Influence of vascular morphology on hemodynamic changes after flow diverter placement in saccular intracranial aneurysms

I. LARRABIDE; A. J. GEERS; M. L. AGUILAR; H. MORALES; D. RUFENACHT; A. F. FRANGI

Nice

Workshop; Stenting Workshop 2012, MICCAI 2012, October, Nice, France; 2012

Flow diverter stents (FDs) are becoming widely used for the treatment of intracranial aneurysms, particularly for cases that present diculties for other treatments such as coiling or clipping. The relationship between the surrounding vascular morphology and the eect of these devices on the changes of hemodynamic forces in the aneurysm, which has not been assessed so far, is studied in this paper. The Vascular Modeling Toolkit (VMTK) has been used for the characterization of vascular morphology. CFD simulations have been performed on untreated and virtually treated geometries of 16 saccular intracranial aneurysms. Our results indicate that distance of the aneurysm with respect to the previous curvature peak of the vessel and the angle of the aneurysm with respect to the parent vessel osculating plane are closely related to the changes of hemodynamic variables inside the aneurysm after placement of a FD.