Summary
An implantable artificial heart was made using a flat-type brushless dc motor, a cylindrical cam, and Harmonic Drive as a reduction gear. A specially designed cylindrical cam makes the one-directional slow revolution into the reciprocating motion, then two sacs inside the driver are pushed alternately by the pusher plates located at both ends of the cam. The percentage systole of the driver is fixed at 50%. The two sacs, blood chambers, are 87 ml (left) and 81 ml (right) in volume and are made of polyurethane rubber. Björk-Shiley monostrut valves are placed at the inflow and outflow of the sacs.
The artificial heart worked at the driving rate of 39–125 beats/min with a flow rate of 2.9–7.3 1/min, consuming 15–43 W of electric power. The temperature at the surface of the driver increased by 3.9°C, while that of the saline in the mock circulatory system rose by 0.4°C. This artificial heart was implanted in a 120-kg calf, and various problems were clarified.
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© 1988 Springer Japan
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Fukunaga, S., Hamanaka, Y., Ishihara, H., Sueda, T., Matsuura, Y. (1988). Implantable motor-driven artificial heart. In: Akutsu, T., et al. Artificial Heart 2. Springer, Tokyo. https://doi.org/10.1007/978-4-431-65964-8_37
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DOI: https://doi.org/10.1007/978-4-431-65964-8_37
Publisher Name: Springer, Tokyo
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