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WO1993018809A1 - Protection pour aiguille medicale - Google Patents

Protection pour aiguille medicale Download PDF

Info

Publication number
WO1993018809A1
WO1993018809A1 PCT/GB1993/000543 GB9300543W WO9318809A1 WO 1993018809 A1 WO1993018809 A1 WO 1993018809A1 GB 9300543 W GB9300543 W GB 9300543W WO 9318809 A1 WO9318809 A1 WO 9318809A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
shield
guard
tip
lip
Prior art date
Application number
PCT/GB1993/000543
Other languages
English (en)
Inventor
William Frost Robertson
Original Assignee
Robson Peter
William Frost Robertson
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 Robson Peter, William Frost Robertson filed Critical Robson Peter
Publication of WO1993018809A1 publication Critical patent/WO1993018809A1/fr

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
    • 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
    • A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
    • 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
    • A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
    • A61M5/3219—Semi-automatic repositioning of the cap, i.e. in which the repositioning of the cap to the needle covering position requires a deliberate action by the user to trigger the repositioning of the cap, e.g. manual release of spring-biased cap repositioning means

Definitions

  • the present invention relates to a guard for a hypodermic needle for use in the prevention of accidental needle-stick injuries.
  • syringes To protect medical personnel from accidental needle-stick injuries, several different types of needle assemblies have been proposed for use with syringes and cannulas.
  • a syringe needle is automatically withdrawn into the barrel of the syringe on release of the syringe plunger.
  • a sleeve covering the barrel can be moved to cover the needle after an injection has taken place.
  • the needle assembly is provided with a protective cap which can be moved from a position adjacent the needle tip to one over the needle point after use.
  • all these conventional arrangements suffer from at least one of two serious disadvantages: they are either expensive to manufacture, or they are not fail safe as they require the person using the needle to take some positive action to cover the needle tip after use.
  • the object of the present invention is to provide a device for use in the prevention of needle-stick injuries which obviates or substantially mitigates the afore-mentioned disadvantages.
  • a guard for a needle comprising a hub for attachment to a needle or a needle carrier and a shield which is adapted to lie adjacent the needle and which is provided with a lip that projects outwardly from the shield so as to cover the tip of the needle when the needle is not in use, the shield being capable of moving away from the needle to uncover the tip as the needle penetrates the body of a patient and of resiling back towards the needle as it is withdrawn from the patient so that the lip can again cover the tip.
  • the shield can flex away from the needle to uncover the tip when the needle is in use as it penetrates the body of a patient.
  • the shield is provided with a locking arrangement which can be used to lock the shield in position with respect to the needle after use.
  • the locking arrangement comprises a receptacle for the needle accessible via a keyhole through which the needle can be manoeuvred by the application of pressure thereto.
  • the locking arrangement is provided with a non-return means which hinders exit of the needle from the receptacle.
  • a needle assembly comprising a guard according to the first aspect of the present invention.
  • Figs. 1 and 2 are side and plan views respectively of a guard according to the invention
  • Fig. 3 is an end view of the guard shown in Figs 1 and 2 but to an enlarged scale and with a portion broken away to reveal the detail of a locking device;
  • Figs. 4 to 7 are a sequence of plan and side schematic views of a needle assembly comprising the guard in a sequence prior to, during and after its use, parts being broken away in Fig. 5 to reveal the needle tip;
  • Figs. 8 to 10 each show a modified guard in combination with one of various conventional needle assemblies.
  • the guard comprises a hub 1 and a flexible resilient shield 2 incorporating a protective lip 3.
  • the guard is a one-piece plastics moulding but it could be made in any manner in one piece or in parts from suitable materials.
  • the guard can be made for fitment to a needle or directly to a needle carrier or assembly such as a syringe or cannula. Alternatively, it can be made as an integral part of such an assembly.
  • the shield 2 of the guard is joined to or integrally formed with one end of the hub 1 so that in use, as shown in Figs. 4 to 7, a needle 4 lies adjacent to it and parallel to its longitudinal axis.
  • the shield 2 is longer than the needle 4 and the lip 3 projects outwardly of the shield 2, transversely with respect to the needle 4, so as to cover the needle tip 5.
  • the gap between the needle tip 5 and the adjacent surface 6 of the lip 3 is small but can be made sufficient to accommodate a needle 4 with a conventional protective sheath (not shown) covering its tip 5.
  • the lip 3 comprises an extension to the shield 2 which projects outwardly substantially in-line with the shield 2 beyond the tip 5 of the needle 4 when the needle is not is use.
  • the projecting edge 7 of the lip 3 is preferably formed with a rounded surface as it will rest and rub against the skin of a patient during use of the needle 4.
  • this is accomplished by the provision of an enlarged rounded edge 7.
  • the lip 3 can be formed by a U-shaped bend" in the end portion of the shield 2 as shown in the modified guard of Figs. 4 to 6. Both of these arrangements have the advantage that the lip 3 is thereby made sufficiently resilient to absorb the impact of the needle 4 if the needle assembly is dropped on its end.
  • the lip 3 can be formed by a solid block, which can be made of material permitting penetration by the tip 5 if the assembly is dropped.
  • the central portion of the shield 1 defines an aperture 8 through which the stem of the needle 4 and its tip 5 can be seen.
  • a web 9 at each side of the shield 1 projecting between the lip 3 and a central portion of the shield 2 is a web 9.
  • the webs 9 assist in retention of the tip 5 of the needle 4 so that it remains covered by the lip 3 when not in use, particularly if it is dropped or mis-handled.
  • webs 9A can extend along the full length of the shield, as shown in dashed lines in Fig. 1.
  • the side of the shield 2 opposite that which lies adjacent the needle 4 can be marked by the provision of a groove or painted-on line to indicate the normal position of the needle 4 when in its unlocked position along the longitudinal axis of the shield 2. This helps in siting the tip 5 of the needle 4 prior to entry of the needle 4 into the body of a patient.
  • the shield 2 Adjacent the lip 3, the shield 2 is provided with a locking arrangement 10 against which the stem of the needle 4 adjacent the tip 5 can rest when not in use.
  • the locking arrangement 10 comprises a means by which the needle 4 can be securely fastened to the shield 2 after use so that the tip 5 thereafter remains covered to prevent subsequent needle-stick injury.
  • the locking arrangement 10 is located adjacent the tip 5 of the needle 4 at the lip end of the shield 2. It comprises a block 11 defining a centrally located receptacle 12 which is accessible via a narrow aperture or keyhole 13.
  • the keyhole 13 is partly covered by a inwardly projecting rim 14.
  • the rim 14 projects transversely over the longitudinal axis of the shield so that the needle 4 can be retained behind it within the receptacle 12, as will be described.
  • the needle 4 lies centrally of the shield 4 adjacent the locking arrangement 10 and the lip 3 covers the tip 5.
  • the needle assembly is positioned so that the shield 2 lies above the needle 4 with the rounded surface 7 of the lip 3 resting on the surface of the patient's skin F.
  • the tip 5 and the intended site of its entry into the patient can be seen through the aperture 8 and the needle assembly can then be employed in the usual way.
  • the shield 2 flexes away from the needle 4 and rides along the skin surface.
  • the shield 2 is resilient, when the needle 4 is withdrawn, it resiles back towards the needle 4 until finally, as the tip 5 is withdrawn, the lip 3 springs back to cover it.
  • the used needle 4 can now be locked to the shield 1, as shown in Fig. 7, by turning the needle assembly and guard over through 180" and resting the end of the shield 2 on a hard surface. Manual pressure adjacent the hub 1 will now force the needle 4 through the keyhole 13 into the receptacle 12 past the rim 14. As the rim 14 overlies the normal position of the needle parallel to the longitudinal axis of the shield, when pressure on the assembly is released, the needle 4 remains trapped in a non-return position in the receptacle 12 behind the rim 14. In this position, the shield 2 cannot be accidentally bent away from the needle 4 to expose the tip 5. However, even in an unlocked state, if the assembly is accidentally dropped, the shield 2 will remain adjacent the needle with the lip 3 covering the tip 5 to prevent needle-stick injuries .
  • the shape of the rim 14 facilitates the locking operation.
  • the rim 14 is inwardly curved to assist sliding entry of the needle 4 around it and into the receptacle 12.
  • a groove 15 in line with the longitudinal axis of the needle 4 in which the needle 4 will therefore tend to locate thus preventing it from springing back out of the receptacle 12.
  • the locking arrangement 10 comprises an elongate receptacle 12A accessible via an offset keyhole aperture 13A.
  • the offset keyhole 13A helps to prevent the needle 4 from accidentally being locked to the shield 2 prior to use as the needle 4 has to be moved slightly to one side of the longitudinal axis of the shield 2 to enter it.
  • the locking arrangement comprises a receptacle comprising a groove accessible via a keyhole, the sides of which are resilient and define a V-shape .
  • the narrowest width of the keyhole is commensurate with the diameter of the needle so that a slight force is required to force the needle through the keyhole. The needle is thereby prevented from springing back out of the groove.
  • the keyhole can be covered by a flap which is only movable inwardly of the receptacle so that the needle can pass through the keyhole past the flap but once in the receptacle cannot pass back though the keyhole.
  • the shield 2 flexes away from the needle 4 during use to permit cannulation and resiles back into position thereafter.
  • the shield- is attached to the hub in such away as to permit it to move and resile back into position
  • it could be made of a rigid material.
  • the shield could be hinged to the hub by any suitable hinge arrangement which is biased so as to ensure the shield resiles back to a position adjacent the needle after being moved away therefrom.
  • a conventional spring-loaded hinge could be used or alternatively the shield could be attached to the hub by a strip of resilient material which will flex.
  • the needle guard of the invention can be manufactured for fitment to a conventional needle assemblies or as an integral part of them. Three such arrangements are shown in Figs. 8 to 10 and each of these will now be described.
  • Fig. 8 shows a needle guard 16 attached to the hub of a needle 17 of a conventional Sarstedt system wherein the hub 1 is clipped over a complementarily shaped end portion 18 of the needle hub 17.
  • the needle 4, which is attached to the end portion 18 passes through a central aperture formed in the hub 1 to lie adjacent the shield 2.
  • the hub defines an internally tapering sleeve 19 which is pushed over a corresponding tapering hub 20 of a needle.
  • the cap 20 carries the needle 4, which projects out of the end of the sleeve 19 to again lie adjacent to the shield 2.
  • a vacutainer system is depicted wherein a needle guard 21 is attached to an evacuated blood collection system holder.
  • the means of attachment allows the guard 21 to be rotated on attachment of the needle 4 so that the guard may be positioned correctly for cannulation.
  • the guard according to the invention is suitable for use with all needle and cannula assemblies and is not dependent on the size of needle or its function, being suitable for vena puncture, subcutaneous and subcuticular injections as well as cannulation. For example it can be used as part of a butterfly needle set.
  • the size, weight and flexibility of the guard can be adapted as required without compromising its effectiveness or significantly affecting its cost.
  • the guard is compact, is inexpensive to produce and requires no assembly other than fitment to a needle carrier or needle assembly if not integrally formed therewith. If made in one-piece from a suitable flexible and resilient material it also has the benefit of comprising no moving parts.

Landscapes

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

Abstract

Une protection destinée à une aiguille médicale se fixe sur une seringue ou canule afin de prévenir toute piqûre accidentelle. Elle comporte un manchon (1) et un élément protecteur (2) venant se placer parallèlement à l'aiguille (4) du dispositif. L'élément protecteur (2) peut s'éloigner, de préférence par flexion, de l'aiguille (4) lorsque celle-ci pénètre dans le corps (F) d'un patient et il se rapproche de ladite aiguille lors du retrait de celle-ci. L'élément protecteur (2) est muni d'une lèvre (3) prenant la forme d'un rebord qui masque l'extrémité (5) de l'aiguille (4) lorsque l'on n'utilise pas cette dernière. Ce bouclier (2) est doté de préférence d'un dispositif de verrouillage (10, 11) qui peut le verrouiller sur l'aiguille (4) après utilisation de cette dernière.
PCT/GB1993/000543 1992-03-26 1993-03-16 Protection pour aiguille medicale WO1993018809A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9206656.2 1992-03-26
GB929206656A GB9206656D0 (en) 1992-03-26 1992-03-26 A needle guard

Publications (1)

Publication Number Publication Date
WO1993018809A1 true WO1993018809A1 (fr) 1993-09-30

Family

ID=10712925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000543 WO1993018809A1 (fr) 1992-03-26 1993-03-16 Protection pour aiguille medicale

Country Status (3)

Country Link
AU (1) AU3759293A (fr)
GB (1) GB9206656D0 (fr)
WO (1) WO1993018809A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996009083A1 (fr) * 1994-09-24 1996-03-28 William Frost Robertson Protecteur pour aiguille
DE20102760U1 (de) 2001-02-16 2001-05-03 B. Braun Melsungen Ag, 34212 Melsungen Schutzvorrichtung für eine Injektionsnadel mit gebogener Spitze
US20090038135A1 (en) * 2005-04-18 2009-02-12 Snow Jeremy W Methods of manufacturing safety shields for medical needles and related manufacturing devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658061A (en) * 1970-11-10 1972-04-25 Baxter Laboratories Inc Needle guard
GB2202446A (en) * 1987-02-27 1988-09-28 Dr Ian Duncan Conacher Needle guard
EP0343438A1 (fr) * 1988-05-23 1989-11-29 Becton, Dickinson and Company Bouclier d'aiguille
DE9007012U1 (de) * 1990-06-23 1990-08-30 Lienhart, Ekbert, 2224 Burg Kanüle
WO1991018635A1 (fr) * 1990-05-31 1991-12-12 Syntuition Incorporated Protection de securite pour aiguilles, instruments coupants et outils

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658061A (en) * 1970-11-10 1972-04-25 Baxter Laboratories Inc Needle guard
GB2202446A (en) * 1987-02-27 1988-09-28 Dr Ian Duncan Conacher Needle guard
EP0343438A1 (fr) * 1988-05-23 1989-11-29 Becton, Dickinson and Company Bouclier d'aiguille
WO1991018635A1 (fr) * 1990-05-31 1991-12-12 Syntuition Incorporated Protection de securite pour aiguilles, instruments coupants et outils
DE9007012U1 (de) * 1990-06-23 1990-08-30 Lienhart, Ekbert, 2224 Burg Kanüle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996009083A1 (fr) * 1994-09-24 1996-03-28 William Frost Robertson Protecteur pour aiguille
US5836920A (en) * 1994-09-24 1998-11-17 Robertson; William Frost Needle guard
DE20102760U1 (de) 2001-02-16 2001-05-03 B. Braun Melsungen Ag, 34212 Melsungen Schutzvorrichtung für eine Injektionsnadel mit gebogener Spitze
US20090038135A1 (en) * 2005-04-18 2009-02-12 Snow Jeremy W Methods of manufacturing safety shields for medical needles and related manufacturing devices
US8844112B2 (en) * 2005-04-18 2014-09-30 Specialized Health Products, Inc. Methods of manufacturing safety shields for medical needles and related manufacturing devices

Also Published As

Publication number Publication date
AU3759293A (en) 1993-10-21
GB9206656D0 (en) 1992-05-06

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