柔顺性是冠脉支架很重要的一个力学性能，它决定了支架的输送性及血管内支架的适应性。利用有限元法对6种不同结构的镁合金冠状动脉支架进行模拟分析，主要研究其不同连接体结构对支架柔顺性能的影响。结果显示，在压握状态下，不同连接体结构对支架柔顺性能影响较大，其中 S 型支架柔顺性较好，直杆 L 型支架柔顺性较差；在扩张状态下，连接体和支撑体个数相同时主要取决于连接体的结构；无论是在压握状态还是扩张状态下，有圆弧形的连接体的支架柔顺性要优于直杆形连接体的支架。关于支架柔顺性能的模拟结果，为今后镁合金冠脉支架的结构优化设计和临床选择起到了指导作用。
Finite element method (FEM)was used for simulation analysis of 6 kinds of magnesium alloy with dif-ferent structure of coronary artery stent for simulation analysis.The purpose of this paper was to study and compare flexibility of different stents.Results showed that,in the profiling state,different connection bars of stents had big effect on their flexibility.The flexibility of S-stent was better,instead the L-stent was worse;in expansion,different connectors and axial supports of stent both had effect on flexibility of stent when the length of stents were equal,the number of axial support had a great impact;when the number of axial supports are e-qual,the structure of connectors play a role in the flexibility of stents.No matter in pressure state or in expan-sion,the stent whose structure of connectors are round-arc has better flexibility than that whose connectors were straight.The flexibility of coronary stents with different connection bars,provided scientific guidance for the design and development of the stent and interventional treatment.
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