Abstract
Background: The R&D of artificial heart has over 60 years of history. Patients living with a heart pump for several years, become medical routines. The most critical obstacle to extending the clinical applications of heart pumps in clinics is their high price. This paper introduces an inexpensive centrifugal pump that is affordable for most patients. Methods: The present EM(Electric Magnet)-suspended centrifugal pump needs a rotor position detector and a Push-pull system with control to maintain the rotor in its central position. They are very complicated and expensive. In our PM(Permanent Magnet)-suspended centrifugal pump, the rotor is suspended by PM-Bearings, no rotor position detector, and no push-pull system is needed. Therefore the most difficult and expensive parts will not appear in the device. Results and Conclusion: A prototype of such a pump has been designed, manufactured, and tested in vitro. The hemodynamic property, that is, the Hemolysis is the same as the EM-suspended centrifugal pump. In the durability test, the pump rotated continuously for several months, no problem occurred. The pump costed under 10k USDs.
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