[支架植入后血管扭转对支架力学状态的影响]
[The Effect of Torsion of Blood Vessel after Stent Implantation on Mechanical State of Stent].
作者信息
Yu Long, Wan Jun, Qin Wang, Wang Shengzhang
机构信息
Institute of Biomechanics, Department of Aeronautics and Astronautics, Fudan University, Shanghai, 200433.
Academy for Engineering & Technology, Fudan University, Shanghai, 200433.
出版信息
Zhongguo Yi Liao Qi Xie Za Zhi. 2022 Jul 30;46(4):388-394. doi: 10.3969/j.issn.1671-7104.2022.04.008.
OBJECTIVE
In daily life, the movement of the neck will cause certain deformation of the blood vessel and the stent. This study explores the quantitative influence of the torsion deformation of the blood vessel on the mechanical properties of the stent.
METHODS
In the finite element simulation software Abaqus, the numerical simulation of the crimping and releasing process of the stent, the numerical simulation of the torsion process of the blood vessel with the stent, and the numerical simulation of the pressure loading process of the outer wall of the blood vessel were carried out.
RESULTS
After the stent was implanted, when a load was applied to the outer surface of the blood vessel wall, when the applied load did not change, as the torsion angle increased, the smallest cross-sectional area in the blood vessel decreased.
CONCLUSIONS
After the stent is placed, when the external load is fixed, the radial support capacity of the stent will decrease as the torsion angle increases.
目的
在日常生活中，颈部的运动会导致血管和支架产生一定的变形。本研究探讨血管扭转变形对支架力学性能的定量影响。
方法
在有限元模拟软件Abaqus中，进行了支架的压握和释放过程的数值模拟、血管与支架一起扭转过程的数值模拟以及血管外壁压力加载过程的数值模拟。
结果
支架植入后，当对血管壁外表面施加载荷时，在施加的载荷不变的情况下，随着扭转角度增加，血管内最小横截面积减小。
结论
支架置入后，当外部载荷固定时，支架的径向支撑能力会随着扭转角度的增加而降低。
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