Patent ID: 7883499
Filing Date: 2011-02-08
Classification: A61J,A61M,Y10S,Y10T

Abstract:
1. A pressure regulating device for use with a vial, the device comprising: a connector configured to couple the device with a vial; a piercing member having a sheath extending from a base of the piercing member, the piercing member configured to be inserted into the vial when the device is coupled with the vial; an elongate extractor aperture formed in the sheath and positioned in a region spaced from the base of the piercing member; and a bag adapted to be expanded or unfolded inside the vial, the bag configured to move from a first orientation substantially unexpanded or folded to a second orientation at least partially expanded or unfolded and at least partially inside the vial; wherein the bag is sized and positioned to at least partially fit within the vial when the bag is in the second orientation; wherein the bag comprises a layer that is substantially impermeable to a medicinal fluid disposed within the vial, thereby impeding the passage of said medicinal fluid between an outer surface and an inner surface of the bag; and wherein the device regulates the pressure in the vial such that, as the medicinal fluid is withdrawn from the vial, the bag will expand or unfold in order to substantially equilibrate pressure on opposite sides of the bag.