Stent effects on hemodynamics of cerebral aneurysm by non-uniform lattice Boltzmann method
10.3871/j.1004-7220.2015.02.104
- VernacularTitle:利用非均匀格Boltzmann方法研究支架对颅内动脉瘤血流动力学的影响
- Author:
Shuo-ran SUN
1
;
Chang-sheng HUANG
1
;
Lei WANG
1
;
Bao-chang SHI
1
Author Information
1. School of Mathematics and Statistics, Huazhong University of Science and Technology
- Publication Type:Journal Article
- Keywords:
Lattice Boltzmann method (LBM);
Non-uniform mesh;
Cerebral aneurysm;
Stent;
Hemodynamics
- From:
Journal of Medical Biomechanics
2015;30(2):E104-E110
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of triangle stents with different rotation angles on hemodynamics of cerebral aneurysms. Methods A non-uniform lattice Boltzmann method (LBM) was adopted to make local refinement on grids near the stent, and a scheme for the curved boundary conditions was used to numerically simulate the stented cerebral aneurysms. The stream plots of flows in the aneurysms, the velocity profiles at the aneurysm orifice and the velocity reduction were obtained and analyzed to evaluate the effects of stents with different rotation angles on treating cerebral aneurysms. Results With respect to velocity reduction, the best treatment effect was achieved in the triangle stent with rotation angle of 180°, while the triangle stent without any rotation caused the smallest velocity reduction. In addition，the dynamic differences were not obvious in triangle stents with different rotation angles at small porosities. Conclusions The non-uniform LBM combined with curved boundary conditions can be used to study hemodynamic characteristics of the cerebral aneurysm accurately, which provides reference for the design of such stent and also offers some guidance for intervention therapy in clinic.
