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Hemodynamic effects from coil distribution with realistic coil models in an aneurysm.
Because of its minimal invasiveness, coil embolization has become a popular way to treat aneurysms. The main problem with this method, however, is the poor understanding of the hemodynamics in the aneurysm after coil embolization. To improve this situation, we used a finite element method and computational fluid dynamics to investigate how hemodynamic parameters depend on the spatial distribution of coils. A basic model of an internal carotid artery aneurysm was created, and six realistic coil models were considered for the coil geometry. The material properties of the coils were based on the commercially available embolic coil Target 360 series. The results showed that the reduction in blood velocity in aneurysms was closely related to coil distribution. In addition, the coil volume in the neck region and the density of coils near the aneurysmal wall were further important factors for reducing the velocity. Considering the coil distribution may help to prevent aneurysmal recanalization.
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