EP0814856A1 - Gaine protectrice d'aiguille facile a utiliser - Google Patents

Gaine protectrice d'aiguille facile a utiliser

Info

Publication number
EP0814856A1
EP0814856A1 EP96945083A EP96945083A EP0814856A1 EP 0814856 A1 EP0814856 A1 EP 0814856A1 EP 96945083 A EP96945083 A EP 96945083A EP 96945083 A EP96945083 A EP 96945083A EP 0814856 A1 EP0814856 A1 EP 0814856A1
Authority
EP
European Patent Office
Prior art keywords
sheath
needle
top wall
slots
slot
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96945083A
Other languages
German (de)
English (en)
Other versions
EP0814856A4 (fr
Inventor
David S. Utterberg
William J. Schnell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DSU Medical Corp
Original Assignee
Medisystems Technology Corp
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
Priority claimed from US08/584,451 external-priority patent/US5704924A/en
Priority claimed from US08/714,959 external-priority patent/US5772638A/en
Application filed by Medisystems Technology Corp filed Critical Medisystems Technology Corp
Publication of EP0814856A1 publication Critical patent/EP0814856A1/fr
Publication of EP0814856A4 publication Critical patent/EP0814856A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0637—Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631—Devices 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • A61M2005/3249—Means to disalign the needle tip and the distal needle passage of a needle protection sleeve
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3271—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
    • A61M5/3272—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position having projections following labyrinth paths

Definitions

  • needle protector sheaths are known. Particularly, needle protector sheaths for winged needles are presently in clinical use, in which the wings of the needle project outwardly through slits defined in the sheath, so that the sheath can slide from a retracted position while the needle is in use to an advanced positioned in which the needle is enclosed, the sheath being locked in that position so that the point of the needle is recessed in the sheath and cannot cause accidental injury.
  • fistula needles for hemodialysis and the like
  • some nurses insert the needle into a patient with the bevelled tip of the needle end facing up, and some insert the needle with the bevelled tip down.
  • this can significantly affect the utility of the guard in catching and holding the needle as it is withdrawn from the patient in the customary manner.
  • Most current fistula needle wings project from their hub from a position that is laterally spaced from the center line defining the needle axis.
  • the wing may pass through the slots of the guard with most of the needle and hub being positioned above the slots (when viewed from the side) .
  • the needle and hub will be positioned mostly below the slot. In each case, of course, the wings will occupy the slot, but the positioning of the rest of the needle and the hub may be substantially changed.
  • a new type of catch is provided, which is more forgiving to flexing of the medical needle protector sheath of this invention, and which more reliably holds the wings of needles, thus preventing them from being accidentally removed from the sheath or accidentally allowing the needle point to project laterally outward through the slots.
  • the prior art needle sheaths often utilize an "anchor" as typically taught in Utterberg et al. U.S. Patent No. 5,112,311.
  • the nurse presses the site of needle entry with a wad of gauze, while bringing the needle sheath up to a position where one of her fingers can press on or otherwise grasp the forwardly projecting "anchor".
  • the nurse pulls the needle tubing, causing the needle to withdraw and to retract back into locked relation with the slotted sheath, while the sheath is prevented from retraction by the manual pressure on the anchor.
  • the nurse does not want to reduce finger pressure on the gauze, which is preventing bleeding at the needle access point. In the prior art, this means that the nurse cannot conveniently release the anchor so that the needle and set can be removed without a reduction in finger pressure.
  • the advantages of an anchor on the slotted sheath may be achieved, but at the same time the sheath and needle may be removed without the nurse letting up on the finger pressure on the gauze.
  • the protector sheath of this invention holds the needle in a locked relation in which the needle extends upwardly into substantial engagement with the top wall of the sheath.
  • a medical needle protector sheath comprises a body having a top wall, side walls, an open first end, and a slot formed in each side wall to receive a needle wing extending through each of the slots.
  • the slots extend from the first end toward a second end opposed to the first end, with the slots terminating in the side walls at closed end points which are spaced from the second end.
  • first portions of the slots are positioned adjacent to the end points, the first slot portions sloping away from the top wall as the slots extend toward the second end.
  • the protector sheath further preferably comprises a bottom wall which is connected to the side walls.
  • the bottom wall may be spaced inwardly from the second end of the sheath to define a recess. This can permit a needle and hub positioned in the sheath, particularly with the needle wings positioned in the first, sloping slot portions, to be tilted so that the needle tip preferably engages and can dig into the top wall. As this takes place, the hub may occupy at least some of the recess defined by the inward spacing of the bottom wall.
  • an end wall is defined at the second end of the sheath.
  • This end wall extends from the vicinity of the top wall, and is preferably integral therewith.
  • the end wall may define a smooth, downwardly extending curve from the top wall, or may be of another shape, extending downwardly to a position above the bottom wall to provide room for the needle hub and connected tubing to extend out of the second end of the sheath.
  • the end wall firmly holds and constrains the needle and hub in a desired acute angle to the top wall, which acute angle may correspond to a lesser or egual angle of the first portions of the slots.
  • the needle hub or its tubing may abut the lower edge of the end wall, which prevents it from being raised or rotated about its wings to put the needle and hub into a more parallel relation with the protector sheath.
  • the needle and hub may constrained against rotation in the other direction by the impinging of the needle or its tip against the top wall of the sheath.
  • the needle and hub may not only be retained in firm, non-moving relation to the sheath by conventional first catch projections defined in the first portions of the slots, but it can be held against rotation relative to the sheath by the points of impingement at the bottom of the end wall and between the needle point and the top wall.
  • the slots are positioned adjacent to the first slot portions but nearer to the first end than the first slot portions.
  • These optional second slot portions define a greater slot width than other slot portions, to permit a degree of free vertical rotation of the wings of a medical needle which occupy the second slot portion.
  • the needle occupies the second slot portion, it can rotate with ease through a certain, constrained angle.
  • most of the parts of the slots positioned between the first slot portion and the first sheath end slope toward the top wall as the slots extend towards the second end.
  • Such a slot shape without the second portions is taught in the Utterberg U.S. Patent Nos. 5,562,636 and 5,562,637.
  • the needle and hub Since the respective slots first extend upwardly toward the top wall, and then curve downwardly again away from the top wall, the needle and hub must rotate as their wings slide along the slots, when the needle is being retracted into the sheath.
  • an upstanding handle for manual retention of the sheath to project from the top wall at or near the first end of the sheath.
  • This provides a better grip on the sheath than has been previously provided, so that the needle may be pulled from its position within the patient by pulling the connected tube, causing the needle to retract to slide along the slots, and to latch into position with a discernable snap. This indicates reliable latching of the sheath in protective position around the needle. While one finger holds the upstanding handle, other fingers of the user may press overlying gauze (as generally described in the previously cited Utterberg U.S. Patent No. 5,112,311) to suppress bleeding after needle removal in conventional manner.
  • the upstanding handle may be a finger ring.
  • the handle may be defined on a forward extension of the top wall which extends forwardly beyond the side walls at the first end.
  • the top wall of the sheath may define an elevated portion adjacent to the first end, which correspondingly provides an elevated space inside the sheath. This permits use of the sheath with longer needles, providing a broader range of needle lengths with which a single protector sheath may be used.
  • the sidewalls define at least one catch projection which is spaced from the closed ends of the slots, to prevent needle wings that occupy the first slot portions from easily sliding away from the first slot portions.
  • the catch projection defines an elongated member having a first end that defines a wing catching tip extending into one of the slots.
  • the elongated member is attached to the sidewall only at an elongated member end that is opposed to the first end, to permit the elongated member to flex in the sidewall plane. Also, the elongated member preferably extends into a direction that defines an acute angle to at least the majority of the top wall, with the first end facing the first slot portion.
  • the wing catching tip of the elongated member is either in contact with the upper surface of the slot or in close proximity thereto.
  • the first slot portions extend at an acute angle away from the top wall from the vicinity of the elongated members to the closed slot ends.
  • the sheath may further comprise a bottom wall, and an end wall at the one body end which is adjacent to the slot closed end portions.
  • the end wall extends from the vicinity of the top wall downwardly to a position above the bottom wall, if present or otherwise above the bottoms of the sidewalls, so that, as a result of this, the needle and hub may be held in the sheath at an acute angle to the top wall when the wings occupy the first slot portions.
  • portions of the slots which are more remotely spaced from the end wall than the elongated member may extend from the vicinity of the elongated member in an acute angle away from the top wall to open slot ends at the needle protector sheath end which is opposed to the one end.
  • the sheath may also have a flexible, upstanding handle which is preferably of C-shape, for manual retention of the sheath.
  • This handle may project from the top wall adjacent the end of the sheath which is opposed to the one end.
  • the handle may communicate with the top wall of the sheath through a line of flexing weakness, to facilitate the flexibility of the handle.
  • the handle may have sufficient stiffness to permit the needle to be pulled into the sheath and locked therein, but the handle is sufficiently flexible so that the sheath may be removed from the finger that the handle engages by flexing without a need to move the finger.
  • the sheath may also be made of a flexible plastic so that it can receive and hold winged needles of a variety of shape configurations, which includes, as previously discussed, needles which are of differing dimension relative to the plane of the wings, when inverted.
  • the elongated member may carry a longitudinal strengthening rib.
  • Fig. 1 is an elevational view of a first embodiment of the needle sheath of this invention
  • Fig. 2 is an elevational view of a second embodiment of the needle sheath of this invention, showing a needle carried therein;
  • Fig. 3 is an end elevational view of the needle sheath of Fig. 1 and Fig. 2;
  • Fig. 4 is a bottom plan view of the needle sheath of Fig. 1 and Fig. 2;
  • Fig. 5 is a side elevational view of a third embodiment of the needle sheath of this invention.
  • Fig. 6 is a side elevational view of a fourth embodiment of the needle sheath of this invention.
  • Fig. 7 is a perspective view of a needle sheath of this invention, carried on a fistula set for hemodialysis;
  • Fig. 8 is an enlarged elevational view of the first or back end of the sheath, showing how a wing of the needle, shown in section, can move to the first slot portion adjacent the one end of the body;
  • Fig. 9 is an enlarged elevational view of the complete protector sheath, showing how the wing of the needle is held in position within the first slot portion by the catch projection;
  • Fig. 1-6 shows a hollow needle sheath 10 which has a top wall 12, side walls 14, 16, and a bottom wall 18, being positioned in rectangular array in a manner similar to that shown in Fig. 3. Needle sheath 10 also defines an inner bore or lumen 20 of generally rectangular shape, being at least partially open at each end.
  • Sheath 10 also defines slots 22 extending through first end 24 of the sheath and extending toward second end 26.
  • Each of slots 22 are of substantially identical shape and terminate at respective end points 28 at a position spaced from second end 26.
  • sheath 10 may be threaded on a winged needle which is connected to a tube in conventional manner.
  • the needle may be originally positioned in the venous system of a patient. Thus, when the needle is withdrawn, it slides to the rear, with the wings entering slots 22 or 22a. Initially the needle is angled slightly upwardly as it occupies the skin of the patient, similar to that shown in Fig. 14 of Utterberg Patent No. 5,112,311, at an angle approximately parallel to the forward section 30 of slot 22 as it rests on the skin of the patient. Thus, as the needle is pulled backwards out of the patient, it slides diagonally upwardly along forward slot sections 30, 30a in a manner that minimizes twisting and bending of the needle while the needle tip remains in the patient.
  • Fig. 2 shows a needle sheath similar in its basic construction to that of Fig. 1 except for the construction of upstanding handle 44, 44a, carried on a forward extension 39, 38 of upper wall 12, 12a.
  • the needle is pulled backwards into snap-fit relation with a first section 40, 40a of the slots, which section carries a generally conventional catch projection 42, 42a for retention of the wings in the respective first slot sections 40, 40a.
  • the presence of the widened second slot section 32, 32a permits the spontaneous rotation and the easy transition of the needle and wings to a different angle as the needle is drawn backwards into sheath 10 and into locking relation therewith in first slot section 40. Thus, the necessary pulling force to accomplish this is reduced.
  • Upstanding handle 44 of Fig. 1 simply represents an upwardly turned projection which may be retained by the finger of the user's hand.
  • the user is covering the needle injection site of the patient with gauze pads.
  • one can remove the needle from the patient by pulling the hub or its connected tubing 58, causing the needle to retract into the sheath.
  • the upstanding handle 44a may be a hollow tube or a ring, preferably of approximately the width of sheath 10a as shown in Fig. 4.
  • the various reference numerals of Figs. 2 and 4 which end with suffix "a" correspond to the parts referred above by the corresponding numbers of Figs. 1 and 3 without the suffix.
  • bottom wall 18a of Figs. 2 and 4 correspond to bottom wall 18 of the Fig. 1 embodiment.
  • Both of the embodiments of Figs. 1 and 2 define a bottom wall 18, 18a which are connected to the side walls, but are spaced inwardly from the second end 26, 26a to form an optional recess 46, 46a. Coupled with this, it is preferred for an end wall 48, 48a to connect with the top wall 12, 12a and to curve downwardly from the top wall to a bottom position 49 above bottom wall 18, 18a that permits winged needle and hub assembly 50 to extend into the bore 20 underneath end walls 48, 48a.
  • the wings 52 of assembly 50 are held in an angle to the longitudinal axis of sheath 10, 10a as they occupy first portion 40, 40a of the slots, which first portion occupies a similar angle.
  • end wall 48 prevents assembly 50 from rotating upwardly by flexing wings 52, because such counterclockwise rotational motion is prevented by the abutment of assembly 50 against the lower edge of end wall 48 or 48a.
  • needle and hub 50 does not have to abut end wall 48. It may be spaced from it.
  • the upwardly angled needle point 56 preferably presses against top wall 12a, being directed there by the angle and position of slot portions 40a and the position of the lower edge of end wall 48a.
  • needle tip 56 presses against top wall 12, 12a when in its fully retracted and locked position, with the wings being locked in generally conventional manner in first slot portion 40a.
  • the aperture 46a in the bottom wall makes is possible for needle assembly 50 to project slightly below the side walls as necessary to achieve this configuration. Also, if desired, the wall that defines aperture 46a may serve as a secondary catch for the annular face of the tubing 58 to which the needle is attached.
  • Sheath 10b can be of identical structure to that of the previous designs except as otherwise described herein. The difference lies near the first end of sheath 10b, while slot 22b and most of the length of the respective walls can be identical to the above. It can be seen that on the left side of the sheath of Fig. 5, the extension of top wall 38, 39 has been eliminated, and a different, upstanding handle 60 is provided in the form of a finger ring which attaches to top wall 12b at two different places 62, 64.
  • top wall 12b defines an externally and internally elevated portion 66, which allows longer needles 56a or shorter needles to be retained in the same guard, with their respective wings 52a sliding along the slot 22b into first slot portion 40b with substantially the same catchment angle as shorter needles.
  • Upstanding finger ring 60 provides good ergonomic characteristics, which isolate the needle withdrawal traction forces that may be resisted by the finger in ring 60 from the needed pressure on the overlying gauze by other fingers, as the needle is being withdrawn from the patient, to provide hemostasis.
  • sheath 10b can be of identical design, and can work in a manner identical to, the sheaths of the previous embodiments.
  • the needle 56a may be placed into the sheath 18a with a point inverted from the position of needle point 56. Either position is suitable for these sheaths.
  • sheath 10c may be of similar structure and function to the previous sheaths except as otherwise described herein.
  • the end wall 48c at the second end of sheath 10c partly but not completely blocks the bore extending through the hollow sheath 10c, to serve as a structure equivalent to end walls 48, 48a for similar purposes of holding the rotational orientation of a needle and hub 50 captured within the sheath.
  • end wall 48c may be an angled straight wall, rather than a curved wall as in the previous embodiments, extending down to bottom position 54c.
  • the upstanding handle for manual retention 60c comprises a partial arc attached to the rest of sheath 10c at only one end, as shown.
  • This structure is also suitable for being gripped with one finger to hold sheath 10c in its desired position as the needle is being pulled out of the patient and into retracted relation within the sheath 10c.
  • Upstanding handle members 60, 60c have widths preferably substantially identical to the widths of sheaths 10b, 10c in a manner similar to that generally indicated in Fig. 3, although other widths may be used if desired.
  • a sheath for winged medical needles in which the needle may be comfortably and reliably pulled from the patient while the sheath is manually retained with a finger, and the wings slip into the respective slots 22, to encourage the needle to withdraw from the patients' skin at a shallow angle which approximates the axis of the needle in the skin. This reduces pain.
  • the needle wings are being withdrawn through slots 22 and enter into the second slot section 32, the needle can spontaneously rotate through a small angle so that the wings become more parallel to the direction of first slot section 40 which extends at a different angle.
  • the needle is thus rotated upwardly so that its tip can press against the lower surface of the upper wall 12, being held there so that the needle cannot accidentally pass through one of the slots to the exterior.
  • medical needle protector sheath 100 is shown to be carried on tubing 120 of a conventional winged needle fistula set 140, having a needle 16, closed with a removable needle guard 180,, and having wings 200 projecting outwardly from hub 170.
  • the tubing 120 can be seen to be extending entirely through the hollow interior of protector sheath 100.
  • Protector sheath 100 comprises a body having a top wall 220, sidewalls 240, and a slot 260 formed in each sidewall to receive a needle wing 200 as the needle is retracted from the patient rearwardly into protector sheath 100 and held there by latching of the wings.
  • the respective slots 260 define first slot portions 280, each of the first slot portions having one closed end 290 adjacent one end 300 of the body of sheath 100.
  • the respective sidewalls 240 each define a catch projection 320, each of which is spaced from the respective closed end 290 of slot portion 280, and which serves to prevent needle wings that occupy first slot portions 280 from easily sliding away from the first slot portions.
  • Catch projections 320 are also sufficiently flexible, as particularly shown in Fig. 8, to be deflected downwardly as the respective needle wings 200 slide from the open mouth 340 of slots 260, along the slots, to enter the first slot portions 280 by deflection of catch projections 320 as in Fig. 8. Then, as shown in Fig.
  • catch projections 320 can spring back into their original configuration in which a wing catching tip 330 of the catch projection 320 is either in contact with the upper surface 360 of slot 280 or in close proximity thereto, less than the thickness of the wings 200.
  • the respective wings 200 are not easily removed from their occupancy of the first slot portions 280 once they have entered the first slot portions.
  • the sharp point of needle 160 is also retained within the protector sheath, typically being pressed against the underside of top wall 220 because the first slot portions 280 extend at an acute angle away from top wall 220 from the vicinity of elongated members 320 to the closed ends 290, as shown in phantom lines 160 in Fig. 9.
  • this acute angle is about 5 to 20 degrees.
  • end wall 400 presses tube 120 to help hold needle 160 upto engage the top wall 220.
  • Elongated member 320 may carry a longitudinal strengthening rib 330.
  • Sheath 100 also comprises a bottom wall 380 and an end wall 400 at and adjacent the one body end 300.
  • End wall 400 extends from the vicinity of top wall 220 downwardly in an angled manner to a position above bottom wall 380, so that an aperture 420 is provided in a lower portion of the sheath, through which tubing 120 can extend.
  • tubing 12 is thus forced downwardly by endwall 400, away from top wall 220, which, in turn, facilitates the forcing of the needle 160 to upwardly rotate at flexible wings 200, to assure an upward position of needle 160 as shown in Fig. 9 so that the sharp point is well out of harm's way, and also to prevent the sharp needle point from accidentally projecting outwardly through one of slots 260.
  • the remaining portions 440 of slots 260 may extend from the vicinity of elongated member 320 in an acute angle away from top wall 220 to the open slot ends 340.
  • this acute angle is also about 5 to 20 degrees, as is the corresponding acute angle of first slot portion 280.
  • an integral, flexible, upstanding handle 460 may be carried, for manual retention of the sheath.
  • the flexibility of handle 460 may be enhanced by the presence of a transverse line of flexing weakness 480.
  • the medical needle protector sheath of this invention may comprise a single, integrally molded piece made of a plastic which is somewhat flexible at the dimensions used.
  • the sheath can be used with winged needles in which the wings 20 are spaced from the longitudinal axis of the set as defined by the axis of needle 16 irrespective of whether the needle and set are in use with the bevelled tip 50 facing downwardly as shown in Fig. 7 or in an inverted position where the bevelled tip 50 faces upwardly.
  • the flexibility of sheath 100 can accommodate the differing dimensions or location of the wings in these two circumstances because of the design of the elongated member 320 of the catch projection, as shown.
  • the front surface 520 of elongated member 320 is angled slightly forwardly from bottom to top so that when wing 200 is attempted to be retracted along the slots toward their mouths 340, the elongated member 320 of the catch projection is forced upwardly by the wing to engage the upper wall 360 of slot portion 280.
  • no amount of pulling, apart from destruction can cause wings 200 to be dislodged out of their locked position, and this situation continues to hold even when the sheath is twisted, opened, or otherwise manually deformed.
  • the fistula needle 160 is positioned in the vein of a patient, and the wings are strapped to the skin.
  • the wings are released from their adhesive tape straps; a wad of gauze is placed on the puncture site of the needle to the skin; and the nurse presses the gauze on that point while hooking one finger around upstanding handle 460. Then, the nurse simply pulls on tubing 120 to withdraw needle 160, causing the needle and wings to retract back into protector sheath 100, with the wings 200 sliding through slots 260.
  • the acute angle of slot 260 is present to match the approximate angle of needle 16 to the skin of the patient, so that the needle is not twisted as it is withdrawn.
  • first slot portion 280 occupies an acute angle of opposite sense to the acute angle of the rest of slot 260, and also because of the presence of wall 400 that forces tube 120 downwardly, needle 160 is forced to rotate upwardly so that the tip impacts against the lower surface of wall 220, where it is firmly held out of harm's way.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Vascular Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Gaine protectrice (10) d'aiguille médicale comprenant un corps pourvu d'une paroi supérieure (12), de parois latérales (14, 16), d'une première extrémité ouverte (24) et de fentes (22) formées dans chaque paroi latérale qui reçoivent une ailette d'aiguille s'étendant dans chacune des fentes. Ces fentes s'étendent de la première extrémité jusqu'à une seconde extrémité (26) de la gaine opposée à la première, et se terminent dans les parois latérales au niveau de points terminaux qui sont espacés de la seconde extrémité. Généralement, les premières sections (40) des fentes adjacentes aux points terminaux s'écartent de la paroi supérieure en descendant tandis que les fentes s'étendent vers la seconde extrémité. D'autres sections (30) des fentes sont inclinées vers la partie supérieure tandis que les fentes s'étendent vers la seconde extrémité (26). Les diverses améliorations décrites dans cette invention permettent d'utiliser sans danger et plus facilement la gaine protectrice d'une aiguille.
EP96945083A 1996-01-11 1996-12-20 Gaine protectrice d'aiguille facile a utiliser Withdrawn EP0814856A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US584451 1996-01-11
US08/584,451 US5704924A (en) 1996-01-11 1996-01-11 Easy use needle protector sheath
US08/714,959 US5772638A (en) 1996-09-17 1996-09-17 Protector for needle
US714959 1996-09-17
PCT/US1996/020740 WO1997025082A1 (fr) 1996-01-11 1996-12-20 Gaine protectrice d'aiguille facile a utiliser

Publications (2)

Publication Number Publication Date
EP0814856A1 true EP0814856A1 (fr) 1998-01-07
EP0814856A4 EP0814856A4 (fr) 2000-02-02

Family

ID=27079102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945083A Withdrawn EP0814856A4 (fr) 1996-01-11 1996-12-20 Gaine protectrice d'aiguille facile a utiliser

Country Status (7)

Country Link
EP (1) EP0814856A4 (fr)
JP (1) JP3809563B2 (fr)
KR (1) KR19980702900A (fr)
AU (1) AU717410B2 (fr)
CA (1) CA2214989A1 (fr)
MX (1) MX9706905A (fr)
WO (1) WO1997025082A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1311489B1 (it) * 1998-10-12 2002-03-13 Francesco Rigon Dispositivo per la protezione dopo l'uso di un ago ipodermico,particolarmente del tipo a farfalla.
US6235005B1 (en) * 1998-12-28 2001-05-22 Ethicon, Inc. Positive engagement-disengagement catheter sleeve
DE10156587B4 (de) * 2001-11-20 2004-05-06 Sarstedt Ag & Co. Abdeckgehäuse einer Flügelkanüle
US7175610B2 (en) 2003-03-20 2007-02-13 Nipro Corporation Protector sheath for winged-needle
US20160129225A1 (en) 2013-07-29 2016-05-12 Kawasumi Laboratories, Inc. Needle cover and winged needle with needle cover
TWI720808B (zh) * 2020-02-05 2021-03-01 善德生化科技股份有限公司 翼型針具之保護套

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459953A1 (fr) * 1990-05-29 1991-12-04 Giuseppe Barbieri Dispositif d'infusion jetable à usage unique avec capuchon pour l'aiguille après usage
US5330438A (en) * 1993-10-08 1994-07-19 Gollobin Peter J Protective sheath for butterfly needles and IV infusion set and sheath assembly
EP0645159A1 (fr) * 1993-09-28 1995-03-29 Critikon, Inc. Cathéter avec protection contre une piqûre
WO1995024232A1 (fr) * 1994-03-09 1995-09-14 Noble House Group Pty. Ltd. Ensemble protecteur
WO1995028979A1 (fr) * 1994-04-20 1995-11-02 Noble House Group Pty. Ltd. Dispositif de protection

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935011A (en) * 1987-09-29 1990-06-19 City Of Hope Sheath for intravenous needle
JPH03505293A (ja) * 1988-09-30 1991-11-21 ウッターバーグ、デビッド，エス ガードされた翼状針アセンブリ
US5092461A (en) * 1988-11-08 1992-03-03 Adam John M Needle cover assembly
US4941881A (en) 1989-08-23 1990-07-17 Masters Edwin J IV infusion set with sheath
DE4008392A1 (de) * 1990-03-16 1991-09-19 Vygon Gmbh & Co Kg Aufnahmevorrichtung fuer eine stahlkanuele
US5120320A (en) 1991-02-13 1992-06-09 Becton, Dickinson And Company I.V. infusion or blood collection assembly with automatic safety feature
US5350368A (en) 1992-12-17 1994-09-27 Shields Jack W Tethered butterfly needle trap
US5562636A (en) 1994-07-15 1996-10-08 Utterberg; David S. Needle protector sheath
US5562637A (en) 1994-07-15 1996-10-08 Utterberg; David S. Needle protector sheath

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459953A1 (fr) * 1990-05-29 1991-12-04 Giuseppe Barbieri Dispositif d'infusion jetable à usage unique avec capuchon pour l'aiguille après usage
EP0645159A1 (fr) * 1993-09-28 1995-03-29 Critikon, Inc. Cathéter avec protection contre une piqûre
US5330438A (en) * 1993-10-08 1994-07-19 Gollobin Peter J Protective sheath for butterfly needles and IV infusion set and sheath assembly
WO1995024232A1 (fr) * 1994-03-09 1995-09-14 Noble House Group Pty. Ltd. Ensemble protecteur
WO1995028979A1 (fr) * 1994-04-20 1995-11-02 Noble House Group Pty. Ltd. Dispositif de protection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9725082A1 *

Also Published As

Publication number Publication date
KR19980702900A (ko) 1998-09-05
MX9706905A (es) 1998-02-28
JP3809563B2 (ja) 2006-08-16
JPH11506036A (ja) 1999-06-02
WO1997025082A1 (fr) 1997-07-17
AU1353697A (en) 1997-08-01
EP0814856A4 (fr) 2000-02-02
AU717410B2 (en) 2000-03-23
CA2214989A1 (fr) 1997-07-17

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