Abstract：Objective To test the performance in vitro of the pure pyrocarbon prosthetic heart valve, so as to seek a better substitute
material for artificial heart valve. Methods According to the accelerated fatigue test method in vitro in the standard of GB 12279,
the in vitro durability test of pure pyrocarbon valve and existing similar silicon pyrolytic carbon valve was carried out. After more
than 400 million cycles of opening and closing, the fracture strength test of the valve frame and the valve plate of the two valves
was conducted. Results The result of durability tests showed that there was no statistical difference between the two valves after
the durability test. The fracture pressure, fracture strength and deformation of pure pyrocarbon discs were significantly increased
compared with those of silicon pyrocarbon discs. The average fracture pressure increased by more than 26%, and the deformation
at fracture increased by more than 27%. Conclusion The pure pyrocarbon valves have the following advantages: uneasy to tear or
fracture after implantation, which may lead to valve failure; better biocompatibility; with less pollution and lower production costs,
which may bring about a better market prospect than ordinary ones.
李海平1，刘丽2，苏春光1. 纯热解碳人工机械心脏瓣膜体外性能试验[J]. 中国医疗设备, 2022, 37(6): 29-34.
LI Haiping1, LIU Li2, SU Chunguang1. In Vitro Performance of Pure Pyrocarbon Prosthetic Heart Valve. China Medical Devices, 2022, 37(6): 29-34.
