Abstract
Since our left ventricular assist divice works automatically on the Starling's law of the heart, total heart lung bypass has been tested in 7 dogs using this device instead of usual roller pump. The circuit line to the pump and to the body was closed circuit, and open reservoirr to get blood through the suction line was connected to this closed circuit under the control of solenoid pinch valve which was closed when the blood level in the reservoir went down. This method made possible to maintain the extracorporeal circulation automatically up to 20 hours, in which the output was automatically controlled by the venous return and also circulating blood volume was automatically maintained normally at the blood level in the reservoir.
