EP0809522A1 - Seringue de securite automatique non reutilisable - Google Patents
Seringue de securite automatique non reutilisableInfo
- Publication number
- EP0809522A1 EP0809522A1 EP96904155A EP96904155A EP0809522A1 EP 0809522 A1 EP0809522 A1 EP 0809522A1 EP 96904155 A EP96904155 A EP 96904155A EP 96904155 A EP96904155 A EP 96904155A EP 0809522 A1 EP0809522 A1 EP 0809522A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- piston
- rod
- safety syringe
- syringe according
- 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- Withdrawn
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- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston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
- A61M5/178—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
- A61M2005/3242—Needle retraction by vacuum
Definitions
- the present invention relates to a non-reusable safety syringe, allowing, after normal use of a usual hypodermic needle, the automatic retrogression of the needle, by suction, inside the piston rod, itself inserted in the body syringe.
- hypodermic needles or the equivalent such as cannulas, trocars or catheters, have been used for a long time in hospitals, clinics, laboratories.
- phase of separation of the soiled needle from the syringe body presents a serious risk of accidental injury and contamination of healthcare personnel due to the care given to subjects with communicable or contagious diseases.
- devices have been designed to eliminate all dangers during the handling of the needle, during and after its separation from the syringe and during its storage before destruction.
- the device of the invention responds firstly to a safety objective by making, automatically after use, the needle not accessible and not reusable.
- This device allows secondly the production of syringes of identical use and equivalent manufacturing in terms of cost and technicality compared to existing syringes. Consisting of a needle support part (A), a syringe body (B) and a piston assembly (C) actuated by a hollow tubular rod, the device has the novelty and the advantage of causing the auto-mechanical retrogression of the needle by aspiration inside the hollow tubular rod of the piston.
- the needle being normally fixed on its support, the latter, an independent part of the body of the syringe, has a groove which allows it to be snapped into an orifice, the periphery of which provides support and sealing. After injecting the medical product or transferring the sample for analysis, additional pressure positions the piston at the end of the stroke.
- the shape of the front part of the rod leads to the deformation of the front part of the syringe body, according to various known means, such as a pre-cut or a conical shape, thus making it possible, after widening of the orifice, retrogression of the used needle and its support in the hollow piston rod.
- the syringe having been normally filled according to the habits of the health professions, during the injection of the product, the two parts, syringe body and piston assembly work so that the air remains in the piston rod and that the vacuum is created in the syringe body.
- the sealed stopper positioned at the rear part of the syringe body which allows, during the injection phase, the creation of a vacuum during the forward movement of the piston. It is the opening in the rear part of the plunger rod which, when the displacement thereof forwards positions it inside the syringe body, triggers the suction process. This opening is of shape and surface suitable for the power required by the aspiration of the needle and its support, according to the volumes of the syringes and lengths of the needles used.
- This additional pressure simultaneously has the following effects:. cut and release, thanks to the appropriate shape of the end of the rod, the membrane of the needle support forming a collar at the bottom of the syringe body.
- This collar contributes to the perfect sealing of the device. . tear, by pressing the end of the piston rod, the membrane covering the front face of the piston.
- This membrane allows a uniform pushing action with the piston on the liquid during the injection phase. . to release the needle support part, released after cutting its collar, by pressing the end of the plunger rod on the internal periphery of the end of the syringe body.
- This end being of a conical shape and of a suitable flexibility to allow its deformation. Pre-cutting, for example in a star, can advantageously be envisaged.
- Figure 1 general view of the syringe.
- Figure 2 exploded presentation of the elements: needle holder. syringe body. piston and its hollow tubular rod.
- Figure 1 shows a syringe, according to the invention: The end (1) is pierced with a circular orifice (2) Is anchored in this orifice (2) thanks to the groove (3) the support part (A) whose conical shape (4) of the end allows the normal fixing of a standard needle (5).
- This part (A) is axially pierced (6) in the middle to allow the syringe to be filled, F. ⁇ 5 A
- This part (A) has at its rear part a flange (7) conforming to the shape of the front part ( 1) of the syringe body (B), ensuring the positioning of the part (A) and the sealing of the device.
- This front part (1) is molded so as to have less resistance when the end of the piston rod (8) is pushed at the end of the stroke. Its shape and its possible pre-cutting contribute to the clearance described. at 3
- the front face of the piston is provided, in its center and in the extension of the hollow tubular rod of the piston, with a membrane (10), integral with the front surface of the piston, which allows in suction and injection phases normal operation of the piston (11).
- the piston (11) is fixed on the rod (8) by means of clips (12), of such resistance and positioned so as to make the piston integral with its rod during the filling and injection phases, but allowing advancement of the rod beyond the piston after an additional push at the end of injection.
- the piston rod (8) is actuated by the pusher (13). It moves guided by the tight stopper (14) During the forward movement of the piston (11), a vacuum chamber (15) is formed in the syringe body (B) due to the tightness of the piston (11) and of the plug (14). At the same time the air remains inside (16) of the hollow tubular rod (8).
- the hollow tubular rod (8) is provided in its internal part with a conical shape (18) tightening from front to rear and allowing the locking of the needle and its support after aspiration.
- the hollow tubular rod (8) is provided in its external part with a conical shape (19) flaring from front to rear in order to create a brake effect on the piston rod during the injection phase and improve the tightness of the vacuum chamber (15).
- the present description of the device of the invention applies to all types of syringes and needles, of all common dimensions, the purpose of the invention being to trigger the automatic retrogression by aspiration of the needle inside the hollow tubular rod of the piston; plunger rod, and needle ultimately trapped inside the syringe body. F ⁇ .
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
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9502076 | 1995-02-17 | ||
FR9502076A FR2730639B1 (fr) | 1995-02-17 | 1995-02-17 | Seringue de securite automatique non reutilisable |
PCT/FR1996/000258 WO1996025192A1 (fr) | 1995-02-17 | 1996-02-16 | Seringue de securite automatique non reutilisable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0809522A1 true EP0809522A1 (fr) | 1997-12-03 |
Family
ID=9476420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96904155A Withdrawn EP0809522A1 (fr) | 1995-02-17 | 1996-02-16 | Seringue de securite automatique non reutilisable |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0809522A1 (fr) |
AU (1) | AU4835596A (fr) |
FR (1) | FR2730639B1 (fr) |
WO (1) | WO1996025192A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU731723B3 (en) * | 2000-09-15 | 2001-04-05 | Occupational & Medical Innovations Ltd | A retractable needle assembly for a catheter and which uses vacuum to retract the needle |
AU2002302130B1 (en) * | 2002-11-18 | 2004-04-22 | Deborah Huang | Disposable syringe |
AU2003204253B1 (en) * | 2003-05-19 | 2004-06-03 | Deborah Huang | Intravenous catheter inserting device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU625527B2 (en) * | 1989-09-18 | 1992-07-16 | Robb Pascal Patent Pty. Ltd. | Syringe |
US5211629A (en) * | 1991-12-23 | 1993-05-18 | Pressly William B S | Safety syringe |
ES2054589B1 (es) * | 1993-01-27 | 1995-03-01 | Mulleras Vicente Montesinos | Jeringuilla retyractil autodestruible. |
-
1995
- 1995-02-17 FR FR9502076A patent/FR2730639B1/fr not_active Expired - Fee Related
-
1996
- 1996-02-16 WO PCT/FR1996/000258 patent/WO1996025192A1/fr not_active Application Discontinuation
- 1996-02-16 EP EP96904155A patent/EP0809522A1/fr not_active Withdrawn
- 1996-02-16 AU AU48355/96A patent/AU4835596A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9625192A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2730639B1 (fr) | 1997-06-13 |
WO1996025192A1 (fr) | 1996-08-22 |
AU4835596A (en) | 1996-09-04 |
FR2730639A1 (fr) | 1996-08-23 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19970811 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 19971204 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19981228 |