" for the potentially dangerous needle, which is now no longer exposed.
  • the apparams just described is easily operated with one hand by either holding the housing between the thumb and the middle finger and using the index finger to retract the tab, or the housing can be held in the palm of the hand with four fingers, and the tab retracted by sliding it back with the thumb. In either case, the other hand is free to hold the catheter in place in the patient's vein as the needle is retracted and permanently stored in the housing.
  • the releasable lock for the needle carrier and the housing in the first position at the front of the housing is easily released by simply applying a slight radial and inward force on the tab, which unlocks the carrier from the housing without requiring any longimdinal force on the apparams.
  • the carrier smd engages the socket, and requires longimdinal force to permanently lock the carrier to the housing end cap, the sha ⁇ end of the needle is safely within the housing.

Abstract

Intravenous catheter apparatus includes an elongated housing (38) surrounding a carrier (12), moveable from a first position to a second position. Movement of the actuator unlocks and slides the carrier from the first to the second position.

Description

RETRACTABLE VENIPUNCTURE CATHETER NEEDLE AND RECEPTACLE
BACKGROUND OF THE INVENTION This invention relates to apparatus for intravenous insertion of a catheter.
A catheter is an elongated, resilient, small-diameter tube normally inserted into a vein of a patient for the introduction or withdrawal of fluid. The catheter is normally left in position for at least several hours. It should be inserted safely and in a way to cause minimum discomfort to the patient. Typically, a cannula or hollow needle, such as a hypodermic needle made of stainless steel, is disposed within the catheter to provide a sharp point projecting slightly beyond the end of the catheter to be inserted into the vein of the patient. The shaφ point of the needle penetrates the skin and vein of the patient with minimum injury and discomfort, and guides the catheter into the vein. Once the catheter is in position, the needle is withdrawn and discarded. Accidental scratching or sticking personnel with a used needle can present a serious health hazard, including the possibility of transmitting infectious diseases, such as hepatitis, AIDS, herpes, and the like, from a contaminated used needle.
Many devices have been designed to prevent needle stick from used hypodermic needles. Examples are U.S. Patent No. 5,256,156 to Marks (1993); U.S. Patent No. 5,205,829 to Lituchy (1993); U.S. Patent No. 5,102,394 to Lasaitis et al (1992); U.S. Patent No. 4,950,252 to Luther et al (1990); U.S. Patent 4,909,793 to Vining et al (1990); U.S. Patent 5,273,540 to Luther (1993); U.S. Patent 4,917,669 to Bonaldo (1990); U.S. Patent 5,000,740 to Ducharme et al. (1991); U.S. Patent 5,205,829 to Lituchy (1993); U.S. Patent 5,520,654 to Wahlberg (1996); and U.S. Patent No. 5,456,668 to Ogle (1994). The patented devices have various disadvantages. They have a complicated structure, are not easily operated with one hand, do not provide positive prevention of incorrect use, require operation in a manner which increases the risk of accidentally driving the canula entirely through a vein, or do not provide permanent shielding of the used needle.
SUMMARY OF THE INVENTION
This invention provides intravenous catheter insertion apparatus which is simple, inexpensive, easy to make, easy to operate with one hand, and which minimizes the risk of driving the cannula entirely through a vein. Moreover, after the hypodermic needle has been used to insert the catheter, the needle can be positively and permanently enclosed in a housing with one hand and without being exposed so that it cannot be reused or accidentally stick someone. One-handed operation of the apparatus of this invention is important because it leaves the other hand free to stabilize the position of the inserted catheter as the needle is withdrawn to the enclosed position without ever exposing the shaφ point of the used needle.
- ι - Briefly, the apparatus of this invention includes a cannula carrier disposed in an elongated housing having a front and a rear end. The carrier is movable by operation with only one hand from a first to a second position by an actuator which extends from the carrier through a longimdinally extending slot in the wall of the housing. An elongated cannula (hypodermic needle) is secured at one end to the carrier and extends longimdinally through an opening in the front end of the housing so the other (shaφ) end of the needle extends from the housing when the carrier is in the first position. The needle is adapted to support a cannula, which fits over the needle. The actuator permits one-handed operation to move the carrier from the first to the second position to retract the needle into the housing until the shaφ end of the needle is shielded within the housing.
Releasable locking means on the acmator and in the slot permit the carrier to be releasably locked in the first position. Permanent locking means on the carrier and on the housing adjacent the second position permit the carrier to be permanently locked in the second position with the needle fully retracted into the housing. As used herein, the term "permanent locking means" indicates an arrangement in which the carrier cannot be moved relative to the housing without breaking the apparams, or using a special tool.
In the preferred form of the invention, the permanent locking means includes a locking stud on the rear end of the carrier which fits into a forwardly opening socket on an end cap mounted in the rear end of the housing. The acmator preferably includes a front shank mounted on the carrier to extend outwardly away from the central longimdinal axis of the housing. The front end of a longimdinally extending cantilever arm is secured to the outer end of the front shank. The rear end of the arm is secured to a transverse locking block which is connected to the inner end of an outwardly extending shank which passes through the longimdinal slot in the housing wall. The forward end of the longimdinal slot includes a transverse notch, which receives the transverse block, which is wider than the transverse width of the longimdinal slot. The two shanks and cantilever arm are somewhat flexible, and, with the block, are molded from plastic as an integral unit with the needle carrier. The cantilever arm acts as a leaf spring which urges the block to move outwardly so that when the carrier is moved to the first position, the transverse block snaps outwardly into the transverse notch at the forward end of the longimdinal slot in the housing wall to lock the carrier in the first or forward position. Thus, a releasable lock is formed between the locking block and the forward end of the longimdinal slot in the housing. The releasable lock is released by pushing the rear shank inwardly toward the center of the housing to cause the transverse block to move inwardly and out of the transverse notch so that the outer face of the transverse block can slide along the inner face of the housing wall, and permit the rear shank to travel through the longimdinal slot of the housing and move the carrier to the rear or second position to engage the permanent locking means. Preferably, the permanent locking means includes a rearwardly extending locking smd on the rear face of the carrier. The smd snaps into an outwardly and forwardly diverging socket on an end cap mounted in the rear end of the housing. Preferably, the socket is formed of several longimdinally extending fmgers anchored at their respective rear ends to the end cap. Each finger includes a surface spaced from the longimdinal axis of the housing, and which slopes outwardly in a forward direction. Each finger includes a rearwardly facing shoulder peφendicular to the longimdinal axis of the housing. Each shoulder engages a matching surface at the forward end of a rearwardly and inwardly tapering section on the rear end of the locking smd. Thus, as the carrier is moved rearwardly from the first to the second position in the housing, the tapered portion of the carrier smd enters the outwardly and forwardly diverging socket formed by the fingers, spreads the fingers apart, and permits them to snap toward each other in front of the transverse annular shoulder formed on the carrier smd. The smd is now permanently locked in the socket, and cannot be removed without rupturing the material used to make the smd on the fingers, or using a special tool. These and other aspects of the invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a longimdinal sectional view of the apparams with the carrier releasably locked in the forward or first position so the needle extends outwardly from the front end of the housing; FIG. 2 is a longimdinal sectional view of the housing before any assembly of the apparams;
FIG. 3 is a top view of the needle carrier and needle before assembly within the housing;
FIG. 4 is a view taken on line 4-4 of FIG. 3; FIG. 5 is a view taken on line 5-5 of FIG. 4; and
FIG. 6 is a longimdinal sectional view of the end cap before assembly in the rear end of the housing.
Referring to FIGS. 1 through 6, a cannula (hypodermic needle) 10 is secured at one end in a small bore 11 connecting with the interior of a hollow, generally cylindrical needle carrier 12 (FIGS. 1 and 5), which makes a sliding fit inside an elongated cylindrical and hollow housing 13, which has a cylindrical wall 14, a front (left as viewed in the drawing) end 15, and a rear (right as viewed in the drawing) end 16. The front end of the needle carrier includes a tapered Luer nozzle 17 shaped to make a snug fiction fit inside a conventional female Luer-Lock fitting 18 (FIG. 1) formed in a catheter hub 20, which carries a catheter 22 adapted to make a close sliding fit over the needle 10, which has a shaφ end 23 projecting slightly beyond the left end of the catheter.
The needle is secured in the small bore 11 by any suitable means, such as glue, spin- welding, or the like. The needle carrier includes an elongated cylindrical large bore 21 which communicates with the right open end of the needle. The large bore 21 serves as a flash chamber to receive blood once the tip of the needle enters a patient's vein. The housing and needle carrier are each made of a clear moldable plastic, such as polytetrafluoride, polyethylene, polypropylene, polystyrene, polycarbonate, and the like, to make it possible for the nurse to see "flash back" of blood entering the flash back chamber.
A conventional filter venting plug 24 sealed in the rear open end of the needle carrier is permeable to air to allow flash back, but prevents blood from entering the interior of the housing 13.
An elongated needle cover 26 makes a snap fit on the forward end of the housing 13 to cover the catheter and needle, the forward end of which projects slightly beyond the forward end of the catheter. The forward end of the needle is in the shape of a scarf or shaφ point. The rear end of the needle cover includes an inwardly extending annular boss 27, which makes a releasable snap fit in an annular groove 28 (FIG. 2) around the exterior surface of the forward end of the housing. The cover is made of plastic, and has a wall sufficiently thin that it can easily be deformed to snap into and out of releasable locking engagement with the forward end of the housing.
An acmator 29 on the needle carrier (FIGS. 3 and 4) includes a square (as viewed in FIG. 3) thumb tab 30 formed integrally with the outer end of a transverse rear shank 32, the inner end of which is secured to a transverse rectangular locking block 34 on the rear end of an elongated, longimdinal cantilever arm 36, the forward end of which is formed integrally with the outer end of transverse front shank 37 formed integrally at its inner end with the exterior of the needle carrier, which is of circular cross section (FIG. 5) of slightly smaller diameter than the housing interior diameter. A pair of longimdinally spaced and outwardly extending annular guides 38 formed integrally with the carrier make a close sliding fit in the housing to maintain coaxial alignment of the carrier in the housing.
As shown best in FIG. 5, the transverse dimension of the locking block 34 and cantilever arm 36 is slightly greater than that of the rear shank 32, which extends from the interior of the housing 13 through an elongated and longimdinally extending slot 39 in the housing wall 14. The cantilever acts as a spring, and normally is parallel to the longimdinal axis of the housing, as shown in FIG. 1.
The apparams is easily assembled to the position shown in FIG. 1 by inserting the needle and needle carrier into the rear (end) of the housing. The longimdinal axis of the needle carrier is positioned co-linearly with the central longimdinal axis 40 (FIGS. 1 & 2) of the housing, and the needle carrier is oriented so that the radially extending rear shank 32 on the needle carrier is aligned with the slot 39 in the housing wall. The transverse dimension of the rear shank is slightly less than that of the slot. The transverse dimension of the block 34 is slightly greater than that of the slot. Therefore, the thumb tab 30 is depressed slightly to deflect the rear end of the cantilever arm inwardly so that the upper surface of the block is just inside the inner surface of the housing to permit the needle carrier to be pushed forward into the housing interior by the application of longimdinal force to the needle carrier or thumb tab 30. The needle carrier moves forward (with the rear shank 32 sliding in slot 39 until the rear end of the cantilever arm 34 reaches a transverse notch 41 (FIG. 2) at the forward end of slot 39. The notch is slightly wider than the transverse dimension of the block on the rear end of the cantilever arm, and has a longimdinal dimension slightly greater than that of the locking block, which permits the rear end of the arm to snap outwardly and move the block into the notch 41. The block releasably locks the needle carrier against longimdinal movement within the housing unless the thumb tab 30 is depressed to move the block inwardly and out of the notch. The carrier can then be moved toward the rear end of the housing.
The outwardly extending circular guides 38 on the exterior of the needle carrier provide clearance for the cantilever arm to deflect at its rear end to a location within the housing wall and thus clear the block from the notch 41 and place the outer surface of the block within the inner surface of the housing wall.
With the needle carrier installed in the housing in the position shown in FIG. 1, an end cap 42 (FIGS. 1 and 6) is sonically welded inside the rear end of the housing. The end cap is made of a suitable plastic which permits sonic welding of it to the housing.
As shown best in FIGS. 1 and 6, the end cap includes a longimdinally extending sleeve 44 which makes a snug coaxial fit within the rear end of the housing, and which curves slightly inwardly in a forward direction. An outwardly extending annular flange 46 formed on the rear end of the sleeve has a forward face 48 welded to the rear end of the housing. A radially and longimdinally extending spacer 50 formed integrally with the sleeve and forward face of the flange makes a snug fit within the housing slot, and is also welded to the housing. The spacer helps maintain the uniform width of the slot in the housing to facilitate sliding the carrier as described below.
Four longimdinal slits 52 in the sleeve are located at equal intervals around the forward end of the sleeve, and each extend about halfway to the rear of the sleeve to form four longimdinally and inwardly converging and flexible fmgers 54. The front face of the front end of each finger slopes forwardly and outwardly to provide ramps 57 which converge inwardly toward the rear of the housing. Each fmger includes a short longimdinal section 58 at the inner end of a respective ramp 57. The sections 58 are equally spaced around the longimdinal axis 40 of the housing. A separate radially extending locking section 59, which is peφendicular to the longimdinal axis of the housing, is formed at its inner edge with the rear edge of a respective straight section 48 and terminates at its respective outer surface with the interior surface of the sleeve to form a separate locking tooth on each finger. The four fingers form a forwardly opening socket 60 with a forwardly diverging annular surface defined by the inner faces of the forward ends of the fingers. The rear end of the needle carrier includes a longimdinally extending barb-shaped locking smd 62 which has a frusto conical nose surface 64 which converges inwardly toward the rear end of the housing to facilitate penetration of the locking socket by the locking smd. An annular outwardly opening groove 64 in the locking smd a short distance forward of the rear end of the smd forms an annular and forwardly facing locking surface 66 which is peφendicular to the longimdinal axis of the housing.
As explained in more detail below, when the thumb tab 30 is depressed to release the forward lock, and the needle carrier is moved to the rear of the housing, the locking smd drives into the locking socket. The frusto conical surface 62 of the locking smd engages the matching interrupted frusto conical surface of the socket, and spreads the fingers 44 outwardly so the ramps of the fingers ride up over the surface, and permit each locking section 59 on a respective finger to drop into the annular notch 64 on the locking smd to permanently lock the needle carrier in the second or rear position where the carrier cannot be moved without rupturing the material which forms the permanent lock, or without use of a special tool (not shown) which can be inserted into the rear end of the socket to spread the fingers apart and permit the carrier to be released.
The various parts of the apparams can be made from the same or different kinds of molded plastics, as long as the cantilever arm on the carrier has suitable strength and resilience to act as a leaf spring and urge the locking block outwardly away from the longimdinal axis of the housing. The end cap and housing materials should be compatible for acoustic welding.
Once the device is assembled as shown in FIG. 1, it is then packaged and terminally sterilized.
In use, the nurse opens the package, prepares the patient's venipuncture site, removes needle cover 26, makes the venipuncture, and observes the blood flash back into the needle carrier 12. Holding the housing with one hand, the nurse advances the catheter and needle into the vein, having first slightly manipulated the catheter hub on the carrier nose to be sure that the two elements will separate easily. This manipulation is done carefully to prevent moving the catheter longimdinally far enough to extend beyond the shaφ point of the needle. Otherwise, there is the danger of damaging the catheter by thereafter trying to re-expose the shaφ end of the needle. Such damage could provide a site for formation of blood clots, which could be life threatening to the patient.
Once the catheter is in the desired position within the patient's vein, the nurse uses one hand to hold the catheter in that position, and with the other hand holding the housing, retracts the needle into the housing by pushing down on the thumb tab 30 to release the forward lock and thereafter sliding the thumb tab and needle carrier to the rear of the housing to drive the locking smd into the locking socket. This locks the needle carrier in the permanent locking position at the rear of the housing, which is sufficiently long to enclose the shaφ end of the needle. Thus, the housing acts as a "ShaφS box" for the potentially dangerous needle, which is now no longer exposed.
The apparams just described is easily operated with one hand by either holding the housing between the thumb and the middle finger and using the index finger to retract the tab, or the housing can be held in the palm of the hand with four fingers, and the tab retracted by sliding it back with the thumb. In either case, the other hand is free to hold the catheter in place in the patient's vein as the needle is retracted and permanently stored in the housing.
Moreover, the releasable lock for the needle carrier and the housing in the first position at the front of the housing is easily released by simply applying a slight radial and inward force on the tab, which unlocks the carrier from the housing without requiring any longimdinal force on the apparams. This eliminates the danger of inadvertently driving the catheter and needle entirely through the vein, as is the case with prior art devices which require the application of a longimdinal force to the housing or the carrier to unlock those two elements from the first position. By the time the carrier smd engages the socket, and requires longimdinal force to permanently lock the carrier to the housing end cap, the shaφ end of the needle is safely within the housing.

Claims

I CLAIM:
1. Apparams for intravenous insertion of a catheter in a patient, the apparams comprising: an elongated hollow housing defmed by a wall, and having a front end and a rear end, the housing including a central longimdinal axis; an elongated, longimdinal slot extending through the housing wall; a needle carrier disposed in the housing to slide between a first position and a second position in the housing, the carrier having a front end and a rear end; an elongated needle adapted to support a catheter, and secured at one end to the carrier so the other end of the needle extends from the housing when the carrier is in the first position; an acmator secured to the carrier and extending through the slot to the exterior of the housing so the carrier can be moved longimdinally in the housing; releasable locking means on the acmator and in the slot so the carrier can be releasably locked in the first position; and permanent locking means on the carrier and on the housing adjacent to second position so the second carrier can be permanently locked in the second position with the needle fully retracted into the housing.
2. Apparams according to claim 1 in which the permanent locking means includes an end cap at the rear end of the housing.
3. Apparams according to claim 1 which includes an end cap on the rear end of the housing, a socket formed on the end cap and opening toward the carrier, and a smd on the carrier adapted to enter the socket and permanently lock the carrier to the end cap when the carrier is in the second position in the housing.
4. Apparams according to claim 3 in which the socket includes longimdinally extending flexible fmgers secured to the end cap and extending toward the carrier in the housing, each finger having a tooth extending toward the longimdinal axis of the housing and being provided with a locking surface substantially peφendicular to the longimdinal axis of the housing, the smd including a nose section adapted to enter the socket and spread the fmgers apart, and a locking surface substantially peφendicular to the longimdinal axis of the housing and facing toward the front of the housing, and adapted to engage the locking surfaces on the teeth on the fingers which form the socket.
5. Apparams according to claims 2, 3 or 4 in which the end cap includes a sleeve extending toward the rear end of the carrier in the housing, the sleeve having a plurality of 5. Apparams according to claims 2, 3 or 4 in which the end cap includes a sleeve extending toward the rear end of the carrier in the housing, the sleeve having a plurality of longimdinally extending slits to form the fingers, and an annular flange formed on the rear end of the sleeve and adapted to fit against the rear end of the housing, the end cap and housing being bonded together.
6. Apparams according to claim 5 in which the end cap and housing are made of moldable plastic, and are bonded together by acoustic welding.
7. Apparams according to claim 4 in which the fingers each include ramp surfaces which diverge outwardly from each other toward the front of the housing to form a tapered entry for the smd nose section.
8. Apparams according to claims 1, 2, 3, 4, or 7 in which the longimdinally extending slot includes a transverse notch at the forward end of the slot, and the acmator includes a leaf spring secured at one end to the carrier, the other end of the leaf spring carrying a locking block which fits into the transverse notch at the forward end of the slot.
9. Apparams according to claim 1 in which the longimdinal slot includes a transverse notch at the forward end of the slot, and the acmator includes a radially extending front shank secured at an inner end to the carrier, an elongated longimdinally extending leaf spring secured at a forward end to the outer end of the front shank, a transverse locking block secured to the rear end of the leaf spring, and a radially extending rear shank secured at an inner end to the locking block, the outer end of the rear shank projecting to the exterior of the housing.
10. Apparams according to claims 1, 2, 3, 4, 6, 7, or 9 which includes a spacer secured in the slot at the rear end of the housing to help maintain the width of the slot substantially uniform during operation of the apparams.
PCT/US1996/012570 1995-08-03 1996-07-31 Retractable venipuncture catheter needle and receptacle WO1997005912A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67162/96A AU6716296A (en) 1995-08-03 1996-07-31 Retractable venipuncture catheter needle and receptacle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US187795P 1995-08-03 1995-08-03
US60/001,877 1995-08-03

Publications (3)

Publication Number Publication Date
WO1997005912A2 true WO1997005912A2 (en) 1997-02-20
WO1997005912A3 WO1997005912A3 (en) 1997-03-13
WO1997005912B1 WO1997005912B1 (en) 1997-05-22

Family

ID=21698240

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/012570 WO1997005912A2 (en) 1995-08-03 1996-07-31 Retractable venipuncture catheter needle and receptacle

Country Status (3)

Country Link
AU (1) AU6716296A (en)
TW (1) TW320564B (en)
WO (1) WO1997005912A2 (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030267A1 (en) * 1997-01-08 1998-07-16 Vadus, Inc. Needle protector
JP2005137888A (en) * 2003-11-07 2005-06-02 Kyo Meisei Intravenous catheter introducing device
EP1611916A1 (en) * 2004-07-01 2006-01-04 Ming-Jeng Shue Intravenous catheter introducing device
CN102989058A (en) * 2012-12-12 2013-03-27 江西三鑫医疗科技股份有限公司 Needle point shielding type anti-backflow venous indwelling needle
US8728035B2 (en) 2005-07-06 2014-05-20 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
EP2806910A4 (en) * 2012-01-27 2015-12-16 Sg Meditech Pte Ltd Placental blood extraction device
US9522254B2 (en) 2013-01-30 2016-12-20 Vascular Pathways, Inc. Systems and methods for venipuncture and catheter placement
US9616201B2 (en) 2011-01-31 2017-04-11 Vascular Pathways, Inc. Intravenous catheter and insertion device with reduced blood spatter
US9675784B2 (en) 2007-04-18 2017-06-13 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US9861792B2 (en) 2011-02-25 2018-01-09 C. R. Bard, Inc. Medical component insertion device including a retractable needle
US9872971B2 (en) 2010-05-14 2018-01-23 C. R. Bard, Inc. Guidewire extension system for a catheter placement device
US9950139B2 (en) 2010-05-14 2018-04-24 C. R. Bard, Inc. Catheter placement device including guidewire and catheter control elements
US10232146B2 (en) 2014-09-05 2019-03-19 C. R. Bard, Inc. Catheter insertion device including retractable needle
US10384039B2 (en) 2010-05-14 2019-08-20 C. R. Bard, Inc. Catheter insertion device including top-mounted advancement components
US10493262B2 (en) 2016-09-12 2019-12-03 C. R. Bard, Inc. Blood control for a catheter insertion device
USD903100S1 (en) 2015-05-01 2020-11-24 C. R. Bard, Inc. Catheter placement device
USD903101S1 (en) 2011-05-13 2020-11-24 C. R. Bard, Inc. Catheter
US11000678B2 (en) 2010-05-14 2021-05-11 C. R. Bard, Inc. Catheter placement device and method
USD921884S1 (en) 2018-07-27 2021-06-08 Bard Access Systems, Inc. Catheter insertion device
US11040176B2 (en) 2015-05-15 2021-06-22 C. R. Bard, Inc. Catheter placement device including an extensible needle safety component
US11291804B2 (en) 2007-04-18 2022-04-05 Smiths Medical Asd, Inc. Access device
USRE49056E1 (en) 2007-01-24 2022-05-03 Smiths Medical Asd, Inc. Access device
US11389626B2 (en) 2018-03-07 2022-07-19 Bard Access Systems, Inc. Guidewire advancement and blood flashback systems for a medical device insertion system
US11400260B2 (en) 2017-03-01 2022-08-02 C. R. Bard, Inc. Catheter insertion device
US11559665B2 (en) 2019-08-19 2023-01-24 Becton, Dickinson And Company Midline catheter placement device
US11925779B2 (en) 2010-05-14 2024-03-12 C. R. Bard, Inc. Catheter insertion device including top-mounted advancement components
US11931534B2 (en) 2021-09-09 2024-03-19 C. R. Bard, Inc. Medical component insertion device including a retractable needle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI573605B (en) * 2016-02-24 2017-03-11 Cc Biothechnology Corp Safety needle
WO2017147817A1 (en) 2016-03-02 2017-09-08 群康生技股份有限公司 Safety needle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053014A (en) * 1990-02-01 1991-10-01 Critikon, Inc. Catheter with controlled valve
US5176650A (en) * 1992-02-10 1993-01-05 Haining Michael L Intravenous catheter and insertion device
US5462533A (en) * 1993-07-23 1995-10-31 Becton, Dickinson And Company Self contained needle and shield

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053014A (en) * 1990-02-01 1991-10-01 Critikon, Inc. Catheter with controlled valve
US5176650A (en) * 1992-02-10 1993-01-05 Haining Michael L Intravenous catheter and insertion device
US5462533A (en) * 1993-07-23 1995-10-31 Becton, Dickinson And Company Self contained needle and shield

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030267A1 (en) * 1997-01-08 1998-07-16 Vadus, Inc. Needle protector
JP2005137888A (en) * 2003-11-07 2005-06-02 Kyo Meisei Intravenous catheter introducing device
US7044935B2 (en) 2003-11-07 2006-05-16 Ming-Jeng Shue Intravenous catheter introducing device
AU2004203878B2 (en) * 2003-11-07 2006-06-01 Deborah Huang Intravenous catheter introducing device
EP1611916A1 (en) * 2004-07-01 2006-01-04 Ming-Jeng Shue Intravenous catheter introducing device
EP1875940A1 (en) * 2004-07-01 2008-01-09 Ming-Jeng Shue Intravenous catheter introducing device
US10912930B2 (en) 2005-07-06 2021-02-09 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US11020571B2 (en) 2005-07-06 2021-06-01 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US9162037B2 (en) 2005-07-06 2015-10-20 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US11577054B2 (en) 2005-07-06 2023-02-14 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US8728035B2 (en) 2005-07-06 2014-05-20 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US11925778B2 (en) 2005-07-06 2024-03-12 Vascular Pathways, Inc. Intravenous catheter insertion device
US10220191B2 (en) 2005-07-06 2019-03-05 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
US10806906B2 (en) 2005-07-06 2020-10-20 Vascular Pathways, Inc. Intravenous catheter insertion device and method of use
USRE49056E1 (en) 2007-01-24 2022-05-03 Smiths Medical Asd, Inc. Access device
US9757540B2 (en) 2007-04-18 2017-09-12 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US9675784B2 (en) 2007-04-18 2017-06-13 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US11291804B2 (en) 2007-04-18 2022-04-05 Smiths Medical Asd, Inc. Access device
US10525236B2 (en) 2007-05-07 2020-01-07 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US10086171B2 (en) 2007-05-07 2018-10-02 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US10799680B2 (en) 2007-05-07 2020-10-13 Vascular Pathways, Inc. Intravenous catheter insertion and blood sample devices and method of use
US10688281B2 (en) 2010-05-14 2020-06-23 C. R. Bard, Inc. Catheter placement device including guidewire and catheter control elements
US9872971B2 (en) 2010-05-14 2018-01-23 C. R. Bard, Inc. Guidewire extension system for a catheter placement device
US11925779B2 (en) 2010-05-14 2024-03-12 C. R. Bard, Inc. Catheter insertion device including top-mounted advancement components
US11278702B2 (en) 2010-05-14 2022-03-22 C. R. Bard, Inc. Guidewire extension system for a catheter placement device
US10688280B2 (en) 2010-05-14 2020-06-23 C. R. Bard, Inc. Catheter placement device including guidewire and catheter control elements
US11135406B2 (en) 2010-05-14 2021-10-05 C. R. Bard, Inc. Catheter insertion device including top-mounted advancement components
US10722685B2 (en) 2010-05-14 2020-07-28 C. R. Bard, Inc. Catheter placement device including guidewire and catheter control elements
US11000678B2 (en) 2010-05-14 2021-05-11 C. R. Bard, Inc. Catheter placement device and method
US9950139B2 (en) 2010-05-14 2018-04-24 C. R. Bard, Inc. Catheter placement device including guidewire and catheter control elements
US10384039B2 (en) 2010-05-14 2019-08-20 C. R. Bard, Inc. Catheter insertion device including top-mounted advancement components
US11202886B2 (en) 2011-01-31 2021-12-21 Vascular Pathways, Inc. Intravenous catheter and insertion device with reduced blood spatter
US9616201B2 (en) 2011-01-31 2017-04-11 Vascular Pathways, Inc. Intravenous catheter and insertion device with reduced blood spatter
US10328239B2 (en) 2011-01-31 2019-06-25 Vascular Pathways, Inc. Intravenous catheter and insertion device with reduced blood spatter
US9861792B2 (en) 2011-02-25 2018-01-09 C. R. Bard, Inc. Medical component insertion device including a retractable needle
US11123524B2 (en) 2011-02-25 2021-09-21 C. R. Bard, Inc. Medical component insertion device including a retractable needle
USD903101S1 (en) 2011-05-13 2020-11-24 C. R. Bard, Inc. Catheter
EP2806910A4 (en) * 2012-01-27 2015-12-16 Sg Meditech Pte Ltd Placental blood extraction device
CN102989058A (en) * 2012-12-12 2013-03-27 江西三鑫医疗科技股份有限公司 Needle point shielding type anti-backflow venous indwelling needle
US10265507B2 (en) 2013-01-30 2019-04-23 Vascular Pathways, Inc. Systems and methods for venipuncture and catheter placement
US9522254B2 (en) 2013-01-30 2016-12-20 Vascular Pathways, Inc. Systems and methods for venipuncture and catheter placement
US11033719B2 (en) 2014-09-05 2021-06-15 C. R. Bard, Inc. Catheter insertion device including retractable needle
US10232146B2 (en) 2014-09-05 2019-03-19 C. R. Bard, Inc. Catheter insertion device including retractable needle
US11565089B2 (en) 2014-09-05 2023-01-31 C. R. Bard, Inc. Catheter insertion device including retractable needle
USD903100S1 (en) 2015-05-01 2020-11-24 C. R. Bard, Inc. Catheter placement device
US11040176B2 (en) 2015-05-15 2021-06-22 C. R. Bard, Inc. Catheter placement device including an extensible needle safety component
US11759618B2 (en) 2016-09-12 2023-09-19 C. R. Bard, Inc. Blood control for a catheter insertion device
US10493262B2 (en) 2016-09-12 2019-12-03 C. R. Bard, Inc. Blood control for a catheter insertion device
US11400260B2 (en) 2017-03-01 2022-08-02 C. R. Bard, Inc. Catheter insertion device
US11389626B2 (en) 2018-03-07 2022-07-19 Bard Access Systems, Inc. Guidewire advancement and blood flashback systems for a medical device insertion system
USD921884S1 (en) 2018-07-27 2021-06-08 Bard Access Systems, Inc. Catheter insertion device
US11559665B2 (en) 2019-08-19 2023-01-24 Becton, Dickinson And Company Midline catheter placement device
US11883615B2 (en) 2019-08-19 2024-01-30 Becton, Dickinson And Company Midline catheter placement device
US11931534B2 (en) 2021-09-09 2024-03-19 C. R. Bard, Inc. Medical component insertion device including a retractable needle

Also Published As

Publication number Publication date
AU6716296A (en) 1997-03-05
WO1997005912A3 (en) 1997-03-13
TW320564B (en) 1997-11-21

Similar Documents

Publication Publication Date Title
WO1997005912A2 (en) Retractable venipuncture catheter needle and receptacle
US7101355B2 (en) Passive needle guard for syringes
US8048031B2 (en) IV catheter introducer
US5688253A (en) Needle locking system
US6623459B1 (en) Passive needle guard for syringes
EP0510187B1 (en) Catheter assembly having safety means and method for using same
US5007901A (en) Intravenous catheter insertion device
EP0719564B1 (en) Safety device for use in inserting a cannula
EP1569708B1 (en) Iv catheter introducer with retractable needle
CA2254174C (en) Single-use safety syringe
EP0830872B1 (en) Motion lock for insertion needle of a safety catheter
EP0343803A2 (en) Safety introduction means for catheter
US20040030294A1 (en) Retractable needle single use safety syringe
JPH10127767A (en) Needle assembly provided with needle barrier which can be operated by one hand
NZ223656A (en) Catheter placement device: includes needle guard
EP1596906B1 (en) Tamper evident needle guard for syringes
US20040116864A1 (en) Catheter introducer assembly having safety shielded needle before and after use
JPH0724071A (en) Blood vessel indwelling catheter
US6117110A (en) Catheter needle safety device and method of using same
CA3100592C (en) Reuse prevention safety catheter

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM

AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase in:

Ref country code: CA

122 Ep: pct application non-entry in european phase