A passively suspended Tesla pump left ventricular assist device.
A passively suspended Tesla pump left ventricular assist device.
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DOI：
10.1097/mat.0b013e3181bae73e
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发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
Rosenberg G
中科院分区：
文献类型：
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作者：
Izraelev V;Weiss WJ;Fritz B;Newswanger RK;Paterson EG;Snyder A;Medvitz RB;Cysyk J;Pae WE;Hicks D;Lukic B;Rosenberg G
本文介绍了一种新型被动悬挂特斯拉型LAVD血泵的设计和初步试验结果。在泵的设计中使用了CFD分析。原型装置的总尺寸为直径50 mm和长度75 mm。泵转子的密度低于血液的密度，并且当在血液中在定子内旋转时，其产生在径向方向上悬挂转子的浮力定心力。转子和定子之间的轴向磁力在轴向方向上约束转子。该泵能够在8000 RPM下以70 mmHg压头升高泵送高达10升/分钟。对于2 - 9.7 L/min之间的流量，该泵已证明溶血水平的标准化指数低于0.02 mg/dL。入口压力传感器也已纳入入口套管壁中，并将用于控制目的。一项初步的体内研究显示了令人鼓舞的结果。计划进行进一步的CFD建模改进以及器械的耐久性测试。
The design and initial test results of a new passively suspended Tesla type LAVD blood pump are described. CFD analysis was used in the design of the pump. Overall size of the prototype device is 50 mm in diameter and 75 mm in length. The pump rotor has a density lower than that of blood and when spinning inside the stator in blood it creates a buoyant centering force that suspends the rotor in the radial direction. The axial magnetic force between the rotor and stator restrain the rotor in the axial direction. The pump is capable of pumping up to 10 liters/min at a 70 mmHg head rise at 8000 RPM. The pump has demonstrated a normalized index of hemolysis level below .02 mg/dL for flows between 2 and 9.7 L/min. An inlet pressure sensor has also been incorporated into the inlet cannula wall and will be used for control purposes. One initial in vivo study showed an encouraging result. Further CFD modeling refinements are planned as well as endurance testing of the device.