Abstract
An implantable artificial heart was made using ultra-sonic motor which was lighter and smaller than the other motor. The design of the artificial heart for the implantation in the calf was studied. The ultra-sonic motor used in the artificial heart was USR-60-4-100 type made in Shinsei Industry, worked at the driving rate of 40-120rpm controlled electrically from outside. A crank made the one-directional revolution into the reciprocation, then two sacs inside the driver were pushed alternately by the pusherplates at the both ends of the crank. Two sacs, blood chambers, were made of polyurethane rubber. Björk-Shiley valves were placed at inflow and outflow of the sacs. Design of the artificial heart was studied using the model of atrial cuffs and arterial grafts for the implantation of the artificial heart in the calf. The distance between left and right inflow orifices of the sacs was too far, and the position of the outflow orifices was not adequate for the connection to great vessels. It became obvious that the design of the casing of the artificial heart should be changed simultaneously.
