冠脉支架的长度缩短率和狗骨头率分析_谢冀江.pdf

16 1 Vol. 16 No. 1 2008 1 Opt ics and Precision Engineering Jan. 2008 100 -92 X( 2008) 01-0087-05 1 1, 2 谢冀江 , 祁 磊 ( 1. 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033; 2. 中国科学院研究生院, 北京1000 9) : , ANSYS , 10. 9% , 2. 57% , 0. 3% 1. 32% , , , : 冠脉支架; 有限元分析; 膨胀 : R5 3. 3; TH 122 :A Study on shortage ratio and dogboning ratio of coronary stent 1 1, 2 XIE J-i jiang , QI Lei ( 1. Changchun Institute of Op tics, Fine Mechanics and Physics, Chinese A cademy of Sciences, Changchun 130033, China; 2. Graduate School of the Chinese A cademy of Sciences, eij ing 1000 9, China) Abstract: T he shortage ratio and dogboning ratio of a new style stent after expanding w ere calculated to determine w hether the structure w as reasonable. The expansion process of the unrestricted stent w as simulated by Finite Element Analysis( FEA) softw are ANSYS, and the technology for stent ex- pansion from its initial status, including geometry modeling, material selection, meshing, boundary conditions and load definition w as studied w ithout considering artery and plaque. The shortage ratio and dogboning ratio of stent calculated by FEA are 10. 9% and 2. 57% , respectively. To validate the simulation, an expasion experiment of a real stent w as done, and the experimental results proved that the errors betw een the real expansion results and the FEA results are 0. 3% and 1. 32%, respectively. The results show that the expanded stent is uniformity and the structure design is reasonable, and u- sing FEA to simulate the coronary stent expansion is feasible, w hich is advantageous to the design and the app