Effects of Plaque Eccentricity on Biodegradable Polylactic Acid Stent Implantantion in Stenotic Vessels
10.16156/j.1004-7220.2021.02.12
- VernacularTitle:斑块偏心率对可降解聚乳酸支架植入狭窄血管的影响
- Author:
Ting HE
1
;
Yunzhang CHENG
1
;
Chenzhao ZHANG
2
;
Guohui WANG
2
Author Information
1. Shanghai Engineering Research Center of Interventional Medical Devices, University of Shanghai for Science and Technology
2. Shanghai Stroke Care Technology Co., Ltd.
- Publication Type:Journal Article
- Keywords:
biodegradable stent;
plaque;
eccentricity
- From:
Journal of Medical Biomechanics
2021;36(2):E245-E250
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effect of plaque eccentricity on stent performance and stress distributions of artery and plaque during stent implantation in stenotic vessels. Methods The stent and idealized stenotic vessels were constructed, and 4 different eccentricities (0%, 20%, 40%, 60%) were attributed to the plaque. Then the stent recoil, stent foreshortening, and stress distributions of artery and plaque when the stent was expanded to the target displacement were analyzed by the finite element method. Results 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 performance of the stent and stress distributions of stenotic vessels. In stent design, the geometry of the plaque should be considered to improve clinical effect of the stent in interventional treatment.
