New Mechanism to Reduce the Size of the Monopivot Magnetic Suspension Blood Pump: Direct Drive Mechanism |
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Authors: | Takashi Yamane Masahiro Nishida Toshihiko Kijima Jun Maekawa |
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Affiliation: | Mechanical Engineering Laboratory, Tsukuba;Research and Development Center, Terumo Corporation, Kanagawa, Japan |
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Abstract: | Abstract: Size reduction of the monopivot magnetic suspension blood pump has been achieved by reducing the size of the magnetic suspension and employing a direct drive mechanism in place of a brushless DC motor and a magnetic coupling. The flow has also been improved using a closed hollow impeller to remove flow obstruction at the inlet and using radial straight vanes to reduce the impeller speed by 30%. Hemolysis testing was conducted for the new models. Results showed that model DD1 presented only a slightly higher level of hemolysis than a regular extracorporeal centrifugal pump. |
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Keywords: | Centrifugal blood pump Magnetic suspension Direct drive Totally implantable artificial heart Closed impeller |
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