New mechanism to reduce the size of the monopivot magnetic suspension blood pump: direct drive mechanism.
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.
Yamane
T
T
Mechanical Engineering Laboratory, Tsukuba, Japan.
Nishida
M
M
Kijima
T
T
Maekawa
J
J
D002498:Centrifugation; D004389:Durable Medical Equipment; D004574:Electromagnetic Fields; D006354:Heart, Artificial; D006353:Heart-Assist Devices / Q000592:standards* / Q000639:trends; D006461:Hemolysis; D013927:Thrombosis / Q000517:prevention & control