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WO2001064272A1 - Seringue non reutilisable retractable - Google Patents

Seringue non reutilisable retractable Download PDF

Info

Publication number
WO2001064272A1
WO2001064272A1 PCT/IB2001/000241 IB0100241W WO0164272A1 WO 2001064272 A1 WO2001064272 A1 WO 2001064272A1 IB 0100241 W IB0100241 W IB 0100241W WO 0164272 A1 WO0164272 A1 WO 0164272A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
needle
carrier
plunger
intruder
Prior art date
Application number
PCT/IB2001/000241
Other languages
English (en)
Inventor
Jun Piao Teng
Original Assignee
Jun Piao Teng
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 Jun Piao Teng filed Critical Jun Piao Teng
Priority to AU32176/01A priority Critical patent/AU3217601A/en
Publication of WO2001064272A1 publication Critical patent/WO2001064272A1/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
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • 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
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle
    • A61M2005/3224—Means to disalign the needle tip and syringe nozzle

Definitions

  • the present invention relates in general to a retractable non-reusable syringe.
  • AIDS acquired immune deficiency sydrome
  • a drug-user usually reuses a spent syringe which then practically is circulated among the group of drug- users for convenient purpose or other reasons.
  • an absolute non-reusable syringe is therefore, important to stop them from using a spent syringe.
  • health-care workers always be in touch with several spent needles daily after injections into the patients, an retractable syringe after injection therefore is also important to protect them from being sticken by the spent needles accidentally.
  • USA-5344403 dated September 6, 1994 by Rahnfong Lee discloses a retractable safety syringe which has a hub at the end of Its plunger which engages a needle carrier when the plunger is depressed so that the needle carrier can be withdrawn into the syringe along with the needle.
  • the plunger has a V-shaped notch located near the hub which can be broken off at any angle, thereby trapping the spent needle within the syringe for preventing it fallen off to injure people.
  • the broken V-shaped notch in practical can be glued to recover for reusable.
  • UK-A-2246297 (1992) discloses a non-reusable syringe with an mterlockmg means.
  • the interlocking means comprises first members in the form of a plurality of pawls engagable with a second member in the form of an undercut recess provided on the barrel and the piston, respectively, of the syringe. This arrangement complicates the construction of the interlocking means and increases the cost of manufacturing.
  • the broken structure of the intruder is inserted tightly and deeply into the hollow centre of the needle carrier until reaching at the needle such that the needle is stuck and close the air duct at the entrance, so that the syringe will generally not function properly.
  • a piston adjacent the shaft surrounded with a rubber material which protrudes a pipe- shaped intruder at an angle from the centre therein, wherein the needle carrier can be manually retracted with the plunger into the hollow body by inserting tightly the intruder into the hollow centre of the needle carrier when the injection is completed, whereby preventing the spent needle to injure people accidentally.
  • the intruder Upon furtheriy withdrawing the needle carrier into the hollow body, the intruder will be elastically returned to original inclination to locate the needle end touching tightly against the inner wall of hollow body, so that the needle will be destroyed, when the reuser attempts to reuse by pusnmg the plunger forward until pressing the needle at the lateral notch for purpose of releasing the needle carrier from the intruder through the protruding conduit. Furthermore, there are a couple of fragile portions, which are adjacent the piston of the plunger shaft.
  • the fragile portions are easy to be broken off when the reuser is for reuse purpose, attempting to withdraw the plunger until the piston is stopped against the projecting flange which is disposed internally nearby the upper end of the hollow body, and important is that it should do so, so that the spent syringe cannot be reused. Even though an attempt may be made to glue the broken plunger shaft together again, the rejoined structure is so weak that it will generally be broken again upon repeated withdrawal of the plunger.
  • a retractable non-reusable syringe comprising: a hollow body lying a projecting perimet ⁇ c flange at one end and a protruding conduit at other end, a plunger associated with the hollow body for reciprocal movement therein, a needle carrier is mounted within the protruding conduit, the plunger comprising a piston connected to one end of a shaft, wherein the piston includes the inclined intruding means for engaging the plunger to the needle carrier upon fully depressing the plunger whereby causing the needle carrier to enter the hollow body upon retraction of the plunger, characterized in that the shaft of the plunger includes a fragile portion adjacent the piston allowing the shaft to break upon a reuser trying to withdraw the shaft violently after retraction of the needle, wherein the intruding means allows the needle touching against the inner wall of the body upon the carrier is released from the
  • the intruding means comprises an elastical pipe- shaped portion inclined at an angle protruding from the centre of the rubber material and the intruder's perimetric surface includes a plurality of projecting rows and a plurality of Air notch, is devided by a V-shaped annular fragile notch at the midway into two parts with a sharp end pointing ahead.
  • the fragile portion between the plunger and the shaft comprises four weak connected wings of the shaft with an isolated gap in central position.
  • Figure 1 shows a perspective view of the dismantled parts of the syringe.
  • Figure 2A shows an enlargement of the needle carrier fixing into the internal wall of the producting conduit upon assembling.
  • Figure 2B shows an enlargement of the elastic intruder with an inclination ahead before assembling with the piston.
  • Figure 2C shows an enlargement of the fragile portion when it is under normal circumstance before assembling.
  • Figure 2D shows an enlargement of the projecting perimetric flange nearby the opening of the hollow body before assembling.
  • Figure 3 shows a cross-sectional view of the assembled syringe .
  • Figure 4A shows a cross-sectional view focusing the assembled syringe on the intruding section indicating when the plunger is being initially depressed, the intruder's end part with sharp tip is inserted into the hollow centre of carrier.
  • Figure 4B shows a cross-sectional view focusing the assembled syringe on the intruding section indicating when the plunger is being continuously depressed, the intruder's front part is being declined inserting into the hollow centre of carrier.
  • Figure 4C shows a cross-sectional view focusing the assembled syringe on the intruding section indicating when the plunger is fully depressed, the intruder is declined inserting completely into the hollow centre of carrier.
  • Figure 5A shows a cross-sectional view of the assembled syringe focusing when the carrier is released from the mounting of protruding conduit upon the plunger is being withdrawn, wherein the intruder is returned to original inclination causing the needle sliding along the internal wall of the protruding conduit .
  • Figure 5B shows a cross-sectional view of the assembled syringe indicating when the needle carrier is fully retracted, wherein the intruder's original inclination causes the needle end sliding along the internal wall of the hollow body.
  • Figure 6A shows a cross-sectional view of the assembled syringe indicating when the plunger is being pushed, wherein the intruder's original inclination causes the needle sliding along the internal wall towards the lateral notch at the protruding conduit .
  • Figure 6B shows a cross-sectional view of the assembled syringe indicating when the plunger is being furtherly pushed, wherein the intruder's original inclination causes the needle sliding along the internal wall until stopping at the lateral notch of the protruding conduit, whereby curving the needle to destroy.
  • Figure 6C shows a cross-sectional view of the assembled syringe indicating when the plunger is being withdrawn, wherein the intruder's original inclination causes the destroyed needle sliding along the internal wail of the hollow body.
  • Figure 7A shows a cross-sectional view of the assembled syringe indicating when the plunger is completely withdrawn, wherein the piston stopping at the projecting perimetric flange of the hollow body.
  • Figure 7B shows a cross-sectional view of the assembled syringe indicating when the plunger is furtherly withdrawn violently, wherein the plunger will be broken at the fragile portion adjacent to the piston which when being stopped by the projecting perimetric flange of the hollow body.
  • Figure 8 shows a cross-sectional view of the assembled syringe indicating that even when the first user neglects to retract the needle into the barrel after injection, then when the reuser attempts to release the inserted intruder from the needle carrier by holding the needle carrier and withdrawing the plunger violently from other end, respectively, the end part of intruder being broken off at its annular fragile notch sticking at the needle entrance of the carrier.
  • Figure 1 shows the respective parts of the syringe which comprises a hollow body (10) , a plunger (20) , and a needle carrier (40) .
  • Body (10) has a first flange (11) at the upper end, which adjacent a projecting perimetric flange (12) of about 0.5 mm. above the inner wall of body (10) as shown in Fig. 2D, and a protruding conduit of about an internal distance of 4 mm. (14, 15) at the lower end.
  • Protruding conduit (14, 15) is designed such that its internal diameters are declined approximate from 5.625 mm. (14) towards the end of 5.57 mm.
  • Plunger (20) consists of a third flange (21) at the upper end, a cross-shaped flanged shaft (22) in the middle which is declining in sizes towards the upper end, a piston (201) surrounded with a rubber material (30), a fragile portion (24) with a gap (241) which is adjacent piston (201), a fourth flange (25) which perimetric rims are declined in diameters from front rim (25A) towards back rim (25B) , integrally connected to a supporting flange (251), a fifth flange (26) terminating with a strengthen flange (261), wherein the diameter of Front rim (25A) is designed the same as internal diameter of body (10), which is good enough to be stopped by projecting perimetric flange (12) when plunger (20) is withdrawn backward, and the diameter of back rim (25B) is designed about 1 mm. smaller than internal diameter of body (10), which is ust good enough to let piston (201) be pushed across projecting perimetric flange (12)
  • Rubber material (30) integrally protrudes forward an elastic pipe-shaped intruder (31) with an inclination of about 7 degrees.
  • Intruder (31) is devided by a V-shaped annular fragile notch (31C) to form a front part (31A) and an end part (31B) of intruder terminating with a sharp tip (33), which diameters are the same as internal diameters of hollow centre (42) of carrier (40) declined m sizes along from tront part (31A) towards end part (31B) within a same distance of about 11 mm.
  • Frgile notch (31C) is a sharp notch cutting at the midway of intruder (31) with about 1 mm m width along the external surface leaving the uncut diameter about 1.0 mm which is easy to break.
  • Both parts of intruder's (31A, 31B) ) perimetric surface are casted with a plurality of projecting rows (32) about 0.25 mm. above, and also undercut with a plurality of air notches (31D) about 0.5 mm m widtn and 0.5 mm m depth of each for releasing pressure upon insertion as shown m Fig. 2B.
  • Rubber material's (30; chemical composition of the raw material used is the same as the existing single-use syringe sold m the market with the same physical and chemical characteristics .
  • Needle carrier (40) used in the present invention is commonly found in the market, which integrally comprises an oval shaped carrier flange (41;, a hollow carrier (42) and a holding means (43' 1 to hold a needle (44) as shown m Fig. 2A.
  • the assembled syringe with plunger (20) m its initial depression stage when injection is carried out as shown m
  • F ⁇ jr D ⁇ shows upc r in ⁇ ection, when plun ⁇ er (20) _.s being depressed till sharp tip (33) reaching at hollow centre (42) of carrier (40), intruder (31) is still remained m original inclination status, so that sharp tip (33) leads end part (31B) of intruder (31) be inserted into hollow centre (42) of carrier (40).
  • Upon further depression due to undercut inclination of fragile notch (31C) as well as its elastic characteristic, so that most part of intruder (31) is horizontally depressed into hollow centre (42) of carrier (40) as shown m Fig. 4B.
  • plunger (20) is depressed to the end of body (10) completely, whole part of intruder (31) is simultaneous horizontally depressed into hollow centre (42) of carrier (40) as shown m Fig. 4C.
  • Figure 5A shows upon withdrawal of plunger (20), due to projecting rows (32) on the perimetric surface of intruder (31) are pressed tightly against the inner wall of hollow centre (42) of carrier (40), wherein it generates the friction force, so that carrier (40) is tightly retracted and released from the mounting of protruding conduit (14). Simultaneously after the release, intruder's (31) elastic characteristic causes itself returned back to its original inclination status, whereby inclining needle (44) along the inner wall of protruding conduit (14, 15). Upon further withdrawal of plunger (20) in same previous manners as shown in Fig. 5B, needle end (44A) is inclined touching toughly against the inner wall of body (10).
  • Second alternative way to reuse the syringe is by withdrawing plunger (20) violently backward, for purpose of hopefully taking out piston (201) from body (10), so as to release needle carrier (40) from intruder (31) and mounting needle carrier (40) back at original position within protruding conduit (14 to 15) for reuse as shown m Figure 7A. But unfortunately again, due to front rim (25A) of fourth flange

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 seringue non réutilisable rétractable comprend un corps creux (10) doté d'un bord de projection interne (12) à une extrémité, et d'une encoche latérale interne (13) adjacente à un conduit en saillie (14, 15) à l'autre extrémité, un support d'aiguille (40) étant monté à l'intérieur dudit conduit (14, 15). Ladite seringue comporte également un poussoir (20) pourvu d'un piston (201) entouré d'une matière en caoutchouc (30) se terminant par un élément d'intrusion incliné (31) relié à une extrémité d'une tige (22), ladite tige (22) pouvant fonctionner manuellement pour introduire l'élément d'intrusion (31) dans le centre creux (42) du support (40). Ceci aboutit sur un dispositif d'intrusion (31, 42) permettant d'engager le poussoir (20) avec le support (40) suite à une dépression complète du poussoir (20), ce qui provoque, d'une part, une rétraction du support (40) de manière excentrée à l'intérieur du corps (10) et, d'autre part, la rupture de l'aiguille (44) au niveau de l'encoche latérale (13), au cas où un utilisateur essayait d'enlever l'aiguille (44) par le conduit en saillie (14, 15). Le poussoir (20) comprend une portion fragile (24) adjacente au piston (201) pour permettre à l'enveloppe (22) de se rompre au niveau du bord de projection (12), au cas où un utilisateur essayait d'enlever le piston (201) du corps (10).
PCT/IB2001/000241 2000-02-28 2001-02-23 Seringue non reutilisable retractable WO2001064272A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32176/01A AU3217601A (en) 2000-02-28 2001-02-23 Retractable non-reusable syringe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG200000804 2000-02-28
SG200000804-5 2000-02-28

Publications (1)

Publication Number Publication Date
WO2001064272A1 true WO2001064272A1 (fr) 2001-09-07

Family

ID=20430528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/000241 WO2001064272A1 (fr) 2000-02-28 2001-02-23 Seringue non reutilisable retractable

Country Status (2)

Country Link
AU (1) AU3217601A (fr)
WO (1) WO2001064272A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004033007A1 (fr) * 2002-10-08 2004-04-22 Jun Piao Teng Seringue non reutilisable, retractable, pour usages medicaux multiples
US8225787B2 (en) 2007-08-31 2012-07-24 Wet Nose Technologies, Llc Adjustable pressure device and system thereof
US8235042B2 (en) 2007-08-31 2012-08-07 Wet Nose Technologies, Llc Exhalatory pressure device and system thereof
US8783247B2 (en) 2009-02-04 2014-07-22 Wet Nose Technologies, Llc. Pressure release systems, apparatus and methods
US9205205B2 (en) 2008-11-26 2015-12-08 Becton, Dickinson And Company Single-use auto-disable syringe
US9427504B2 (en) 2007-09-01 2016-08-30 Wet Nose Technologies, Llc Medical apparatus for suction and combination irrigation and suction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047017A (en) * 1987-06-25 1991-09-10 Agven Medical Corporation Limited Syringe
US5171300A (en) * 1988-02-01 1992-12-15 Medtech Group, Inc. Disposable hypodermic syringe
EP0678303A2 (fr) * 1989-09-18 1995-10-25 Robb Pascal Patent Pty. Ltd. Seringue
WO1998006447A2 (fr) * 1996-08-10 1998-02-19 Jun Piao Teng Seringue non reutilisable (mode c)
WO1998058694A1 (fr) * 1997-06-24 1998-12-30 Jun Piao Teng Syringue automatiquement retractable non reutilisable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047017A (en) * 1987-06-25 1991-09-10 Agven Medical Corporation Limited Syringe
US5171300A (en) * 1988-02-01 1992-12-15 Medtech Group, Inc. Disposable hypodermic syringe
EP0678303A2 (fr) * 1989-09-18 1995-10-25 Robb Pascal Patent Pty. Ltd. Seringue
WO1998006447A2 (fr) * 1996-08-10 1998-02-19 Jun Piao Teng Seringue non reutilisable (mode c)
WO1998058694A1 (fr) * 1997-06-24 1998-12-30 Jun Piao Teng Syringue automatiquement retractable non reutilisable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004033007A1 (fr) * 2002-10-08 2004-04-22 Jun Piao Teng Seringue non reutilisable, retractable, pour usages medicaux multiples
US8225787B2 (en) 2007-08-31 2012-07-24 Wet Nose Technologies, Llc Adjustable pressure device and system thereof
US8235042B2 (en) 2007-08-31 2012-08-07 Wet Nose Technologies, Llc Exhalatory pressure device and system thereof
US9427504B2 (en) 2007-09-01 2016-08-30 Wet Nose Technologies, Llc Medical apparatus for suction and combination irrigation and suction
US9205205B2 (en) 2008-11-26 2015-12-08 Becton, Dickinson And Company Single-use auto-disable syringe
US8783247B2 (en) 2009-02-04 2014-07-22 Wet Nose Technologies, Llc. Pressure release systems, apparatus and methods

Also Published As

Publication number Publication date
AU3217601A (en) 2001-09-12

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