Patent attributes
Vacuum break vial assembly and method for reducing the incidence of nosocomial infections, comprising a vial stopper having an apertured needle sheath, and a hole in the bottom of the vial fitted with a single or multi-part bladder-retaining plug/vent assembly. The vial has an aluminum cap holding a plastic flip-off top, removal of which permits access by hypodermic needle through the stopper into the needle sheath. No pre-pressurization of the vial by ambient contaminated air via the hypodermic can occur. Rather, the needle is inserted in the vial through the stopper and the medicinal fluid withdrawn. Air is inlet via a vent into the collapsed bladder secured in the bottom of the vial and the bladder expands to permit withdrawal of fluid into the hypodermic without vacuum lock. No air having pathogen vectors is introduced into the vial medicinal fluid, as the bladder isolates volume-compensating air from the medicinal fluid.
