Paper Title
Computational Fem Model of Aorta Generated From Computed Tomography Images for In-Silico Test of A Cerebral Protection Capture Device

Abstract
Aortic stenosis is the most common valvulopathy in developed countries, for years the main cause was rheumatic fever, however due to the increase in life expectancy, degenerative stenosis is now the leading cause. This condition develops from the hardening of the valvular tissue by aging and calcification. Transcatheter aortic valve implantation is a procedure that was performed for the first time in 2002, and has had a rapid development since then., nonetheless this procedure has risk factors within, one of them the possibility of stroke due to the released debris. In order to solve this problem, some distal protection devices have been designed, these devices partially capture or deflect the material during the procedure. This article presents a computational model for a total protection device, in order to achieve this two computational models of the aorta are shown, in one the hemodynamics inside the aorta is simulated, and in the second a capture device for brain protection designed to cover the entire aorta, in order to capture debris and protect all the supra-aortic trunks, is included in the hemodynamics simulation. Finite element method was used to obtain the results. The speed showed a reduction of 30% when the devices was included in the simulation, the pressure had a generalized reduction of 1mmHg and the maximum pressure was 120.43mmHg showing concentration in the proximal ascending aorta. Also, vorticity and shear stress were analyzed, the vortices were reduced as well as shear stress in the arterial wall, however concentration of shear stress was presented in the frame of the device.Based on the results of the studies carried out, it is concluded that the manufacture of a protection device to cover the totality of the aorta is feasible, nevertheless it is still necessary to perform more studies with different prototypes looking for better efficiency, as well as with different pressure curve and heart rate in order to observe the results in different operating conditions. Keywords - TAVI, FEM, Stenosis, Cerebral Protection Device