生物可降解聚乳酸血管支架有限元分析  

Finite Element Analysis of Biodegradable Polylactic Acid Stent

作　　者：颜文涛 姚天平 

机构地区：[1]上海市医疗器械检测所,上海市201318

出　　处：《中国医疗器械杂志》2018年第1期14-17,共4页Chinese Journal of Medical Instrumentation

摘　　要：生物可降解血管支架作为第三代支架成为了最近研究的热点。该文利用有限元数值模拟的方法,对三种相同结构不同规格的支架,采用von Mises屈服准则和Goodman准则,对其压握、扩张以及疲劳安全性进行分析。结果表明,最大规格支架在压握、扩张和疲劳过程中均出现最大的应力,此规格最危险,同时也为支架的疲劳试验选择极限规格样品提供理论依据。Biodegradable vascular stent, also known as the third generation stent, has recently been widely studied. Finite element models of three stents with the same structure and different specifications were developed. The mechanical behavior under crimping, expanding and fatigue testing were assessed by von Mises yield and Goodman convergence. The maximum stress during crimping, expanding and fatigue testing were all observed in the stent with the largest size. The results indicated that the largest stent had the highest risk of failure and also provided theoretical evidence for the worst case scenario in the fatigue testing.

关 键 词：生物可降解 左旋聚乳酸 支架 有限元分析 

分 类 号：R318.08[医药卫生—生物医学工程]