CARDIOPULMONARY BYPASS SYSTEM-MOUNTABLE ANESTHETIC MACHINE PUMP OPERATED WITH COMPRESSED AIR

Abstract

Miniaturization of the cardiopulmonary bypass system may provide several benefits and improvement of patient care. Our portable and disposable CPB system consists of a circuit, a hard shell reservoir, an oxygenator, and our designed pump. The reservoir had three chambers, one drainage and two suction chambers. These chambers can control the negative pressure when connected with an ordinary vacuum system in the operating room. In this study, the probability of compressed air of the operating room for power source of the pump is examined. Our newly designed pump is operated with compressed air and has similar characteristics of an IABP. The air chamber of the shape of a pipe made from an acryl to which it was presupposed that the pulsatile is added to a centrifugal pump as reported (1995), and making the inside of chamber into a positive pressure as the polyurethane inner tube was compressed. Since it develops as a perfusion pump, capacity is made to increase. It shall he used as a pump by equipping an outflow side with the one-way valve. The perfusate from the reservoir is led to the balloon-like inner tube made from a acryl by the inner tube of Y characters at the shape of a balloon in the hard shell reservoir, and is elected by the compressed air. By using compressed air, it IS possible to perfuse up to 10 liters per minute, under bench testing. Preliminary tests found very satisfactory results concerning its operation. It is necessary to continue make it more performance for human use.