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Development of a Compact, Highly Efficient, Totally Implantable Motor–Driven Assist Pump System
Author(s) -
OKAMOTO EIJI,
TOMODA KIYOSHI,
YAMAMOTO KATSUYUKI,
MITAMURA YOSHINORI,
MIKAMI TOMOHISA
Publication year - 1994
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.1994.tb03343.x
Subject(s) - suction , actuator , pid controller , dc motor , progressive cavity pump , materials science , variable displacement pump , controller (irrigation) , reciprocating pump , biomedical engineering , automotive engineering , computer science , control theory (sociology) , mechanical engineering , engineering , electrical engineering , temperature control , control (management) , artificial intelligence , biology , agronomy
We have developed a compact, highly efficient, totally implantable assist pump system, which consists of a motor–driven assist pump and a transcutaneous energy and optical information transmission system. The motor–driven assist pump consists of ad. c. brushless motor and a specially designed miniature ball screw. A magnetic coupling mechanism between the blood pump and an actuator provides active blood filling via mild suction force. The controller consists of a PID follow–up controller using an 8–bit one–chip microcomputer. The volume of the pump is 350 ml, and its controller is 210 ml. Pump outflow of 5. 8 L/min was obtained against a mean afterload of 100 mm Hg. The pump showed a high efficiency rate and good durability. An efficiency rate of 19–21% (pump output/motor input) was obtained during 87 days of continuous pumping. No mechanical trouble occurred for an accumulated period of 6 months.