An Electrically-Driven Rotary Blood Pump Based on the Wankel Engine
作者： Norimasa Mitsui , Patrick Havlik , Thierry Mesana , Jean Trinkl , Jean-Luc Tourres
DOI: 10.1007/978-4-431-67023-0_37
关键词: Biomedical engineering 、 Blood pump 、 Rotor (electric) 、 Direct current 、 Wankel engine 、 Ventricular assist device 、 Materials science 、 DC motor 、 Power (physics) 、 Pistonless rotary engine
摘要: Our laboratory is developing an implantable electrically-driven left ventricular assist device. The device consists of a rotary pump coupled with brushless direct current (DC) motor. pump, which based on the Wankel engine principle and composed elliptically-shaped rotor housing, produces semi-pulsatile flow without valves. DC motor directly drives shaft at low speeds ranging from 20 to 180 rotations per min (rpm). pump-motor unit connected external power control by thin electric cable. titanium alloy prototype has stroke volume 60 cm3 able deliver mean over 81/min. In vivo experiments have been performed. Four lasted longer than 10 days (maximum 13 days) two for 6 days. Moderate hemolysis initial decrease in platelet count were observed. Further improvement will be necessary permit long-term use reduce adverse effects blood cells.
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