摘要
目前对人工机械心脏瓣膜血液动力学特性的测试方法，大部分是采用实验装置进行的。针对模拟结果由于实验装置的不同而可能存在的差异，本研究通过使用SolidWorks软件中的插件工COSMOSFloworks，按照国际标准ISO5840-2005规定的试验条件，通过模拟实验对曾出现的笼球瓣、笼碟瓣、斜碟瓣和双叶瓣进行血液动力学特性进行测试。在压力均为200mmHg的情况下，笼球瓣和笼碟瓣的跨瓣压差均大于40mmHg，相应的有效开口面积约为1cm^2；斜碟瓣和双叶瓣跨瓣压差均小于20mmHg，斜碟瓣的有效开口面积为1．5～2．1cm^2，双叶瓣为2．4～3．2cm^2，但它的返流百分比相对来说比较大。分析结果与通过试验装置进行测试的结果相一致，证实这种研究方法的可行性，可以为研制和开发新型人工机械心脏瓣膜提供一种实用工具。
Test methods on the hemodynamics of artificial mechanical heart valve mostly done by experimental devices at present. In view of the different results because of different experimental devices, using COSMOSFloWorks, which is plugged in Solid Works software, according to the International Standard ISO5840-2005, test the hemodynamics of four artificial mechanical heart valves by doing simulated experiments. The transvalvular pressure drops of caged ball valve and caged disc valve are more than 40mmHg, their effective orifice areas are about l cm^2; the transvalvular pressure drops of tilting disc valve and bileaflet valve are less than 20 mmHg, effective orifice areas of tilting disc valve are 1.5-2. l cm^2, bileaflet valve 2.4-3.2 cm^2, but its percentage of regurgitation is relatively large .Analysis results of artificial mechanical heart valves consistent with the results coming from experimental devices, proving the feasibility of the method, providing a practical tool to develop newly artificial mechanical heart valve.
出处
《机械》
2008年第8期33-35,共3页
Machinery
基金
四川省2007年应用技术研究与开发项目(2007SGY053)
