摘要
血管内支架作为治疗心血管疾病临床应用中重要的医疗器械,其主要变形过程是支架在血管中的膨胀过程。这个重要的变形特征对应并影响着支架不同的两个力学技术指标:变形与应力。所以本研究的主要目的就是研制和开发具有自主知识产权的血管内支架产品,并利用有限元技术对NiTi自扩张血管内支架的结构进行优化设计。利用有限元分析软件ANSYS建立了以NiTi形状记忆合金为材料模型的血管支架的三维有限元仿真模型。结合支架外形尺度、网格形状等其它影响因素,对支架在血管中的自膨胀过程进行了数值模拟分析。通过对比两种具有类似网格结构支架的性能,提出血管支架"最优化网格"的概念。
Vascular stent is an important medical appliance for angiocardiopathy. Its key deformation process is the expandable progress of stent in the vessel. The important deformation behaviour corresponds to two mechanics targets： deformation and stress. This paper is devoted to the research and development of vascular stent with proprietary intellectual property rights. The design of NiTinol self-expandable stent is optimized by means of finite element software. ANSYS is used to build the finite element simulation model of vascular stent; the molding material is NiTinol shape memory alloy. To cope with the factors that affect the structure of stent, the shape of grid and so on, the self-expanding process of Nitinol stent is simulated through computer. By making a comparison between two kinds of stents with similar grid structure, we present a new concept of ＂Optimized Grid＂ of stent.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2008年第5期1101-1106,共6页
Journal of Biomedical Engineering
基金
国家自然科学基金资助项目(10572155)
广东省科技厅高新项目基金资助项目(2004B10401005)
关键词
有限元
镍钛形状记忆合金
支架
数值模拟
Finite element NiTi shape memory alloy Stent Numerical simulation
