描述血管支架力学性能的新概念──形状系数  

Shape Coefficient—A New Concept to Describe the Vascular Stent Mechanical Property

作　　者：杨杰[1] 黄楠[2] 杜全兴[2] 张勇[2] 陈虬[1] 

机构地区：[1]西南交通大学应用力学与工程系,成都610031 [2]西南交通大学材料科学与工程学院,成都610031

出　　处：《生物医学工程学杂志》2006年第1期74-77,共4页Journal of Biomedical Engineering

基　　金：国家重点基础研究规划项目(973)(2005CB623904);国家自然科学基金资助项目(30318006);西南交通大学校基金资助项目

摘　　要：提出了血管支架形状系数概念,用以描述形状的力学性能。基于弯曲梁的塑性理论,建立了两种血管支架扩展力形状系数。在考虑材料和血管支架半径相同的情况下,进一步得到了一个简单形式的形状系数。计算结果和实验都显示,血管支架存在极限载荷;不同宽度、厚度的血管支架,只要它们的形状一样,则它们具有相同的形状系数。这揭示了形状系数概念的意义,验证了公式的正确性。In this paper, we advance a concept, shape coefficient, to describe the mechanical properties of shape factor concretely. Two sorts of shape coefficient are deduced from the plastic theory of bending beam. Under conditions of the same material and radius,a simple form of shape coefficient is acquired. The relevant computing results and experiment show that the limit load of vascular stent exists,and vascular stents in different widththickness have the same shape coefficient so long as they are the same shape. These reveal the significance of the concept of shape coefficient and verify the correctness of the formula.

关 键 词：血管支架 形状系数 极限载荷 

分 类 号：R318.01[医药卫生—生物医学工程]