Syringe system providing retraction of needle cannula into...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01) A61M 5/24 (2006.01) A61M 5/315 (2006.01) A61M 5/31 (2006.01) A61M 5/34 (2006.01)

Patent

CA 2217057

A cartridge based syringe system utilizes a cartridge piston (125) having an interlocking needle receiving cup (124), retraction cage (131) structure graspable by a conventional plunger hook (117), and a breakaway needle assembly (123) in order to provide simple and reliable retraction of a needle cannula into a disposable medicant cartridge (109). Needle retraction is accomplished by simply reversing the movement of the plunger at the end of an injection stroke. A conventional type of dental syringe can be readily converted into a safety syringe providing the aforementioned needle retraction simply by replacing the disposable parts, i.e., the needle assembly and the medicant cartridge.

Dans un système de seringue à cartouche on utilise un piston de cartouche (125) ayant une coupelle (124) pour recevoir une aiguille verrouillée, une structure de cage de retrait (131) pouvant être saisie par un crochet (117) à piston usuel et un ensemble (123) aiguille cassante, pour assurer un retrait simple et sûr de la canule à aiguille dans une cartouche à médicament jetable (109). Le retrait de l'aiguille se fait simplement par inversion du mouvement du piston à la fin d'une course d'injection. Un type usuel de seringue dentaire peut être converti facilement en une seringue de sécurité permettant le retrait de l'aiguille décrit, simplement par remplacement des parties jetables, par exemple de l'ensemble aiguille et de la cartouche à médicament.

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