Effects of residual stenosis on carotid artery after stent implantation: A numerical study

Medicine in Novel Technology and Devices

Yingying Zhang¹  Nan Zhang²  Xiao Liu³  Xia Ye⁴  Lijun Dong⁵  Zhenmin Fan⁵  Xiaoyan Deng⁵ 

[1] Corresponding author. School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China.;Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, 100176, China;Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China;Radiologic Department, Beijing Anzhen Hospital, Capital Medical University, Beijing, 100029, China;School of Mechanical Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, 213001, China;

关键词: Residual stenosis;    Stent;    Carotid artery;    Hemodynamics;    Numerical study;   

DOI  :  

来源: DOAJ

【 摘 要 】

Stent deployments with residual stenosis (RS) were linked to increased risk of in-stent restenosis and thrombosis. The objective of the present work was to explore the underlying biomechanical mechanism(s) for adverse events with RS. The patient-specific carotid models with RS were constructed to investigate wall shear stress (WSS), velocity, relative residence time (RRT), and oscillating shear index (OSI) after stenting in the host artery. The results showed that stented artery accompanied by RS would result in evident vortex, stagnation and recirculation zone at the stenosis throat, where relatively more areas were at abnormal low level of TAWSS, high level of RRT and OSI. Moreover, effects of stenting with RS on velocity, WSS, RRT and OSI in host artery would be significantly enhanced by severe RS, long stent and common carotid artery (CCA) stenting. These results indicated that stenting with RS might aggravate adverse flow around the stent and the other region without stent, leading to increased adverse events in clinic. Therefore, to obtain better poststenting outcomes, stenting with RS requires caution and careful consideration, especially for the host artery with a severe RS, long stent and some locations of stenting.

【 授权许可】

Unknown