External plate valves for controlling blood flow through a shunt of a cardiopulmonary bypass pump

摘要

External inlet and outlet pinch-type plate valves for controlling the blood flow through a compressible shunt of a cardiopulmonary bypass pump wherein the valves are not fixedly connected to the compression chamber or housing of the pump so that the distance between the inlet and outlet valves can be adjusted to thereby allow adjustment of stroke volume to fit the needs of the patient being treated.