Detachable needle syringe having reduced dead space

Details Detachable needle syringe having reduced dead space Detachable needle syringe having reduced dead space

A - Human Necessities

61

M

A61M 5/34 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2659176

A syringe and detachable needle assembly having reduced dead space features includes an elongate syringe barrel having open distal end including a collar and a distally facing annular surface projecting inwardly from the collar. A needle assembly includes a hub having a proximally facing annular surface and an outwardly projecting annular sealing ring positioned distally from the surface. The needle assembly also includes a cannula having a lumen therethrough connected to the distal end of the hub. Structure is provided for engaging the hub to the barrel resulting in the annular surface of the barrel contacting the annular surface of the hub to form a primary seal between said barrel and said hub and the annular sealing ring contacting the collar to form a secondary seal between the barrel and the hub.

L'invention concerne un ensemble seringue et aiguille détachable doté de caractéristiques d'espace mort réduit et comportant un cylindre de seringue allongé possédant une extrémité distale ouverte comportant un collier et une surface annulaire faisant face de façon distale se projetant vers l'intérieur au niveau du collier. Un ensemble d'aiguille comporte un moyeu possédant une surface annulaire faisant face de façon proximale et une bague d'étanchéité annulaire se projetant vers l'extérieur disposée de façon distale par rapport à la surface. L'ensemble d'aiguille comporte également une canule munie d'une lumière la traversant reliée à l'extrémité distale du moyeu. Une structure est conçue pour engager le moyeu sur le cylindre, permettant à la surface annulaire du cylindre d'entrer en contact avec la surface annulaire du moyeu pour former un joint d'étanchéité primaire entre ledit cylindre et ledit moyeu ; et la bague d'étanchéité annulaire entre en contact avec le collier pour former un joint d'étanchéité secondaire entre le cylindre et le moyeu.

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