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脑前交通动脉是动脉瘤高发且易破裂的区域,其所处的多血管交汇位置使瘤内流场易受周边血流环境的影响。该文以理想化的动脉瘤模型为研究对象,采用CFD方法开展数值实验,考察了模型出口边界条件对瘤内血流参数的影响。结果表明,瘤内流场的结构特征、壁面剪切力等均随模型子管间流量分配比的改变而变化,同时,各参数的受影响程度与所处位置有关。虽然单一模型分析限制了该文研究结论的统计学意义,但研究结果明确了瘤内流场对边界条件的敏感性,提示在脑前交通动脉瘤的血流分析和风险评估中充分考虑脑动脉网络结构及系统血流环境的必要性。
Anterior communicating artery is a high incidence of aneurysm and rupture of the region, where the intersection of the location of the multi-vascular flow within the tumor is susceptible to peripheral blood flow environment. In this paper, the idealized aneurysm model was chosen as the research object. The CFD method was used to carry out numerical experiments. The influence of the boundary conditions on the in-blood flow parameters was investigated. The results show that the structural characteristics of the flow field in the tumor and the wall shear force all change with the distribution ratio of the flow rate in the model tube. At the same time, the influence degree of each parameter is related to the location. Although the single-model analysis limits the statistical significance of the conclusions of this study, the results confirm the sensitivity of the in-flow field to the boundary conditions and suggest that cerebral arteries should be fully considered in the blood flow analysis and risk assessment of the anterior communicating artery aneurysm Necessity of network structure and system blood flow environment.