Patent ID: 8827977
Filing Date: 2014-09-09
Classification: A61J,Y10T

Abstract:
1. A pressure regulating vial adaptor for coupling with a vial, the adaptor comprising: a cap connector configured to couple the adaptor with the vial; a medical connector interface configured to couple the adaptor with a medical device; a piercing member configured to pierce a septum of the vial upon coupling the adaptor with the vial, the piercing member comprising a sheath portion having at least one piercing member aperture in fluid communication with a regulator channel and an extractor aperture in fluid connection with the interior of the vial; and an expansion member connected to the piercing member, the expansion member configured to move between a first orientation in which at least a portion of the expansion member is at least partially unexpanded or folded and a second orientation in which at least a portion of the expansion member is at least partially expanded or unfolded when medicinal fluid is withdrawn from the vial, wherein the expansion member is configured to expand both a) in a direction that is at least orthogonal to the elongate axis of the piercing member, at least partially in response to a change in a volume of a medicinal fluid contained in the vial, and b) without increasing an overall length of the vial adaptor, the overall length defined as a distance between a proximal end of the vial adaptor and a distal end of the vial adaptor.