FR2621824A1 - Device for making single-use syringes irreparably unusable after first use - Google Patents

Device for making single-use syringes irreparably unusable after first use Download PDF

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Publication number
FR2621824A1
FR2621824A1 FR8714347A FR8714347A FR2621824A1 FR 2621824 A1 FR2621824 A1 FR 2621824A1 FR 8714347 A FR8714347 A FR 8714347A FR 8714347 A FR8714347 A FR 8714347A FR 2621824 A1 FR2621824 A1 FR 2621824A1
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France
Prior art keywords
piston
head
syringe
strips
plunger
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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.)
Pending
Application number
FR8714347A
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French (fr)
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Medipro
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Medipro
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Publication date
Application filed by Medipro filed Critical Medipro
Priority to FR8714347A priority Critical patent/FR2621824A1/en
Publication of FR2621824A1 publication Critical patent/FR2621824A1/en
Pending legal-status Critical Current

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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
    • 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
    • A61M5/50—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
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
    • A61M2005/5026—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston allowing single filling of 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
    • A61M5/50—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
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston

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)

Abstract

The invention relates to a device preventing the user from reusing so-called single-use syringes, thus preventing the transmission of infection. It consists of a syringe body 1, a plunger 2 comprising a rigid cylindrical head 3 and a propulsion rod 4, rigid plates 5, whose base 6 is inserted into the body of the syringe. The user frees the locking device 7 intended to prevent accidental movement of the plunger before use, draws in the liquid to be injected, purges the air contained in the syringe and performs the injection. The separated rigid plates 5 prevent retraction of the plunger 2. Any attempted forcible retraction tears the plates, whose base 6 may be weakened, damages the head 3 of the plunger 2, which may itself also be weakened, and can break the connection between the head 3 and the rod 4 of the plunger 2, if the former is weakened.

Description

La présente invention concerne un dispositif pour rendre irrémé diablement inutilisables, après la première utilisation, les seringues dites à "usage unique". The present invention relates to a device for making irremediably unusable, after first use, the so-called "single use" syringes.

Deux types de seringues à usage médical sont actuellement disponibles : les unes réutilisables, c'est-à-dire fabriquées en matériaux permettant lavage et stérilisation, les autres à usage dit "unique" non restérilisables disponibles vides ou renfermant un produit injectable (par exemple vaccin). Les seringues à usage dit "unique" restent cependant fonctionnelles après emploi et peuvent donc être réutilisées sans stérilisation si l'utilisateur ne suit pas les recommandations du fabriquant, d'où un risque important d'infections. Two types of syringes for medical use are currently available: some reusable, that is to say made of materials allowing washing and sterilization, others for so-called "single use" non-re-sterilisable available empty or containing an injectable product (for example vaccine). Syringes for so-called "single use", however, remain functional after use and can therefore be reused without sterilization if the user does not follow the manufacturer's recommendations, hence a significant risk of infections.

Le dispositif selon l'invention permet de remédier à cet inconvénient. The device according to the invention overcomes this drawback.

Une seringue médicale comporte habituellement deux parties
- un corps de seringue cylindrique-creux ayant deux extrémités, l'une distale ouverte permettant l'introduction du piston, l'autre proximale se terminant par un cône de calibre réduit permettant l'éjection du produit à injecter.A medical syringe usually has two parts
- A barrel-hollow syringe body having two ends, one open distal allowing the introduction of the piston, the other proximal ending in a cone of reduced caliber allowing the ejection of the product to be injected.

- un piston qui comporte une tête cylindrique rigide dont le calibre externe, très discrètement supérieur au calibre interne du corps de seringue permet une progression à frottement, assurant l'étanchéité. Une tige de propulsion assure la progression de la tete du piston, en conservant la rigidité du système et en maintenant le piston dans l'axe. - A piston which comprises a rigid cylindrical head whose external caliber, very discreetly greater than the internal caliber of the syringe body allows a friction progression, ensuring sealing. A propulsion rod ensures the progression of the piston head, retaining the rigidity of the system and keeping the piston in the axis.

Le dispositif selon l'invention comporte des modifications du corps de la seringue et de la tête du piston. Le corps de la seringue à la face interne comporte une où plusieurs lamelles rigides préformées, de telle façon que lorsque leur extrémité proximale ( même orientation que le corps de la seringue) est libre, elle fasse saillie dans la lumière de la seringue; l'extrémité distale ou base est fixe, insérée dans la paroi du corps de la seringue. Les lamelles, pour ne pas gêner le progression du piston dans le sens de la vidange, ne doivent pas modifier le calibre interne du corps de la seringue et au mieux seront encastrées dans ses parois. La distance séparant l'extrémité proximale du corps de la seringue doit être supérieure à l'épaisseur de la têtetete du piston.Il existe ainsi avant fonctionnement un espace libre au-delà duquel la progression de la tête du piston libère les lamelles. En cas de seringue présentée vide, un dispositif annexe de blocage, aisé à retirer, bloque le piston avant fonctionnement prévenant une mobilisation involontaire qui libèrerait les lamelles rendant la seringue d'emblée inutilisable. Il s'agit par exemple d'une pièce en forme de "U" dont les branches s'appliquent contre l'extrémité distale du piston et contre l'extrémité proximale du corps de la seringue. Lors de l'emploi d'une seringue vide, l'utilisateur retire les dispositifs de blocage, aspire le liquide à injecter, purge l'air nécessairement contenu dans la seringue, pratique l'injection en poussant le piston. Lors de son parcours, la tête du piston écarte les lamelles, dépasse leur extrémité, libérant les lamelles, empêchant tout retour en arrière. The device according to the invention includes modifications to the body of the syringe and to the piston head. The body of the syringe on the inner face has one where several rigid preformed strips, so that when their proximal end (same orientation as the body of the syringe) is free, it projects into the lumen of the syringe; the distal end or base is fixed, inserted into the wall of the syringe body. The strips, so as not to hinder the progression of the piston in the direction of emptying, must not modify the internal gauge of the body of the syringe and at best will be embedded in its walls. The distance from the proximal end of the syringe body must be greater than the thickness of the plunger head. There is thus before operation a free space beyond which the progression of the plunger head releases the strips. In the case of a syringe presented empty, an additional blocking device, easy to remove, blocks the piston before operation preventing an involuntary mobilization which would release the strips making the syringe immediately unusable. It is for example a piece in the shape of a "U" whose branches are applied against the distal end of the piston and against the proximal end of the body of the syringe. When using an empty syringe, the user removes the blocking devices, aspirates the liquid to be injected, purges the air necessarily contained in the syringe, practices the injection by pushing the plunger. During its course, the piston head spreads the slats, exceeds their end, freeing the slats, preventing any turning back.

Selon une variante, la base d'implantation des lamelles sur le corps de la seringue est fragilisée, afin que toute tentetive de retrait du piston en force entraîne une détérioration définitive du corps de la seringue. According to a variant, the base for implanting the strips on the body of the syringe is weakened, so that any attempt to forcefully withdraw the plunger causes definitive deterioration of the body of the syringe.

Selon une autre variante, la tête du piston présentant une zone de moindre résistance se détériore au contact des lamelles lors des tentatives de retrait du piston en force. According to another variant, the head of the piston having a zone of least resistance deteriorates in contact with the lamellae during attempts to withdraw the piston by force.

Selon une autre variante, la liaison entre la tête du piston et la tige est fragilisée. Lors des tentatives de retrait en force du piston, une rupture se produit entre tête et tige du piston. According to another variant, the connection between the head of the piston and the rod is weakened. During attempts to forcefully withdraw the piston, a rupture occurs between the piston head and rod.

Selon une autre variante, l'espace vide avant fonctionnement situé entre l'extrémité proximale du piston et l'extrémité proximale du corps de la seringue peut être supprimé grâce au blocage des lamelles par un cylindre de faible hauteur, coulissant, indépendant du piston. According to another variant, the empty space before operation situated between the proximal end of the piston and the proximal end of the body of the syringe can be eliminated by blocking the strips by a cylinder of low height, sliding, independent of the piston.

Celui-ci est situé à la face postérieure de la tête du piston avant usage. Lors du retrait du piston, l'anneau recule et reste adhérent à la paroi du corps de la seringue, à distance des lamelles lors de la vidange de la seringue. Le piston libère les lamelles lorsqu'il franchit leur extrémité antérieure comme précédemment.This is located on the rear face of the piston head before use. When withdrawing the piston, the ring moves back and remains adherent to the wall of the body of the syringe, away from the lamellae when the syringe is emptied. The piston releases the strips when it crosses their anterior end as before.

Les caractéristiques et avantages du procédé ressortiront d'ailleurs de la description qui va suivre à titre d'exemple en référence aux dessins annexés:
La figure l représente en coupe longitudinale une forme de réalisation du dispositif avant utilisation. The characteristics and advantages of the process will also emerge from the description which follows by way of example with reference to the appended drawings:
Figure l shows in longitudinal section an embodiment of the device before use.

Le dispositif représenté sur la figure 1 comprend un corps de seringue (1), un piston# (2) comportant une tête cylindrique rigide (3) et une tige de propulsion (4), des lamelles rigidesdont la base (6) est insérée dans la paroi du corps de la seringue. The device shown in FIG. 1 comprises a syringe body (1), a piston # (2) comprising a rigid cylindrical head (3) and a propulsion rod (4), rigid strips of which the base (6) is inserted in the wall of the syringe body.

Un exemple de dispositif de blocage (7) destiné à empêcher la mobilisation involontaire du piston avant utilisation est figuré. An example of a locking device (7) intended to prevent the involuntary mobilization of the piston before use is shown.

La figure 2 représente en coupe longitudinale le système après aspiration du liquide obtenu par retrait du piston (2) par l'utilisateur; la tête (3) du piston libère ainsi les lamelles (5). Figure 2 shows in longitudinal section the system after suction of the liquid obtained by withdrawal of the piston (2) by the user; the head (3) of the piston thus releases the blades (5).

La figure 3 représente en coupe longitudinale le système après injection du produit; la tête (3) du piston (2) se situe au-delà des lamelles (5) qui libérées se ressèrent derrière la tête (3) du piston (2) empêchant tout retour en arrière. Figure 3 shows in longitudinal section the system after injection of the product; the head (3) of the piston (2) is located beyond the lamellae (5) which, released, are gathered behind the head (3) of the piston (2) preventing any turning back.

Le dispositif peut être stérile, réalisé avec des matériaux non toxiques et présenté en étui. Il peut être présenté avec 2 aiguilles, l'une servant à prélever le produit à injecter (si la seringue n'est pas livrée avec le produit à injecter), l'autre servant à l'injection.  The device can be sterile, made with non-toxic materials and presented in a case. It can be presented with 2 needles, one used to withdraw the product to be injected (if the syringe is not delivered with the product to be injected), the other used for injection.

Claims (7)

REY DICATIOWISREY DICATIOWIS 1) Dispositif pour empêcher la réutilisation des seringues dites à usage unique", ca-~l-t^. en ence qu'il comprend un corps de seringue (1), un piston (2) co porv t une tête cylindrique rigide (3) et une tige de propulsion (4), une ou plusieurs lamelles rigides (5) dont la base (6) est insérée dans le corps de la seringue (1), l'espace situé entre l'extrémité libre des lamelles (5) et l'extrémité de la seringue étant supérieur à l'épaisseur de la tête du piston (3) ,ménageant ainsi un espace vide au-delà duquel la progression de la tête libère les lamelles (5) empêchant le retour en arrière de la tête (3) du piston (2). 1) Device for preventing the re-use of so-called single-use syringes ", ca- ~ lt ^. En pregnant it comprises a syringe body (1), a piston (2) co porv t a rigid cylindrical head (3) and a propulsion rod (4), one or more rigid strips (5), the base (6) of which is inserted into the body of the syringe (1), the space between the free end of the strips (5) and the end of the syringe being greater than the thickness of the head of the piston (3), thus providing an empty space beyond which the progression of the head releases the strips (5) preventing the backward movement of the head ( 3) of the piston (2). 2) Dispositif selon la revendication 1, caractérisé en ce que les lamelles (5) ne gênent pas la progression du piston si leur épaisseur est trop importante par incorporation dans le corps de pompe. 2) Device according to claim 1, characterized in that the blades (5) do not interfere with the progression of the piston if their thickness is too great by incorporation into the pump body. 3) Dispositif selon la revendication 1 ou la revendication 2 caractérisé en ce que la base (6) d'implantation des lamelles (5) correspond à une zone de fragilisation du corps de seringue afin que toute tentative de retrait en force du piston (2) entraîne une détérioration définitive du corps de la seringue. 3) Device according to claim 1 or claim 2 characterized in that the base (6) of implantation of the strips (5) corresponds to a zone of weakness of the syringe body so that any attempt to forcefully withdraw the piston (2 ) causes permanent deterioration of the syringe body. 4) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la tête (3) du piston (2) comporte des zones de moindre résistance pouvant se détériorer au contact des lamelles lors de toute tentative de retrait du piston en force. 4) Device according to any one of the preceding claims, characterized in that the head (3) of the piston (2) comprises zones of lower resistance which can deteriorate in contact with the lamellae during any attempt to withdraw the piston by force. 5) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la liaison entre la tête du piston et la tige est fragilisée, toute tentative de retrait en force du piston entrai- nant une rupture entre tête et tige du piston. 5) Device according to any one of the preceding claims, characterized in that the connection between the head of the piston and the rod is weakened, any attempt to forcefully withdraw the piston causing a rupture between head and rod of the piston. 6) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'un dispositif annexe de blocage aisé à retirer bloque le piston avant utilisation, prévenant une mobilisation involontaire du piston qui libérerait les. lamelles.  6) Device according to any one of the preceding claims, characterized in that an annexing blocking device easy to remove blocks the piston before use, preventing involuntary mobilization of the piston which would release them. slats. 7) Dispositif selon l'une quelconque des revendications caractérisé qu'un autre dispositif annexe de blocage des lamelles avant utilisation permette d'éliminer l'espace vide entre l'extrémité de la tête du piston et l'extrémité antérieure de la seringue, facilitant ainsi l'utilisation.  7) Device according to any one of claims characterized that another additional device for blocking the strips before use eliminates the empty space between the end of the piston head and the front end of the syringe, facilitating well use.
FR8714347A 1987-10-19 1987-10-19 Device for making single-use syringes irreparably unusable after first use Pending FR2621824A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8714347A FR2621824A1 (en) 1987-10-19 1987-10-19 Device for making single-use syringes irreparably unusable after first use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8714347A FR2621824A1 (en) 1987-10-19 1987-10-19 Device for making single-use syringes irreparably unusable after first use

Publications (1)

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FR2621824A1 true FR2621824A1 (en) 1989-04-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114405A (en) * 1990-05-21 1992-05-19 Winter Douglas A Single use tamper resistant syringe
US5215524A (en) * 1992-07-14 1993-06-01 Vallelunga Anthony J Plunger for non-reuseable syringe
US5352203A (en) * 1994-03-31 1994-10-04 Vallelunga Anthony J Aspirating non-reuseable syringe
EP2456492A2 (en) * 2009-07-23 2012-05-30 Manoj Pournami Peethambaran Baby Medical non reusable syringes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114405A (en) * 1990-05-21 1992-05-19 Winter Douglas A Single use tamper resistant syringe
US5215524A (en) * 1992-07-14 1993-06-01 Vallelunga Anthony J Plunger for non-reuseable syringe
US5352203A (en) * 1994-03-31 1994-10-04 Vallelunga Anthony J Aspirating non-reuseable syringe
EP2456492A2 (en) * 2009-07-23 2012-05-30 Manoj Pournami Peethambaran Baby Medical non reusable syringes
EP2456492A4 (en) * 2009-07-23 2014-11-05 Manoj Pournami Peethambaran Baby Medical non reusable syringes

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