Completely implantable electro-mechanical ventricular assist device (VAD) has been developed. This device is intended for the patients of 50-60kg weight. The blood pump housing is made of titanium alloy (Ti-6Al-7Nb) and flexing blood-contacting diaphragm is made of segmented polyurethane with MPC coating. In vitro and In vivo tests showed good performance as a left ventricular support device. For the further improvement of endurances, impact strength of the mechanical in the mock loop simulating the systemic circulatory condition resulted in possibilities of deterioration of endurance performance under the specific control condition. For the further improvements in higher endurance and higher efficiency, precise evaluation of optimal control patter of motor speed that will not prevent the pump for full fill condition is needed.
