A magnetically levitated centrifugal blood pump with a simple-structured disposable pump head
A magnetically levitated centrifugal blood pump with a simple-structured disposable pump head
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DOI：
10.1111/j.1525-1594.2008.00576.x
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发表时间：
2008-07-01
影响因子：
2.4
通讯作者：
Shimokohbe, Akira
中科院分区：
文献类型：
--
作者：
Hijikata, Wataru;Shinshi, Tadahiko;Shimokohbe, Akira
一种用于一次性体外系统的磁悬浮离心血泵（MedTech Dispo）已经被开发出来。该泵的设计旨在消除与叶轮的机械接触，以方便简单的一次性机构，并减少由电动机和磁性轴承引起的血液加热效应。与叶轮相连的轴承转子由位于转子外部的二自由度可控径向磁轴承定子悬浮。在环形转子内部的空间中，放置了一个磁力耦合盘来旋转转子，并确保泵头与电机热隔离。在该系统中，由于采用了新颖的封闭磁路设计，转子具有较高的被动刚度。一次性泵头，其引液量为23毫升，由上下外壳，叶轮和直径为50毫米的转子组成。该泵可以提供超过300毫米汞柱的水头压力，流量为5升/分钟。MedTech Dispo的标准化溶血指数为0.0025 +/- 0.0005 g/100 L, 5 L/min, 250 mm Hg。这是生物泵BPX-80 （Medtronic, Inc., Minneapolis， MN， USA）等效数据的七分之一，其值为0.0170 +/- 0.0096 g/100 L。这些结果表明，MedTech Dispo具有高泵送性能和低血液创伤。
A magnetically levitated centrifugal blood pump (MedTech Dispo) has been developed for use in a disposable extracorporeal system. The design of the pump is intended to eliminate mechanical contact with the impeller, to facilitate a simple disposable mechanism, and to reduce the blood-heating effects that are caused by motors and magnetic bearings. The bearing rotor attached to the impeller is suspended by a two degrees-of-freedom controlled radial magnetic bearing stator, which is situated outside the rotor. In the space inside the ringlike rotor, a magnetic coupling disk is placed to rotate the rotor and to ensure that the pump head is thermally isolated from the motor. In this system, the rotor can exhibit high passive stiffness due to the novel design of the closed magnetic circuits. The disposable pump head, which has a priming volume of 23 mL, consists of top and bottom housings, an impeller, and a rotor with a diameter of 50 mm. The pump can provide a head pressure of more than 300 mm Hg against a flow of 5 L/min. The normalized index of hemolysis of the MedTech Dispo is 0.0025 +/- 0.0005 g/100 L at 5 L/min against 250 mm Hg. This is one-seventh of the equivalent figure for a Bio Pump BPX-80 (Medtronic, Inc., Minneapolis, MN, USA), which has a value of 0.0170 +/- 0.0096 g/100 L. These results show that the MedTech Dispo offers high pumping performance and low blood trauma.