血栓・溶血を防ぐ遠心型血液ポンプ形状の改善

概要

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遠心型血液ポンプの内部流れを市販CFDコードを用いて計算し、ポンプ内部でのせん断速度分布や壁面せん断応力を調べることによって、血栓や溶血を防ぐのに有効なポンプ形状について検討した。We conducted computational fluid dynamics(CFD) analysis of centrifugal blood pumps by using commercial code CFX-5 for improvements of a thrombotic and hemolytic performance. We also investigated effects of washout holes of the impeller on thrombus formation around the shaft. Washout holes enhanced flows around the shaft behind the impeller. Numerical simulation suggested that the thrombus formation was suppressed when the position of washout holes was moved to the center of impeller in a radial direction. As for hemolysis, large radial gaps between an impeller and a casing prevented hemolysis although the pump head was slightly decreased.
ターボ機械協会の論文
2005-04-10