Abstract:Objective:To study the effect of plaque eccentricity on the stent performance and stress distributions of artery and plaque during implantation process of stent in stenotic vessels. Method:Solid Works software was used to construct the stent and idealized stenotic vessels, and attached 4 different eccentricities (0%, 20%, 40%, 60%) to the plaque. Then finite element method was used to analyze the stent recoil,stent foreshortening, and stress distributions of artery and plaque when the stent was expanded to the target displacement. Result:Along with the increase of plaque eccentricity, both stent recoil and stent foreshortening gradually grew. At the same time, the stress of artery and plaque also showed an increasing tread, and high-stress areas gradually approached the narrow side. The maximum von Mises stress of the plaque was much greater than that of the artery. Conclusions:Plaque eccentricity had a certain effect on the performance of the stent and the stress distribution of stenotic vessels. In the design of the stent, the geometry of the plaque should be considered to improve the clinical effect of the stent in interventional treatment.