Effects of blood flow characteristics on rupture of cerebral aneurysm: Computational study

Xiao-Yong Shen, M. Barzegar Gerdroodbary, Amin Poozesh, Amir Musa Abazari and S. Misagh Imani
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Xiao-Yong Shen: Department of Radiation Medicine, Huzhou Central Hospital, Zhejiang Huzhou 313000, P. R. China
M. Barzegar Gerdroodbary: ��Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
Amin Poozesh: ��Center of Excellence for Design and Simulation of Space Systems, Faculty of Aerospace Engineering, K.N. Toosi University of Technology, Tehran, Iran
Amir Musa Abazari: �Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
S. Misagh Imani: ��Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran

International Journal of Modern Physics C (IJMPC), 2021, vol. 32, issue 11, 1-18

Abstract: In recent decades, cardiovascular disease and stroke are recognized as the most important reason for the high death rate. Irregular bloodstream and the circulatory system are the main reason for this issue. In this paper, Computational Fluid dynamic method is employed to study the impacts of the flow pattern inside the cerebral aneurysm for detection of the hemorrhage of the aneurysm. To achieve a reliable outcome, blood flow is considered as a non-Newtonian fluid with a power-law model. In this study, the influence of the blood viscosity and velocity on the pressure distribution and average wall shear stress (AWSS) are comprehensively studied. Moreover, the flow pattern inside the aneurysm is investigated to obtain the high-risk regions for the rupture of the aneurysm. Our results indicate that the wall shear stress (WSS) increases with increasing blood flow velocity. Furthermore, the risk of aneurysm rupture is considerably increased when the AWSS increases more than 0.6. Indeed, the blood flow with high viscosity expands the high-risk region on the wall of the aneurysm. Blood flow indicates that the angle of the incoming bloodstream is substantially effective in the high-risk region on the aneurysm wall. The augmentation of the blood velocity and vortices considerably increases the risk of hemorrhage of the aneurysm.

Keywords: Cerebral aneurysm; CFD; WSS; blood stream; cardiovascular disease (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0129183121501436

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