Pressure equalizing device for vial access

A - Human Necessities – 61 – J

Patent

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A61J 1/14 (2006.01) A61J 1/20 (2006.01)

Patent

CA 2671763

A pressure-equalizing vial access device and method providing closed and sealed reconstitution of vial contents. A rigid container with a fixed internal volume is connected with a vent lumen extending into the vial. As pressure in the vial increases, the pressure is equalized with atmospheric pressure by varying the volume of a compartment within the rigid container. The compartment is formed with a volume control device that automatically varies the volume of the compartment in the rigid container to accommodate and equalize the pressure in the vial by increasing or decreasing the volume of the compartment. In one case the volume control device comprises a sliding disk and in another, a bladder that compresses with an increase in volume in the container and expands with a decrease.

L'invention concerne un dispositif d'accès à un flacon avec équilibrage de pression et un procédé fournissant une reconstitution fermée et scellée du contenu de flacon. Un contenant rigide avec un volume interne fixe est connecté à une lumière d'évent s'étendant dans le flacon. A mesure que la pression dans le flacon augmente, la pression est équilibrée avec la pression atmosphérique par la variation du volume d'un compartiment à l'intérieur du contenant rigide. Le compartiment comporte un dispositif de commande de volume qui fait automatiquement varier le volume du compartiment dans le contenant rigide pour recevoir et équilibrer la pression dans le flacon par l'augmentation ou la diminution du volume du compartiment. Dans un cas, le dispositif de commande de volume comprend un disque coulissant, et dans un autre cas, une vessie qui se comprime lors d'une augmentation du volume dans le contenant et s'étend lors d'une diminution.

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