Abstract
We have developed a new type of blood pump which has a swinging atrioventricular septal wall. The pump consists of a semicircular housing with only a stationary outlet valve, a swinging septal wall with an inlet valve, and a drive shaft connected with one end of the septal wall. The driving shaft is directly connected to a low speed DC motor. Because of its simplicity, this new blood pump is expected to have excellent durability. The maximum stroke volume of the pump is about 70 mL. It can discharge the maximum stroke volume even in a region of high pulse rate. Therefore, the output flow rate increased in proportion to the pump beat rate up to 150 bpm. The maximum output flow rate was 10 L/min.