Investigation on hydrodynamic lubrication of bearings in a left ventricular assisted device  

作　　者：Xiaobing ZHENG Yongjian LI Haosheng CHEN Shengshou HU Jianye ZHOU 

机构地区：[1]State Key Laboratory of Cardiovascular Disease,Fuwai Hospital,National Center for Cardiovascular Diseases,Chinese Academy of Medical Sciences and Peking Union Medical College,Beijing 100037,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China

出　　处：《Friction》2020年第4期746-754,共9页摩擦（英文版）

基　　金：This work is supported by the National Key R&D Program of China(2017YFCO111105);the funding of State Key Laboratory of Tribology,China(SKLT2018B03).

摘　　要：Formations of clots were found inside the hydrodynamic bearings of the left ventricular assisted devices (LVADs) and caused tremendous risks to the long-term use of these devices. For the hydrodynamic bearings used in the LVAD, not only the lubrication status but also the motion of the blood cells in the bearing will take great effect on the performance of the device. Based on the analysis of the hydrodynamic pressures distribution and the flowing trajectory of red blood cells in the lubrication film, the bearing is designed in a region where enough hydrodynamic pressure is generated to float the rotor to reduce the wear, and the entrainment of red blood cells in the gap of the bearing can be prevented to avoid the formation of clots.

关 键 词：hydrodynamic lubrication journal bearing left ventricular assisted device CLOT 

分 类 号：R318[医药卫生—生物医学工程]