WO1993020870A1 - Safety device for drawing a needle back into a syringe barrel after use - Google Patents
Safety device for drawing a needle back into a syringe barrel after use Download PDFInfo
- Publication number
- WO1993020870A1 WO1993020870A1 PCT/FR1993/000339 FR9300339W WO9320870A1 WO 1993020870 A1 WO1993020870 A1 WO 1993020870A1 FR 9300339 W FR9300339 W FR 9300339W WO 9320870 A1 WO9320870 A1 WO 9320870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- syringe
- piston
- support
- safety syringe
- Prior art date
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- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
Definitions
- Safety device allowing retraction by aspiration of the needle inside the body of a syringe after use.
- the present invention relates to a device making it possible, after normal use of the usual hypodermic needles, to retract, by suction, the needle inside the syringe body in order to avoid any risk of accidental injury to the care and cleaning personnel.
- This device limits the risks of contamination and excludes all possibilities of re-use of the syringe by consumers of prohibited substances.
- syringe body of the conventional type having at its front part (1) an orifice (2) whose periphery is pre-cut (3) in the shape of a star.
- a moving part (5), needle holder (7), anchored in this orifice (2) is retractable inside the body of the syringe, after interlocking with an intermediate part (12), it even moved , by suction, according to the movement of the piston (14) (of conventional type).
- Hypodermic needles or the like such as trocar or catheter cannulas, have been used for a long time in hospitals, clinics, laboratories and other medical places, to collect liquids for analysis or to administer medical care products.
- the separation phase of the soiled needle from the syringe body presents a very significant risk of accidental injury and contamination following treatment given to subjects with communicable or highly 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.
- Essential differences are made by this device, taking into account the safety requirements for all personnel handling needles
- the device of the invention makes it possible, while satisfying the pursued objectives of security, reliability, simplicity, to avoid the drawbacks presented by the various existing devices.
- the device adds to the existing a needle withdrawal function performed by suction.
- This movement at its end, completely releases the piston while leaving inside, after air intake, the intermediate part, the support part and the soiled needle, without having to break the piston.
- the aforementioned orifice (2) in the front part of the syringe, is dimensioned so as to allow the passage of the needle but to prevent the introduction of a finger, however small, in order to exclude all injuries.
- the syringe before use, will be delivered with the intermediate part and the support not fitted so that the filling of the syringe is normally carried out.
- the syringe may be offered to its users filled with the liquid to be injected, thus acting as a bulb.
- Figure 1 general view of the syringe.
- Figure 1 shows a standard type syringe, according to the invention:
- the end (1) is pierced with a circular orifice (2) with a pre-cut (3) in the shape of a star.
- This piece (5) support of the needle, is molded in the materials usually used for the manufacture of syringes according to the sealing constraints of the piston head.
- the molded shape has on the periphery of the part (5) a groove (8) ensuring the tightness and on the rear part (9) concave circular having a circular shoulder (10) and having a certain elasticity due to the materials used.
- This part (5) is pierced axially (11) in the middle to allow the syringe to be filled.
- the pressure exerted at the end of the injection causes the cutout (3) of the front part of the syringe body and releases the part (5), needle holder, previously anchored to the front part (1) of the syringe due to the groove (4) of the part (5).
- the piston (14) does not have to be broken.
- a variant may include a part (18), complementary to the support piece (5), constituting a circular seal improving the tightness of the device.
- Another variant may provide a stop (19) in the rear part of the body of the syringe, facilitating the blocking of the needle / support piece / intermediate piece, after withdrawal of the piston.
- Another variant of the device can provide for the solida-rity of the needle (7) and its support part (5), particularly in the case of small models intended among other uses for vaccines.
- the present description of the device of the invention applies to all types of syringes, of any size, the purpose of the invention being to allow retraction by aspiration of the needle inside.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93908992A EP0593710A1 (en) | 1992-04-08 | 1993-04-05 | Safety device for drawing a needle back into a syringe barrel after use |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR92/04527 | 1992-04-08 | ||
FR9204527A FR2689767A1 (en) | 1992-04-08 | 1992-04-08 | Safety device allowing retraction by aspiration of the needle inside the body of a syringe after use. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993020870A1 true WO1993020870A1 (en) | 1993-10-28 |
Family
ID=9428813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1993/000339 WO1993020870A1 (en) | 1992-04-08 | 1993-04-05 | Safety device for drawing a needle back into a syringe barrel after use |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0593710A1 (en) |
CA (1) | CA2115240A1 (en) |
FR (1) | FR2689767A1 (en) |
WO (1) | WO1993020870A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1356838A1 (en) * | 2002-04-18 | 2003-10-29 | Chi-Hsuan Hsu | Self-locking disposable safety syringe having a retractable needle hub |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747829A (en) * | 1987-01-21 | 1988-05-31 | E. R. Squibb & Sons, Inc. | Pre-filled syringe |
WO1989000432A2 (en) * | 1987-07-17 | 1989-01-26 | Assistance Publique | Non reusable high-security syringe |
US4883471A (en) * | 1988-08-16 | 1989-11-28 | Braginetz Paul A | Disposable shielded medical syringe |
US5000738A (en) * | 1989-05-11 | 1991-03-19 | Lavallo Frank | Protective syringe with frangible barrel |
EP0438368A1 (en) * | 1990-01-17 | 1991-07-24 | Jaime Caralt Batlle | Disposable hypodermic syringe |
-
1992
- 1992-04-08 FR FR9204527A patent/FR2689767A1/en not_active Withdrawn
-
1993
- 1993-04-05 EP EP93908992A patent/EP0593710A1/en not_active Withdrawn
- 1993-04-05 CA CA 2115240 patent/CA2115240A1/en not_active Abandoned
- 1993-04-05 WO PCT/FR1993/000339 patent/WO1993020870A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747829A (en) * | 1987-01-21 | 1988-05-31 | E. R. Squibb & Sons, Inc. | Pre-filled syringe |
WO1989000432A2 (en) * | 1987-07-17 | 1989-01-26 | Assistance Publique | Non reusable high-security syringe |
US4883471A (en) * | 1988-08-16 | 1989-11-28 | Braginetz Paul A | Disposable shielded medical syringe |
US5000738A (en) * | 1989-05-11 | 1991-03-19 | Lavallo Frank | Protective syringe with frangible barrel |
EP0438368A1 (en) * | 1990-01-17 | 1991-07-24 | Jaime Caralt Batlle | Disposable hypodermic syringe |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1356838A1 (en) * | 2002-04-18 | 2003-10-29 | Chi-Hsuan Hsu | Self-locking disposable safety syringe having a retractable needle hub |
Also Published As
Publication number | Publication date |
---|---|
FR2689767A1 (en) | 1993-10-15 |
CA2115240A1 (en) | 1993-10-28 |
EP0593710A1 (en) | 1994-04-27 |
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