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《Beijing Biomedical Engineering》 2006-04
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Finite Element Analysis on the Crimped Mechanical Behavior of Coronary Stents

ZHANG Qingbao, WANG Weiqiang, QI Min, LIANG Dongke, YANG Dazhi.\ Department of Materials Engineering, Dalian University of Technology, Dalian, Liaoning Province\ 116024  
Coronary stent is an important device used in Percutaneous Transluminal Coronary Angioplasty (PTCA), which is usually implanted to support the stenosed artery. The retention of stent clinging to the balloon is a crucial factor to avoid the stent slipping off from the balloon during its delivery to the blockage. 316L stainless stent is widely used in clinic currently, however, Co-Cr alloy stent, with its unique properties, has obtained more and more attention. In this paper, the finite element method (FEM) was applied to systematically analyze the crimped mechanical behavior of coronary stents, which is influenced by the width and thickness of strut, the crimped scale of stents and stent materials used. The results show that radial recoil of stent after being crimped depends greatly on the material used. And the recoil of Co-Cr stent is about 40% larger than that of 316L stainless steel stent. In conclusion, FEM can quantify some mechanical behaviors of stent and help designers to optimize stent system.
【Fund】: 国家高技术研究发展863计划(2002AA326010)资助
【CateGory Index】: R318.01
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