BiVACOR (United States)

A magnetically suspended total artificial heart has been developed with a single magnetically suspended motor. The device has double pumps which replace left and right ventricles. A stator which has both of a magnetic bearing core and a motor stator core is set at center of the device. The left and right pump impellers are connected with a shaft through the center hall of the stator core. Attractive forces produced by the motor and the magnetic bearing are made balance to suspend the rotating impellers. The flow balance between the left and right pump is adjusted by shifting the axial impeller position of the impellers adjusted. The left pump produces a flow rate of 5 L/min at the pump head of 102 mmHg, the right pump produces the flow rate of 5 L/min at the pump head of 25 mmHg with the rotating speed of 2100 rpm.