论文部分内容阅读
目的评估脑动脉瘤植入支架前后的血流场血流动力学特征,为患者提供可行治疗方案。方法根据CT影像数据和逆向工程等软件建立脑动脉瘤三维实体模型,设计个体化血管内支架模型并植入脑动脉瘤,进行双向流固耦合分析。结果获取支架植入前后脑动脉瘤模型血流速度矢量、流线,动脉瘤壁面剪切力、压力和变形分布图。结论相同工况下,支架植入后脑动脉瘤内主要血流动力学参数均较植入前明显降低,尤其是壁面剪切力对脑动脉瘤壁的影响,可用于分析脑动脉瘤破裂机制,为临床治疗方案选择提供依据。
Objective To evaluate the hemodynamic characteristics of blood flow before and after cerebral aneurysm implantation in scaffolds and to provide feasible treatment for patients. Methods Three-dimensional solid models of cerebral aneurysms were established based on CT image data and reverse engineering software. Individualized endovascular stents were designed and implanted into cerebral aneurysms for bi-directional fluid-structure interaction analysis. Results The blood flow velocity vector, streamline, wall shear force, pressure and deformation distribution of cerebral aneurysm model before and after stent implantation were obtained. Conclusions Under the same conditions, the major hemodynamic parameters of cerebral aneurysms after stent implantation are significantly lower than those before implantation, especially the influence of wall shear force on the wall of cerebral aneurysm. It can be used to analyze the rupture mechanism of cerebral aneurysms, Provide the basis for clinical treatment options.