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The effect of mesh design in cerebral aneurysm hemodynamics for developing flow controllable stent: Computational fluid dynamics study

机译:脑动脉瘤血流动力学对脑动脉瘤血流动力学的影响:计算流体动力学研究

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Computer based simulation is important for clarifying the hemodynamics in brain aneurysm. Specifically, for endovascular treatments, the effect of indwelling intravascular devices on blood stream needs to be considered. Most recent technology for cerebral aneurysm treatment is related with the use of flow diverters to reduce the amount of flow entering to the aneurysms. In this research, we present a new method for design of flow diverters and fitting them to patient specific vasculature models. This methodology enables to change porosity of the flow diverters as well as their location in the blood vessel. One coiling assist stent and two flow diverters were compared to estimate the effect of flow alteration in aneurysm for treatment of a cerebral aneurysm. From the numerical result, we can conclude that pore density and size of mesh affect the hemodynamics in aneurysm and high density and small size of pore produce reduction effect of pressure and wall shear stress on an aneurysm.
机译:基于计算机的模拟对于阐明脑动脉瘤中的血流动力学非常重要。 具体地,对于血管内治疗,需要考虑饲养血管内装置对血流的影响。 最近用于脑动脉瘤治疗技术与流动分流器的使用有关,以减少进入动脉瘤的流量。 在这项研究中,我们提出了一种设计流动分流器的新方法,并将其装配给患者特定血管系统模型。 该方法能够改变流动分流器的孔隙率以及它们在血管中的位置。 比较一个卷绕辅助支架和两个流动分流器,以估计动脉瘤的流动变化对脑动脉瘤的影响。 从数值结果中,我们可以得出结论,孔隙密度和筛网的大小影响动脉瘤中的血流动力学,高密度和小尺寸的孔隙产生压力和壁剪切应力对动脉瘤的降低效果。

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