Pre-filled safety diluent injector

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/31 (2006.01) A61M 5/24 (2006.01) A61M 5/32 (2006.01) A61M 5/28 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2440889

A safety needle-bearing device (10, 110, 210, 310) for mixing and injecting medication from a two-chambered cartridge (50, 150, 250, 350) is provided. The device includes a needle (12, 112, 212, 312) that extends through the forward end of a barrel (30, 130, 230, 330). The two-chambered cartridge (50, 150, 250, 350) is attached to the barrel (30, 130, 230, 330) and contains components of a medication stored separately in the chambers. A plunger (40, 140, 240) in the rearward end of the cartridge can be advanced into the cartridge to combine the separate components and prepare the medication. As the cartridge (50, 150, 250, 350) is advanced forwardly into the barrel (30, 130, 230, 330), the medication is injected through the needle (12, 112, 212, 312) and into a patient. At the completion of the injection stroke, the cartridge (50, 150, 250, 350) engages a needle retainer to actuate needle retraction. The needle is subsequently retracted to shield the contaminated needle.

L'invention concerne une dispositif à aiguille de sécurité (10, 110, 210, 310) utilisé pour mélanger et injecter un médicament à partir d'une cartouche à deux chambres (50, 150, 250, 350). Ce dispositif comprend une aiguille (12, 112, 212, 312) qui s'étend à travers l'extrémité avant d'un corps (30, 130, 230, 330). La cartouche à deux chambres (50, 150, 250, 350) est fixée au corps (30, 130, 230, 330) et contient les composants d'un médicament stocké séparément dans les chambres. Un piston (40, 140, 240), placé dans l'extrémité arrière de la cartouche, peut être avancé à l'intérieur de la cartouche pour combiner les composants séparés et préparer le médicament. Tandis que la cartouche (50, 150, 250, 350) est avancée à l'intérieur du corps (30, 130, 230, 330), le médicament est injecté à travers l'aiguille (12, 112, 212, 312) et dans le corps d'un patient. Lorsque la course d'injection est terminée, la cartouche (50, 150, 250, 350) vient en contact avec un dispositif de retenue d'aiguille pour provoquer le retrait de l'aiguille. L'aiguille contaminée est ensuite rentrée pour être recouverte.

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