EP0085043A1 - Seringues auto-destructibles - Google Patents

Seringues auto-destructibles

Info

Publication number
EP0085043A1
EP0085043A1 EP19810902214 EP81902214A EP0085043A1 EP 0085043 A1 EP0085043 A1 EP 0085043A1 EP 19810902214 EP19810902214 EP 19810902214 EP 81902214 A EP81902214 A EP 81902214A EP 0085043 A1 EP0085043 A1 EP 0085043A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
diameter
disc
adjacent
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Withdrawn
Application number
EP19810902214
Other languages
German (de)
English (en)
Inventor
Marcelo Chiquiar Arias
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.)
Merctech Inc
Original Assignee
Merctech Inc
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 Merctech Inc filed Critical Merctech Inc
Publication of EP0085043A1 publication Critical patent/EP0085043A1/fr
Withdrawn legal-status Critical Current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
    • A61M5/50—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
    • 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
    • A61M2005/5006—Having means for destroying the syringe barrel, e.g. by cutting or piercing

Definitions

  • This invention relates to improvements in self- destructible or otherwise non-reusable disposable syringes disclosed in Mexican Patent No. 134,368 and corresponding United States Patents 3,951,146 and 3,998,224.
  • the present invention deals with the health hazard problem caused by the common disposable syringes when they are reused for self-administration by the users.
  • the invention is particularly useful in- preventing drug addicts from finding and using said disposable syringes for drug addiction purposes.
  • Some of these devices employed a puncturing pin attached to the syringe piston, which pin would puncture the bottom of the syringe to make it non- reusable after the completion of the injecting stroke of the piston.
  • the resulting protruding pin could prick the fingers of the user, if he or she were not careful.
  • the protruding pin could be extracted and the hole caused by it plugged so as to permit reuse of the syringe.
  • the present invention deals with the problem regarding removing a self-destructing element from the piston of the syringe by -providing oppositely disposed stop means adjacent the open end of the cylinder so as to make it impossible to withdraw the piston, containing the self-destructing elements, from the cylinder, whether said self-destructing element be a knife at the side of the plunger to slit a weakened side wall of the syringe or a puncturing means such as a pin at the bottom of the piston, as described above.
  • the above stop means is most convenientl a rigid disc, such as made of rigid plastic or metal, adhered to the support flanges adjacent the open end of the cylinder and having an interior circular opening with a diameter at least as large as the circular disc of the plunger of the syringe but having a smaller diameter than the diameter of the piston, which is compressible, adjacent the forward side of the disc of the plunger.
  • a rigid disc such as made of rigid plastic or metal, adhered to the support flanges adjacent the open end of the cylinder and having an interior circular opening with a diameter at least as large as the circular disc of the plunger of the syringe but having a smaller diameter than the diameter of the piston, which is compressible, adjacent the forward side of the disc of the plunger.
  • the diametrically opposed contiguous portions of the interior perimeter of the opening itself constitute the oppositely disposed stop means.
  • an annular protuberan is provided which extends sufficiently forwardly of the bottom wall of the cylinder as to protect the fingers of the user from the puncturing pin after it is actuated to punctur the bottom wall and thus make the syringe non-reusable.
  • Thi protuberance is usually cylindrical in shape and can either be an extension of the cylindrical wall of the cylinder or be coaxially disposed therewith but have a small diameter. It is also convenient to provide a circular cover plate for the end of the annular protuberance so as to hide the puncturing pin from view and to make it even more difficult to attempt to close the hole formed thereby after retracting the plunger. Of course, the cylindrical extension in itself makes it difficult to perform these acts.
  • both the upper stopping element and the lower protuberance can be provided.
  • the protuberance adjacent the injection needle of ' the syringe is also particularly useful in enabling the use of a puncturing pin of sufficient length to puncture prior to reaching the end of the full stroke of- the piston without concern regarding possible additional likelihood of harm to the user on final use of the syringe.
  • Figure 1 is a side view of the syringe according to one embodiment of the invention in which the cylinder of ' the syringe as well as its cylindrical protuberance is in longitudinal cross-section as well as the piston, whereas the plunger is exposed.
  • the puncturing pin is shown prior to puncturing the bottom of the cylinder.
  • Figure 2 is a similar view according to Figure 1 of another embodiment with the cylindrical protuberance of a smaller diameter than the walls of the cylinder. Also the figure shows the final puncturing of the bottom wall of the cylinder.
  • Figure 3 is a similar partial cross-sectional view showing another embodiment of the invention having a knife at the side of the piston so as to cut a weakened longitudina -4- gr ⁇ ove in the wall of the cylinder and illustrating stop means adjacent the open end of the cylinder to prevent removal of the piston from the cylinder.
  • Figure 4 illustrates another embodiment of the invention having a protruding pin extending forwardly of the compressible piston whereby removal of the piston is prevented by a combined stop means and support flanges.
  • Figure 4A gives a plan view of the combination support flanges and stop member and Figure 4B shows a plan view of a cover element to be used in the cylindrical pro ⁇ tuberance at the bottom portion of the cylinder.
  • the improved syringes of the present invention include some of the elements described in the above U.S. and Mexican patents by the same inventor, which are repeated here with the same reference numerals while also including the new elements of the improvements which are numbered 1A, IB, 2A, and 2C.
  • the improved syringe of this invention comprises a cylinder 20 of a material capable of being perforated by a puncturing pin, such as plastic, and includes at its upper end a couple of ears 22, which project perpendicularly to the longitudinal central axis of the cylinder and are oppose so as to serve as support flanges for the user.
  • the plunger of the syringe has a pair of flaps 25 intersecting in cross ⁇ wise relationship and terminating at their upper end on a pressing disc 26, and, at their lower end, a piston 27 with annular sealing bosses 28.
  • This embodiment is applicable both to container- syringes (pre-filled syringes) and to empty syringes and includes at the front portion of the piston 27, a puncturing means, pin 67, oriented towards the front of the cylinder 20, parallel to the longitudinal axis of the syringe and coinciding with a groove 68 formed in the forward surface of the bottom wall in a circular shape so that the protrudin pin 67 will always coincide with at least one portion of sai circular groove.
  • Said groove 68 weakens the bottom wall and facilitates, on completion of the stroke of the piston 27, when the solution is injected into the user, the puncturing of cylinder by the puncturing pin 67.
  • a forward stop 69 is included, by which the person assembling this syringe can determine how far that person can extend piston 27 without having the pin 67 puncture the cylinder through the opening 68. It is obvious that when filling the syringe with the injectable solution, one will form an initial air gap, which can be eliminated before injection.
  • the embodiment illustrated in Figure 3 includes a slot or longitudinal weakening 23, in the exterior of cylinder 20, along practically the entire length of same, which has on its end adjacent the ears 22 a punctured portion 24, which penetrates the entire depth of the wall of the cylinder 20.
  • the plunger composed of the flaps 25 includes a disc. Adjacent the disc in one of said flaps is formed a, preferably tubular, recess or seat 39, transverse to the longitudinal axis of the plunger.
  • Compressible means such as a helical spring 40, is lodged in said recess with one end 41 hooked to the base wall of the seat 39 with its other end 42 hooked to a knife 43, which has a rounded rear portion 44 and a straight front portion with a sharp edge -45.
  • This knife goes through a cover plate 46, which closes the front end of the seat 39 and has a slot through which the knife 42 extends.
  • Said slot has a length slightly greater than the height of the knife 43, which allows for a slight play of said knife, so when the plunger formed by flaps 25 is extracted in order to fill the syringe with solution, the knife is slightly displaced towards piston 27, contacting the wall of the cylinder with the rounded portion 44, whereby there will be no cutting of the wall of ⁇ the cylinder.
  • knife 43 will be displaced along the slot of the cover 46 to a position furthest from the base wall of the seat 39, thus forcing the sharp edge 49 in contact with the wall of the cylinder, cutting the cylinder 23 through the slot or
  • the knife does not need to reach the end of its run and project through the punctured portion 24, at the end of the weakened portion 23, in order to cut the cylinder since due to the play of the knife, the latter can cut the cylinder in any intermediate portion of the piston, even when the piston does not reach the maximum backward run. That is, with this embodiment the knife will cut in any position as long as the plunger is moved in a forward position towards the bottom wall of the cylinder, that is when injecting the solution with which the syringe was previously filled.
  • protuberances are provided in the inner wall of the cylinder to contact a flap 21 other than the flap containing the recess 39, similar to the protuberances 29 of U.S. Patent 3,951,146.
  • Another embodiment of the present invention combine the destructing effect of the puncturing pin with that of the cutting knife. It is also possible to have one or more self- destructing elements, whether a puncturing pin, a knife or any other type of self-destructing device as long as the cylinder is of a material, such as plastic, capable of being perforated or cut by said destructing elements during the " normal injection stroke of the plunger or piston of the syringe.
  • the hypodermic needle 57 can be joined by means of an appropriate adhesive to the bottom of the cylinder
  • the safety element 1A which prevents the user from making the destructing element (blade 43) inoperative, such as by removal, comprises an external stopper 1A integrally joined to ears 22 of the cylinder, which stopper is affixed 5 to said ears after assembling the syringe.
  • the inner diamet of element 1A is less than the diameter of piston 27 and thus removal of the plunger together with the piston will cause the piston to be detached from the plunger and remain within the cylinder.
  • the safety element IB used to prevent 0 the user from accidentially getting hurt with the puncturing pin 67 consists of a protecting annular extension integral with the cylinder 20, which extension extends beyond the bottom of the cylinder, where said puncturing pin perforates the bottom wall of the cylinder on the completion of the 5 injection.
  • This protrusion also makes it difficult if not impossible for the hole formed by the protruding pin 67 to be plugged since there is little room for maneuvering wi-thin said protrusion IB.
  • a circular cover plate 2C as shown in Figure 4B, in connection with the embodiment of 0 Figure 4, can be used.
  • the cover plate 2C which can readily be a plastic or metal disc fused to the bottom of the circular protuberance, can make it substantially impossible to seal the hole caused by the puncturing pin 67.
  • Figure 4 shows another embodiment of the inve ' ntion in which piston 27' is of a substantially compressible material but has a rear edge of a substantially flat shape which makes it substantially impossible to withdraw the piston from the cylinder and thus attempt to remove the puncturing pin 67.
  • Stop element 2A is a modified version of stop element 1A in that it is integrally formed with the ears 22' and furthermore has a frusto-conical opening with the diameter of the smallest opening, as defined by edge 2B with a diameter less than that of piston 27'.
  • the sloping walls of the frusto-conical opening make it easy to insert the compressible rubber-like piston 27' into the cylinder but make it substantially impossible to remove the piston 27' from the cylinder.
  • the rubber stopper is -8- conveniently attached to the disc 31* of the plunger by a barb 80 embedded in the disc and extending into the rubber stopper.
  • a cover 2C having a circular opening larger than the diameter of the injection needle 57 can be placed over the end of the cylindrical protuberance IB, thereby making it substantially impossible to repair the hole formed in the bottom wall of cylinder 20 - .
  • stop element 2A can also replace the combination of ears 22 and stop element 1A in the embodiments of Figures 1, 2 and 3.
  • the stop element such as shown in plan view in Fig.
  • the flaps 25 can slidably fit in complementary notches in the interior opening 2B so as to prevent rotation of the plunger, rather than using the previously described protuberances.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (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)
  • Catching Or Destruction (AREA)

Abstract

Améliorations apportées à des articles jetables, en particulier des seringues hypodermiques auto-destructibles ou automatiquement non réutilisables ayant un élément d'auto-destruction (67) qui est actionné pendant la course d'injection du piston. L'invention décrit un organe supérieur d'arrêt (1A), constitué d'une manière générale par une plaque ayant un trou circulaire d'un diamètre qui autorise le retrait du plongeur (25) mais non celui du piston ainsi qu'une projection cylindrique (68) adjacente à l'extrémité d'injection du cylindre et s'étendant au-delà de la paroi cylindrique (20) de manière à protéger les doigts de l'utilisateur contre une pointe auto-destructible (67) passant de force au travers de la paroi de fond du cylindre en bout de la course d'injection. Une plaque de couverture de cette saillie cylindrique ayant un trou intérieur pour l'aiguille d'injection est également illustrée.
EP19810902214 1981-08-04 1981-08-04 Seringues auto-destructibles Withdrawn EP0085043A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1981/001048 WO1983000438A1 (fr) 1981-08-04 1981-08-04 Seringues auto-destructibles

Publications (1)

Publication Number Publication Date
EP0085043A1 true EP0085043A1 (fr) 1983-08-10

Family

ID=22161349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810902214 Withdrawn EP0085043A1 (fr) 1981-08-04 1981-08-04 Seringues auto-destructibles

Country Status (5)

Country Link
EP (1) EP0085043A1 (fr)
JP (1) JPS58501497A (fr)
AU (1) AU7531081A (fr)
NO (1) NO831123L (fr)
WO (1) WO1983000438A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1916088A (en) * 1987-07-21 1989-01-27 Dowty Seals Limited Non-reusable syringe
JP2584462B2 (ja) * 1987-09-18 1997-02-26 ベクトン・ディッキンソン・アンド・カンパニー １回使用の使捨て注射器
AU618238B2 (en) * 1987-09-18 1991-12-19 Program For Appropriate Technology In Health (Path) Single use disposable syringe
FR2632192B1 (fr) * 1988-06-07 1994-09-30 Emerit Michel Seringue a usage unique
US4973310A (en) * 1988-12-30 1990-11-27 Becton, Dickinson And Company Single-use syringe
US4961728A (en) * 1988-12-30 1990-10-09 Becton, Dickinson And Company Single-use syringe having misuse resistant features
ES1054272Y (es) * 2003-03-14 2003-10-16 Tyco Electronics Amp Es Sa Elemento insertable de seguridad para jeringuillas desechables de un solo uso
CN100563736C (zh) * 2007-06-02 2009-12-02 丁锐 一次性防刺伤注射器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951146A (en) * 1972-11-01 1976-04-20 Arias Marcelo Chiquiar Disposable self-destructible syringes which render themselves unreusable
US3998224A (en) * 1973-08-15 1976-12-21 Arias Marcelo Chiquiar Disposable self-destructible syringes which render themselves unreusable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300438A1 *

Also Published As

Publication number Publication date
JPS58501497A (ja) 1983-09-08
AU7531081A (en) 1983-02-22
WO1983000438A1 (fr) 1983-02-17
NO831123L (no) 1983-03-28

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Inventor name: CHIQUIAR ARIAS, MARCELO