Effects of the inflow reservoir on the flow of the pulsatile blood pump based on engineering analyses.

概要

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Inflow characteristics of a pulsatile blood pump was one of the strongest factor to determine the pump flow. In this study, mathematical and mechanical simulators were employed aiming to improve the inflow characteristics of the pump considering the hydrodynamic effect of the natural atrial function. The results were as follows; 1)The data calculated by the lumped parameter(L-C-R)-type mathematical model indicated that the capacitance element, being incorporated in the pump inlet, has the strongest influence on the pump flow characteristics. 2)The results of the mechanical simulation revealed that the pump flow decreased when the inlet flexible reservoir was attached to the pump inlet. 3)Adequate inflow volume was obtained when the accessory reservoir was activated as a second pump just before the water was ejected from the pump. Further, it was possible to keep the amplitude of the pressure change across the pump inlet at the lowest range. 4)The timing of the pumping of the accessory reservoir was similar to that of the contraction of the natural atrium called the. "atrial kick."
ライフサポート学会の論文