Development of a compact, sealless, tripod supported, magnetically driven centrifugal blood pump.
Development of a compact, sealless, tripod supported, magnetically driven centrifugal blood pump.
复制标题
开发紧凑、无密封、三脚架支撑、磁驱动离心血泵。
作者：
A. Yuhki;M. Nogawa;S. Takatani
在这项研究中，三脚架支撑的无密封离心血泵的设计和制造植入式应用使用一个专门设计的直流无刷电机。三脚架结构由安装在叶轮底面的3个陶瓷球组成，这些陶瓷球在底部泵壳上的聚乙烯凹槽中移动。叶轮内的从动磁体与底部泵壳外的电机的驱动磁体耦合，从而允许叶轮在电机转动时在聚乙烯凹槽中滑动-旋转。泵驱动器的重量为230 g，直径为60 mm。丙烯酸泵壳的重量为220 g，灌注量为25 ml。在泵转速为1，000至2，200的情况下，所产生的水头压力范围为30至150 mm Hg，最大系统效率为12%。当原型泵用于脉动模拟回路中以辅助心室从其心尖到主动脉时，在电机电流和旁路流量波形之间获得了强相关性。波形变形指数（WDI），定义为电机电流功率谱密度的基波与高次谐波之比，计算可能检测到由于原型离心泵而在心室内发生的抽吸。当通过调节电机转速将WDI保持在0.20以下时，成功地抑制了由于心室中的离心泵引起的抽吸。原型无密封离心泵与基于电机电流波形分析的控制方法一起可以提供衰竭的左心室或右心室桥接至心脏移植的中间支持。
In this study, a tripod supported sealless centrifugal blood pump was designed and fabricated for implantable application using a specially designed DC brushless motor. The tripod structure consists of 3 ceramic balls mounted at the bottom surface of the impeller moving in a polyethylene groove incorporated at the bottom pump casing. The follower magnet inside the impeller is coupled to the driver magnet of the motor outside the bottom pump casing, thus allowing the impeller to slide-rotate in the polyethylene groove as the motor turns. The pump driver has a weight of 230 g and a diameter of 60 mm. The acrylic pump housing has a weight of 220 g with the priming volume of 25 ml. At the pump rpm of 1,000 to 2,200, the generated head pressure ranged from 30 to 150 mm Hg with the maximum system efficiency being 12%. When the prototype pump was used in the pulsatile mock loop to assist the ventricle from its apex to the aorta, a strong correlation was obtained between the motor current and bypass flow waveforms. The waveform deformation index (WDI), defined as the ratio of the fundamental to the higher order harmonics of the motor current power spectral density, was computed to possibly detect the suction occurring inside the ventricle due to the prototype centrifugal pump. When the WDI was kept under the value of 0.20 by adjusting the motor rpm, it was successful in suppressing the suction due to the centrifugal pump in the ventricle. The prototype sealless, centrifugal pump together with the control method based on the motor current waveform analysis may offer an intermediate support of the failing left or right ventricle bridging to heart transplantation.
测试磁悬浮连续流心室辅助装置的控制器设计、实现和性能。
影响因子：
2.4
作者：
Hilton,EF;Allaire,PE;Wei,N;Baloh,MJ;Bearnson,G;Olsen,DB;Khanwilkar,P
通讯作者：
Khanwilkar,P