Washout hole flow measurement for the development of a centrifugal blood pump.
Washout hole flow measurement for the development of a centrifugal blood pump.
复制标题
用于开发离心血泵的冲洗孔流量测量。
DOI：
10.1046/j.1525-1594.1998.06140.x
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发表时间：
1998
影响因子：
2.4
通讯作者：
B. Asztalos
中科院分区：
文献类型：
--
作者：
M. Nishida;T. Yamane;B. Asztalos
离心血泵叶轮中的冲洗孔减少了血液易于停滞的区域中的血栓形成，特别是在叶轮的后间隙中。在这项研究中，通过冲洗孔的流量是量化的压力测量和流动可视化与300%的比例放大模型，以了解通过冲洗孔和流量本身的驱动力。当外部回路电阻恒定时，由叶尖速度的平方归一化的压力分布是恒定的，并且与叶轮转速无关。通过冲洗孔的流速与外部回路的流速的比率也是恒定的。当外部回路阻力增加时，叶轮的前后间隙之间的冲洗孔处的压力差增加，并产生通过冲洗孔的更大的流速。
Washout holes in the impeller of a centrifugal blood pump reduce thrombus formation in areas where blood is apt to stagnate, especially in the back gap of the impeller. In this study, flow through the washout holes is quantified by pressure measurement and flow visualization with a 300% scaled-up model to understand the force driving flow through the washout holes and the flow itself. When external circuit resistance is constant, pressure distribution normalized by the square of the tip speed is constant and independent of the impeller rotational speed. The ratio of the flow rate through the washout holes to the flow rate of the external circuit is also constant. When the external circuit resistance increases, the pressure difference at the washout holes between the front and back gap of the impeller increases and generates a greater flow rate through the washout holes.