A cost-effective extracorporeal magnetically-levitated centrifugal blood pump employing a disposable magnet-free impeller
A cost-effective extracorporeal magnetically-levitated centrifugal blood pump employing a disposable magnet-free impeller
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DOI：
10.1177/0954411911422842
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
W. Hijikata;T. Mamiya;T. Shinshi;S. Takatani
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文献类型：
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作者：
W. Hijikata;T. Mamiya;T. Shinshi;S. Takatani
在旋转血泵领域，利用磁力轴承对叶轮进行非接触式支撑已被认为是减少血液损伤和提高耐用性的一种有前途的方法。为了制造低成本的一次性体外离心式血泵泵头，作者研制了一种无永磁体的两自由度径向可控磁悬浮轴承系统。利用该磁悬浮轴承的血泵样机实现了无磁叶轮的稳定悬浮和无接触旋转。叶轮位置在1000r/min~3000r/min之间的径向跳动小于40µm。在相同转速下，磁力轴承的总功耗小于1W。在4000r/min的转速下，泵头压力为78.66kPa时，流量为5 L/min，可满足体外循环支持的需要。建议的技术提供了一次性泵头的低成本大规模生产的优势。
In the field of rotary blood pumps, contactless support of the impeller by a magnetic bearing has been identified as a promising method to reduce blood damage and enhance durability. The authors developed a two-degrees-of-freedom radial controlled magnetic bearing system without a permanent magnet in the impeller in order that a low-cost disposable pump-head for an extracorporeal centrifugal blood pump could be manufactured more easily. Stable levitation and contactless rotation of the ‘magnet-free’ impeller were realized for a prototype blood-pump that made use of this magnetic bearing. The run-out of the impeller position at between 1000 r/min and 3000 r/min was less than 40 µm in the radial-controlled directions. The total power consumption of the magnetic bearing was less than 1 W at the same rotational speeds. When the pump was operated, a flow rate of 5 l/min against a head pressure of 78.66 kPa was achieved at a rotational speed of 4000 r/min, which is sufficient for extracorporeal circulation support. The proposed technology offers the advantage of low-cost mass production of disposable pump heads.