颅内动脉瘤夹闭手术的数值模拟与临床应用研究

Numerical Simulation and Clinical Application of Intracranial Aneurysma Enclosure Surgery

本文使用计算流体力学(CFD)的方法对颅内动脉瘤夹闭手术前后以及正常血管进行数值模拟。通过使用Mimics、3-matic对CT数据进行重建,再使用Ansys进行网格划分、求解计算,获得模拟夹闭手术前后的心动周期不同时刻的血流速度、壁切应力、壁压力数值。数值模拟改变血流动力学的方式可以对动脉瘤治疗前及治疗后的状况进行评估。动脉瘤处的低壁切应力和低速区域与动脉瘤破裂有关。

Computational fluid mechanics(CFD) method was used to simulate intracranial aneurysms before and after operation and normal blood vessels. Through the reconstruction of CT data using Mimics and 3-matic, and then using Ansys for mesh division and calculation, the blood flow velocity, wall shear stress, and wall pressure values at different times of the cardiac cycle before and after the simulated clamping operation are obtained. Numerical simulations of changes in hemodynamics can assess the status of aneurysms before and after treatment. The low wall shear stress and the low velocity area at the aneurysm are related to the rupture of the aneurysm.