Patent ID: 8267894

Claim:
A self-contained portable apparatus for administration of a drug solution, said apparatus comprising: a housing having an enclosure for receiving a flexible pouch with a first chamber therein containing a drug solution, wherein said enclosure has a second chamber arranged outside said pouch, the chambers being arranged in a pressure-transmitting relation within said enclosure; an output from said first chamber connectable to a conduit for delivering said drug solution to a recipient; and a pressurization system for providing a constant and controllable gas pressure to said second chamber, wherein a controllable pressure is obtained in said first chamber for a controllable delivery of the drug solution, wherein said pressurization system comprises: a pressure source for delivering positive pressure gas; a pressure accumulation tank connected to said pressure source and to said second chamber, arranged to provide a positive pressure reservoir; a one-way valve arranged between said pressure source and said pressure accumulation tank, enabling gas to flow solely in the direction from the pressure source to the pressure accumulation tank; and a mechanical pressure regulator arranged between said pressure accumulation tank and said second chamber, wherein the pressurization system is integrated on or within the housing, the pressure source comprises a mechanical, hand-operated pump, and the second chamber is formed by an inflatable bladder, said inflatable bladder wrapping around the flexible pouch containing the drug solution, wherein the mechanical, hand-operated pump comprises an air compression cup which is slideably arranged over the pressure accumulation tank.