Design and evaluation of a single-pivot supported centrifugal blood pump.
Design and evaluation of a single-pivot supported centrifugal blood pump.
复制标题
单枢轴支撑离心血泵的设计和评估。
DOI：
10.1046/j.1525-1594.2001.06856.x
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发表时间：
2001
影响因子：
2.4
通讯作者：
S. Takatani
中科院分区：
文献类型：
--
作者：
M. Yoshino;M. Uemura;K. Takahashi;N. Watanabe;H. Hoshi;K. Ohuchi;M. Nakamura;H. Fujita;T. Sakamoto;S. Takatani
为了开发一种符合长期植入式循环支持装置要求的离心血泵，本研究设计了一种单枢轴轴承支撑的离心血泵，以评估其基本性能。单枢轴结构由安装在叶轮底面上的陶瓷球阳枢轴和安装在底部泵壳中的聚乙烯阴枢轴组成。安装在叶轮内部的从动磁体磁耦合到安装在直流无刷电机的轴上的驱动磁体。当电机旋转时，叶轮旋转，完全由单枢轴轴承系统支撑。在模拟循环回路中获得的静态泵性能显示，作为左心室辅助装置，在流量和头压方面具有可接受的性能。在2，000至2，200 rpm的转速下，获得了5L/min的泵流量和100 mm Hg的压头。最大泵流量为9 L/min，转速为2，200 rpm。在泵流量为4至5 L/min时，最大电液功率转换效率约为14%。在泵转速高于1，400时，叶轮的稳定性得到了证明，其顶部采用单枢轴轴承，无需额外支撑。单枢轴支撑离心泵作为心室辅助装置可以提供足够的流量和压力，但其机械稳定性和溶血以及血栓形成性能必须在临床使用之前进行测试。
In order to develop a centrifugal blood pump that meets the requirements of a long-term, implantable circulatory support device, in this study a single-pivot bearing supported centrifugal blood pump was designed to evaluate its basic performance. The single-pivot structure consisted of a ceramic ball male pivot mounted on the bottom surface of the impeller and a polyethylene female pivot incorporated in the bottom pump casing. The follower magnet mounted inside the impeller was magnetically coupled to the driver magnet mounted on the shaft of the direct current brushless motor. As the motor rotated, the impeller rotated supported entirely by a single-pivot bearing system. The static pump performance obtained in the mock circulatory loop revealed an acceptable performance as a left ventricular assist device in terms of flow and head pressure. The pump flow of 5 L/min against the head pressure of 100 mm Hg was obtained at rotational speeds of 2,000 to 2,200 rpm. The maximum pump flow was 9 L/min with 2,200 rpm. The maximum electrical-to-hydraulic power conversion efficiency was around 14% at pump flows of 4 to 5 L/min. The stability of the impeller was demonstrated at the pump rpm higher than 1,400 with a single-pivot bearing without an additional support at its top. The single-pivot supported centrifugal pump can provide adequate flow and pressure as a ventricular assist device, but its mechanical stability and hemolytic as well as thrombotic performances must be tested prior to clinical use.