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目的利用计算机模拟颅内动脉瘤及其载瘤动脉的血液流动,并对宽、窄颈动脉瘤进行血流动力学分析。方法选取颈内-后交通动脉瘤中典型宽、窄颈动脉瘤患者的全脑血管造影(DSA)图像,联合应用Photoshop、Matlab、Ansys以及Fluent软件,对动脉瘤进行血液动力学的计算机模拟。结果成功模拟出在一个完整的心动周期中动脉瘤及其载瘤动脉内血流的动态变化。宽颈动脉瘤内可见涡流现象,流速在0．057～0．156 m／s。窄颈动脉瘤内无涡流现象,流速在0．001～0．014 m／S。结论宽颈动脉瘤与窄颈动脉瘤在血流动力学方面存在明显差异,提示在动脉瘤介入治疗中,应先设法降低动脉瘤中涡流的流速或使涡流消失后,再进行栓塞治疗。
Objective To simulate the blood flow of intracranial aneurysms and its parental artery by computer and analyze the hemodynamics of wide and narrow neck aneurysms. Methods Whole brain angiography (DSA) images of patients with typical wide and narrow neck aneurysms in the internal carotid artery and posterior communicating aneurysms were selected and combined with computer software of Photoshop, Matlab, Ansys and Fluent software to simulate the hemodynamics of the aneurysms. Results The dynamic changes of aneurysm and its parent artery in a complete cardiac cycle were simulated successfully. Vorticity can be seen in wide-necked aneurysms at a flow rate between 0.057 and 0.156 m / s. There was no vortex in narrow-necked aneurysms, and the flow rate was 0.001 ~ 0.014 m / S. Conclusion There are significant differences in hemodynamics between wide-necked aneurysms and narrow-necked aneurysms, suggesting that in the interventional treatment of aneurysms, we should try to reduce the velocity of eddy currents in aneurysms or vortex to disappear before embolization.