Abstract
We have developed small size and right weight oscillating-disk-type centrifugal pumps for an left ventricular assist device and an artificial heart toward intracorporeal implantation. Oscillation angle of the disk in these pumps is 15 degree. The diameter of the disk is 54mm, the maximum inner diameter of the pump housing is 60mm and its maximum outer diameter is 64mm. Total weight and length of the pump for LVAD are 380g and 60mm respectively. Total weight and length of the pump for BVAD or AH are 420g and 90mm respectively. The output flow rate of 5L/min was obtained by the LVAD pump under rotational speed of 3050rpm at 120mmHg mean aortic pressure. Energy conversion efficiency at the specified point was 5.3%. Index of hemolysis of the pump driven under the same condition was 0.0061.
