Combined syringe and needle shield

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01) A61M 5/24 (2006.01)

Patent

CA 2085371

The invention provides a medication containing syringe (150) which includes first (166) and second (210) tubular members; a plunger rod assembly (154); a distal needle assembly (176) and a collar member (186). The first tubular member (166) includes distal and proximal ends and a slidable member (171) received therein which is adapted to retain a prefilled quantity of medication distally thereof. The plunger rod assembly includes a reciprocally mounted plunger rod (154) adapted to operatively contact the slidable member (171) through the proximal end of the first tubular member (166). The needle assembly (176) includes distal and proximal ends and a needle hub (174) thereon wherein the needle hub (174) is mounted adjacent the distal end of said first tubular member (166) and the needle assembly (176) also includes a distal needle point (179) on the distal end thereof and the proximal end of the needle assembly is adapted to be in fluid communication with the medication retained distally of the slidable member (171). The collar means (186) is operatively connected to the distal end of the first tubular member (166) and the second tubular member (210) is positioned about the first tubular member (166) and the collar means (186). The second tubular member (210) includes distal and proximal ends and is designed to slidably contact the collar means (186) longitudinally movable over the first tubular member (166) and the collar means (186) between a retracted position wherein the distal needle point (179) is exposed and an extended position wherein the distal needle point (179) is protected. The second tubular member (210) further includes a tapered section (216) on the distal end thereof and the outer diameter of the distal end of the tapered section (216) is substantially smaller than the outer diameter of the proximal end of the second tubular member (210) and when the second tubular member (210) is in the retracted position, the distal end of the second tubular member (210) is adjacent to the needle hub (174) and the distal end of the first tubular member (166).

L'invention porte sur une seringue contenant un médicament (150) et comportant un premier (166) et un second (210) éléments tubulaires, un ensemble tige de piston (154), une aiguille distale (176) et une bague (186). Le premier élément tubulaire (166) comprend des extrémités distale et proximale. Il inclut également un élément coulissant (171) qui s'insère à l'intérieur et qui est conçu pour contenir une quantité de médicament prérempli dans une partie distale à cet élément. L'ensemble tige de piston comporte une tige de piston (154) montée de façon réciproque et adaptée pour toucher l'élément coulissant (171) à travers l'extrémité proximale du premier élément tubulaire (166). L'aiguille (176) comprend des extrémités distale et proximale et un embout (174) monté près de l'extrémité distale du premier élément tubulaire (166). Elle (176) inclut également une pointe d'aiguille distale (179) à son extrémité distale. L'extrémité proximale de l'aiguille est conçue pour communiquer librement avec le médicament contenu dans une partie distale de l'élément coulissant (171). La bague (186) est reliée de façon fonctionnelle à l'extrémité distale du premier élément tubulaire (166), et le second élément tubulaire (210) est placé autour du premier élément (166) et de la bague (186). Le second élément tubulaire (210) inclut des extrémités distale et proximale et est conçu pour toucher de façon coulissante la bague (186). Il se déplace longitudinalement sur le premier élément tubulaire (166) et la bague (186) entre une position rétractée, dans laquelle la pointe d'aiguille distale (179) est exposée, et une position allongée dans laquelle la pointe d'aiguille distale (179) est protégée. Il (210) comprend également à son extrémité distale une section effilée (216). Le diamètre externe de l'extrémité distale de la section effilée (216) est essentiellement inférieur au diamètre externe de l'extrémité proximale du second élément tubulaire (210). Lorsque ce dernier (210) est en position rétractée, son extrémité distale est près de l'embout d'aiguille (174) et de l'extrémité distale du premier élément tubulaire (166).

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