Virtual surgery of y-configurated dual intracranial stent-assisted coil embolization for the treatment of wide-necked basilar tip aneurysm

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. Some medical studies have reported many kinds of stents configuration in artery aneurysm. However, it is still unclear which configuration of stents is optimal for surgery. To verify the efficiency of flow reduction effect between different pattern of stents configuration, we placed stents virtually in brain aneurysm and analyzed fluid dynamics. In this study, we present the process of constructing 3D flow diverter stent from helix curve and a method for fitting them to patient specific vasculature wall. Aneurysmal fluid dynamics for three different configurations (half-Y, Y and cross-bar) by computational fluid dynamics (CFD) are carried in two kinds of commercially available stents in patient specific vessel model.