Influence of sac centerline of cerebral aneurysm on the hemodynamic factors for hemorrhage risk evaluation: Computational investigation

The influence of the abdominal aorta specifications has been investigated by the hemodynamic study of the bloodstream inside the different patients with saccular aneurysms. In this paper, the technique of computational fluid dynamics is used for the modeling of the non-Newtonian pulsatile blood flow through different ICA aneurysms with different sizes of sac centerline length, Real shapes of aneurysm are used to investigate the hemodynamic factors of wall shear stress, pressure and OSI distribution over the surface of the aneurysms at different stages of cardiac cycle. This study investigates how sac centerline and aneurysm size influence hemodynamic parameters (WSS, OSI, pressure) across cardiac cycles, offering novel insights for hemorrhage risk stratification in differently sized aneurysms. The velocity distribution at the ostium section for the selected patients is also presented to disclose the role of this factor on the hemodynamic factors related to the rupture of the aneurysms. A comparison of the hemodynamic factors for different sizes of sac centerline length indicates that there is no connection between wall shear stress and OSI in different sac centerline lengths.