Hemodynamics analysis of vertebral artery ostium stenosis treated with stent implantation undergoing different protrusion distances
- VernacularTitle:支架置入椎动脉开口处狭窄后突出距离的血流动力学分析
- Author:
Jing NIU
1
;
Xuan DAI
2
;
Ai-ke QIAO
1
;
Li-qun JIAO
1
Author Information
1. The College of Life Science and Bioengineering, Beijing University of Technology
2. Xuan Wu Hospital affiliated to Capital Medical University
- Publication Type:Journal Article
- Keywords:
Arterial stenosis;
Endovascular stent;
Hemodynamics;
Computational fluid dynamics
- From:
Journal of Medical Biomechanics
2012;27(6):E598-E602
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the influence of different protrusion distance of stent strut into the subclavian artery on local hemodynamics of the vertebral artery (VA) ostium.Methods Five models of the VA were established. Model 1 was without stent implantation, Model 2 to 5 was with stent protruding into the subclavian artery for 0, 1, 2, 3 mm, respectively. Computational fluid dynamics analysis was performed to study the differences of hemodynamics in these models. Results After stent implantation, the wall shear stress and the blood flow velocity at the stent segment in the Model 2 was reduced by 85.33% and 35.36%, respectively. The phenomenon of swirling flow disappeared. For models with different protrusion distance, the maximum difference of wall shear stress of VA was 0.76%, and the maximum difference of blood flow velocity is 0.45%. ConclusionsStent implantation can improve the hemodynamics of vertebral artery ostium stenosis, while the protrusion distance of stent strut has no obvious influence on the blood flow velocity and wall shear stress.
