Measurement of the rotor motion and corresponding hemolysis of a centrifugal blood pump with a magnetic and hydrodynamic hybrid bearing.
Measurement of the rotor motion and corresponding hemolysis of a centrifugal blood pump with a magnetic and hydrodynamic hybrid bearing.
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DOI：
10.1111/j.1525-1594.2005.29091.x
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发表时间：
2005-07
影响因子：
2.4
通讯作者：
H. Kataoka;Y. Kimura;H. Fujita;S. Takatani
中科院分区：
文献类型：
--
作者：
H. Kataoka;Y. Kimura;H. Fujita;S. Takatani
本研究提出了一种新型磁流体混合被动轴承的离心式血泵，它由径向稳定的滑动轴承和轴向及倾斜稳定的永磁轴承组成。我们测量了轴承的径向运动，并对不同的径向游隙尺寸进行了溶血试验。结果表明，转子的径向运动有两种模式：一种是稳定中心模式，径向运动半径迅速收敛到20微米以下；另一种是不稳定圆周模式，转子悬浮随转速线性增加。在圆形模式下，径向间隙为80微米的泵比间隙较小的泵产生更多的溶血。较高的旋转度或不对称的泵结构可以避免循环模式，但这种模式下的溶血机制尚不清楚。
This study proposed a centrifugal blood pump with a novel magnetic and hydrodynamic hybrid passive bearing, which consisted of a plain journal bearing for radial stability and a permanent magnetic bearing for axial and tilting stability. We measured the radial motion of the bearing and performed hemolysis tests for the different radial clearance sizes. In the results, it appeared that the radial motion had two modes: the stable center mode, in which the radius of the radial motion rapidly converged to less than 20 microm; and the unstable circle mode, in which the rotor suspension linearly increased with the rotation speed. It also appeared that the pumps with the radial clearance of 80 microm caused more hemolysis than with the smaller clearance sizes in the circle mode. The circle mode was avoidable by the higher rotation or the asymmetric pump structure, but the mechanism of hemolysis in this mode was still unclear.