Abstract
To optimize the hemo-compatibility of a monopivot centrifugal blood pump, the effect of flow path geometry of the impeller on the pump performance, the lift-off characteristics of the impeller, and the hemolytic property for two pump models with different flow path geometry was investigated using computational and experimental fluid dynamics (CFD & EFD) analyses with the hemolysis test. For the CFD analysis, the pump performance, the axial thrust on the impeller, and the estimated index of hemolysis based on the shear stress on blood were calculated. For the EFD analysis, the pump performance and the axial displacement of the impeller were measured. As a result, it was clarified that the pump performance, the lift-off characteristics of the impeller, and the hemolytic level would be improved in terms of the elimination of the front cutout on the flow path of the impeller from the tested monopivot centrifugal pump.
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