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WO1993000950A1 - Seringue jetable a securite - Google Patents

Seringue jetable a securite Download PDF

Info

Publication number
WO1993000950A1
WO1993000950A1 PCT/IT1992/000072 IT9200072W WO9300950A1 WO 1993000950 A1 WO1993000950 A1 WO 1993000950A1 IT 9200072 W IT9200072 W IT 9200072W WO 9300950 A1 WO9300950 A1 WO 9300950A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
syringe
fact
cavity
needle
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.)
Ceased
Application number
PCT/IT1992/000072
Other languages
English (en)
Inventor
Mauro Ghigo
Marco Ghigo
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1993000950A1 publication Critical patent/WO1993000950A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • 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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • 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
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3235—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
    • 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
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3241—Needle retraction energy is accumulated inside of a hollow plunger rod

Definitions

  • the present invention relates to a disposable safety syringe for diagnostic or therapeutic purposes.
  • Disposable safety syringes have therefore been devised, as described for example in Italian Patent Application n. 67266-A/88 filed on 25 March 1988 by the present Applicants, whereby the plunger, close to the bottom limit position, activates a mechanism for axially releasing the needle, which, loaded by elastic means, is withdrawn inside the body of the syringe.
  • a disposable safety syringe comprising: a tubular body defining a first cavity for therapeutic or physiological fluid; a hollow needle fitted to said body at least in the operating position of said syringe, and communicating with said first cavity at least in said position; - a plunger sliding inside said first cavity, for aspirating or expelling said fluid through said needle; characterized by the fact that it comprises first constraint means between said plunger and said body, said means being active at least along an end portion of the compression stroke of said plunger, for preventing said plunger from sliding in the fluid intake direction.
  • Fig.l shows an axial section of a syringe in accordance with the present invention
  • Fig.2 shows a section along line II-II in Fig.l
  • Fig.s 3 and 4 show sections along line III-III in Fig.l of the syringe in two different operating positions;
  • Fig.5 shows an enlarged, partially sectioned side view of a portion of the Fig.l syringe;
  • Fig.s 6 and 7 show sections along line VI-VI in
  • Fig.5 of the syringe in two different operating positions Fig.8 shows an enlarged axial section of the syringe, as in Fig.l, in a different operating position;
  • Fig.9 shows a longitudinal section of the syringe in a second operating position.
  • BEST MODE FOR CARRYING OUT THE INVENTION With reference to Fig.s 1 and 8, number 1 indicates a syringe substantially comprising a main body 2 consisting of an intermediate annular flange 3 from the opposite ends of which there extend axially a truncated-cone-shaped head 4 and an elongated tubular portion 5.
  • Tubular portion 5 presents a circumferential groove 6 adjacent to flange 3; and, at groove 6, a radial through opening 7 of roughly 90°.
  • the portion of tubular portion 5 adjacent to flange 3 thus presents a substantially C-shaped section, as shown clearly in Fig.s 3 and 4.
  • tubular portion 5 The free end 8 of tubular portion 5 is closed by a plug 9 fitted, e.g. welded, inside portion 5.
  • Main body 2 defines an inner cavity 10 having a first portion 11 extending partly inside head 4 and partly inside tubular portion 5; and a second portion 12 extending along the remaining portion of tubular portion 5, having a larger inside diameter than first portion 11, and defined in relation to portion 11 by an inner shoulder 13 of tubular portion 5.
  • Cavity 10 communicates externally via an axial hole 14 through head 4.
  • flange 3 which conveniently presents a locating recess 21, is fitted (e.g. welded) with a tubular barrel 22 extending coaxially with tubular portion 5 with which it defines an annular chamber 23, and terminating in an outer flange 31 as on normal syringes.
  • Main body 2 and barrel 22 combine to define body 32 of syringe 1.
  • Main body 2 houses an axially-sliding piston 15 comprising a rod 16 with an axial hole 17 at the end fitted integral with a normal hollow needle 18; and a cylindrical head 19 at the opposite end.
  • Piston 15 is fitted inside the bottom of cavity 10 so that needle 18 projects through hole 14, rod 16 cooperates axially with bottom wall 20 of cavity 10, and head 19 is housed inside portion 12 of cavity 10.
  • rod 16 presents a longitudinal groove 24 (Fig.2) cooperating with a longitudinal projection 25 formed on head 4 inside portion 11 of cavity 10, for angularly arresting piston 15 in relation to main body 2.
  • Rod 16 also presents two small, axially-spaced, annular projections 26 cooperating in airtight manner with the inner wall of portion 11 of cavity 10 in main body 2.
  • a radial opening 27 formed on rod 16 between projections 26 connects axial hole 17 and consequently the inner cavity of needle 18 to a radial through opening 28 formed in tubular portion 5 adjacent to opening 27.
  • Piston 15 is normally maintained in the above position by a retaining ring 29 having a radial opening 30, and two triangular inner teeth 34 on either side of opening 30.
  • Ring 29 presents a flat face 35 cooperating in use with flange 3; and an opposite face 36 having a peripheral annular projection 37 defined internally by a flared conical annular surface 38.
  • Ring 29 is fitted inside groove 6 of main body 2 so that teeth 34 fit inside body 2 through opening 7 and engage a tangential groove 39 on rod 16.
  • syringe 1 comprises a tubular plunger 44 sliding inside chamber 23, having a conical front surface 45, and fitted on the opposite end with a pressure disk 46. Close to pressure disk 46, plunger 44 presents two diametrically-opposed inner projections 47 having respective shallow axial ledges 48, and terminating rearwards in respective flexible, substantially triangular teeth 49 facing inwards of plunger 44 and towards pressure disk 46.
  • the free end 8 of tubular portion 5 of main body 2 presents two longitudinal grooves 50 engaged by projections 47 under particular operating conditions described in detail later on.
  • Grooves 50 present a toothed bottom surface 51 defined by a number of serrated projections 52 sloping slightly on the side facing the end of portion 5, and much more sharply on the opposite side, so as to define with teeth 49 a ratchet device permitting one-way motion of plunger 44 inwards of chamber 23.
  • Plunger 44 presents two shallow, rounded, outer longitudinal grooves 55, 56 selectively engaged by a longitudinal inner rib 57 on barrel 22, for achieving two different angular positions of plunger 44 in relation to barrel 22 and, therefore, to integral main body 2 (Fig.s 6 and 7). Passage from one angular position to the other is made possible by virtue of the elasticity of the materials employed. In a first of said positions (Fig.7), projections
  • plunger 44 are angularly offset in relation to grooves 50, so that ledges 48 of projections 47 cooperate axially with end surface 58 of tubular portion 5.
  • Syringe 1 operates as follows.
  • Syringe 1 is assembled and sold with plunger 44 in the angular position shown in Fig.7, wherein it presents a minimum axial length by virtue of projections 47 contacting end surface 58 of tubular portion 5 of main body 2, and wherein fluid may be aspirated by withdrawing plunger 44 in the usual manner.
  • the aspirated fluid flows through needle 18, opening 27 in piston 15, and opening 28 in tubular portion 5 into annular chamber 23.
  • plunger 44 For injecting and expelling all the aspirated fluid, plunger 44 must be set to the angular position shown in Fig.6, wherein projections 47 are aligned with respective grooves 50. For the first part of the compression stroke of plunger 44, operation is as described above, and plunger 44 may still be inverted.
  • the fluid is forced from chamber 23 into needle 18 through openings 28 and 27.
  • the above constraint thus provides for preventing syringe 1 from being reused, by virtue of preventing plunger 44 from being withdrawn for aspirating further fluid.
  • Fig.8 shows the position prior to engagement, wherein ring 29 is parted by plunger 44; and Fig.9 the engaged position, wherein spring 40 maintains piston 15 and connected needle 18 housed entirely inside tubular portion 5 of main body 2.
  • syringe 1 provides for one-way travel of plunger 44 over the final part of the compression stroke, thus preventing the syringe from being reused by virtue of preventing further fluid from being aspirated.
  • the needle is withdrawn entirely inside the body of the syringe, thus enabling safe handling of the syringe, particularly by refuse workers, and preventing inadvertent contact with potentially infected needles discarded on public premises.
  • any number of changes may be made to the one-way constraint of plunger 44, or to the device for arresting piston 15.

Landscapes

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

Abstract

Seringue jetable à sécurité comportant un corps tubulaire (32) délimitant une cavité (23) apte à recevoir un fluide thérapeutique ou physiologique; une aiguille creuse (18) fixée à un élément porteur (15) monté amovible sur le corps (32), et chargée par un ressort (40) à l'intérieur du corps (32); un piston (44) monté coulissant à l'intérieur de la cavité (23) et conçu de telle sorte que, à la fin de sa course, il libère l'élément porteur (15) du corps (32); ainsi qu'un élément de serrage (49, 51) monté entre le piston (44) et le corps (32) et actionné vers la fin de la course de compression du piston (44) de manière à empêcher tout mouvement du piston (44) dans le sens de l'aspiration de fluide.
PCT/IT1992/000072 1991-07-05 1992-07-02 Seringue jetable a securite Ceased WO1993000950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO91A000526 1991-07-05
ITTO910526A IT1249952B (it) 1991-07-05 1991-07-05 Siringa monouso di sicurezza

Publications (1)

Publication Number Publication Date
WO1993000950A1 true WO1993000950A1 (fr) 1993-01-21

Family

ID=11409471

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1992/000072 Ceased WO1993000950A1 (fr) 1991-07-05 1992-07-02 Seringue jetable a securite

Country Status (4)

Country Link
CN (1) CN1070345A (fr)
AU (1) AU2369792A (fr)
IT (1) IT1249952B (fr)
WO (1) WO1993000950A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996006649A1 (fr) * 1994-09-01 1996-03-07 Abdelghani Hachemi Aiguille de seringue et de perfusion retro-ejectable
EP0652020A3 (fr) * 1993-08-23 1996-05-29 Sakharam Dhundiraj Mahurkar Ensemble aiguille hypodermique rétractable.
EP1849494A1 (fr) * 2006-04-28 2007-10-31 Medikit Co., Ltd. Ensemble d'aiguille à demeure avec aiguille rétractable et chambre de retour
US7481797B2 (en) 2001-11-28 2009-01-27 Mahurkar Sakharam D Retractable needle single use safety syringe
US20220134021A1 (en) * 2018-11-13 2022-05-05 Credence Medsystems, Inc. System and method for multiple site injection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840291B2 (en) * 1999-10-15 2005-01-11 Becton Dickinson And Company Attachment for a medical device
PT1868669T (pt) * 2005-04-15 2017-01-17 Unitract Syringe Pty Ltd Seringa de retração controlada e seu êmbolo

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203047A (en) * 1987-02-27 1988-10-12 Gilbert Henry Banks Single-use syringe
US4838869A (en) * 1987-08-29 1989-06-13 Allard Edward F Retractable needle syringe
WO1990007350A1 (fr) * 1989-01-04 1990-07-12 Mueller Odd Gerhard Seringue hypodermique jetable
WO1990007948A1 (fr) * 1989-01-19 1990-07-26 Jaime Caralt Batlle Seringue hypodermique jetable
US5017187A (en) * 1990-05-04 1991-05-21 Sullivan Robert J Self retracting hypodermic syringe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203047A (en) * 1987-02-27 1988-10-12 Gilbert Henry Banks Single-use syringe
US4838869A (en) * 1987-08-29 1989-06-13 Allard Edward F Retractable needle syringe
WO1990007350A1 (fr) * 1989-01-04 1990-07-12 Mueller Odd Gerhard Seringue hypodermique jetable
WO1990007948A1 (fr) * 1989-01-19 1990-07-26 Jaime Caralt Batlle Seringue hypodermique jetable
US5017187A (en) * 1990-05-04 1991-05-21 Sullivan Robert J Self retracting hypodermic syringe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652020A3 (fr) * 1993-08-23 1996-05-29 Sakharam Dhundiraj Mahurkar Ensemble aiguille hypodermique rétractable.
WO1996006649A1 (fr) * 1994-09-01 1996-03-07 Abdelghani Hachemi Aiguille de seringue et de perfusion retro-ejectable
FR2724114A1 (fr) * 1994-09-01 1996-03-08 Hachemi Abdelghani Aiguille de seringue retro-ejectable
US7481797B2 (en) 2001-11-28 2009-01-27 Mahurkar Sakharam D Retractable needle single use safety syringe
EP1849494A1 (fr) * 2006-04-28 2007-10-31 Medikit Co., Ltd. Ensemble d'aiguille à demeure avec aiguille rétractable et chambre de retour
US8226612B2 (en) 2006-04-28 2012-07-24 Medikit Co., Ltd. Indwelling needle assembly
US20220134021A1 (en) * 2018-11-13 2022-05-05 Credence Medsystems, Inc. System and method for multiple site injection
US12329953B2 (en) * 2018-11-13 2025-06-17 Credence Medsystems, Inc. System and method for multiple site injection

Also Published As

Publication number Publication date
AU2369792A (en) 1993-02-11
CN1070345A (zh) 1993-03-31
IT1249952B (it) 1995-03-30
ITTO910526A1 (it) 1993-01-05
ITTO910526A0 (it) 1991-07-05

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