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Successful Thermal Management of a Totally Implantable Ventricular Assist System
Author(s) -
Tasai Kimitaka,
Takatani Setsuo,
Orime Yukihiko,
Damm George,
Ohara Yasuhisa,
Naito Kozo,
Makinouchi Kenzo,
Mizuguchi Kazumi,
Matsuda Yukihiro,
Shimono Takatsuga,
Glueck Julie,
Noon George P.,
Nosé Yukihiko
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.tb03298.x
Subject(s) - water cooling , materials science , thermal conduction , aluminium , heat flux , thermal conductivity , thermal , biomedical engineering , composite material , mechanical engineering , heat transfer , medicine , thermodynamics , engineering , physics
Thermal management of the implantable ventricular assist system (VAS) is important not only from the pathophysiological point of view but also from the standpoint of system endurance. The heat distribution within the Baylor VAS was measured using different motor housing materials and environmental conditions. The temperature of the circulating water in the mock loop was set at 37° and 42°C. A polycarbonate motor housing was not a suitable material because of the high temperature development in the actuation system. An anodized aluminum housing demonstrated excellent heat conductivity. The surface temperature of this motor housing was 41.6°C when immersed in circulating water at 42°C. Heat conduction from the motor to the circulating blood revealed an effective thermal path. In the worst case, the heat flux of the motor to the circulating blood revealed an effective thermal path. In the worst case, the heat flux of the motor housing was calculated to be less than 0.062 W/cm 2 —an acceptable level for the surrounding tissues.