右心用小型磁気浮上遠心ポンプの開発

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  • Development and experimental study of small sized centrifugal blood pump with magnetically suspended impeller for right heart replacement.

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A small sized centrifugal blood pump with a magnetically suspended impeller for right heart (RMSCP) was developed and it's hydrodynamial pump characteristics and power consumption for magnetic bearings were comparered with a large model for left heart (LMSCP). The RMSCP operates at 2000rpm with an efficiency of 28.3% at a flow rate of 5L/min and a pressure rise of 20mmHg. And it can operate up to a flow rate of 8L/min and a pressure rise of 150mmHg with a magnetic coupling distance of 1.85mm. This results suggest that the RMSCP can be used for left heart assist or replacement. The RMSCP can operate up to a flow rate of 8L/min and a pressure rise of 90mmHg and the magnetic bearing of it require apploximatelly 13.5w of electric power with a magnetic coupling distance of 2.4mm. Sudden reduction of the power for a magnetic bearing of LMSCP at a pump rotational speed of 1600rpm suggest influence of hydrodynamical force to the power.

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  • 人工臓器

    人工臓器 26 (2), 390-395, 1997

    一般社団法人 日本人工臓器学会

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