Uncertainty of Boundary Conditions and Material Model for Pre-Operative Simulations: Clinical Case of Rupture of a Fusiform Aneurysm of Cerebral Vessels
Yu. O. Kuyanova1, A. K. Khe1, K. S. Ovsyannikov2, A. V. Dubovoi2, A. P. Chupakhin1, D. V. Parshin1
1Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Federal Neurosurgical Center, Novosibirsk, Russia
Keywords: cerebral aneurysm, rupture zone, aneurysm status, initial data, computational hemodynamics, FSI simulation
Abstract
The influence of various individual and phantom boundary conditions on the results pre-operative numerical simulations of hemodynamics of a fusiform aneurysm of cerebral vessels is numerically simulated. It is found that allowance for individual mechanical properties of the aneurysm tissue affects the results of predicting the aneurysm status, but does not affect predicting the rupture zone, which can be detected by using the CFD approach under the assumption of rigid walls with phantom boundary conditions and with the condition of the maximum shear stresses on the wall as a criterion of rupture zone determination.
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