Numerical simulations of endovascualr balloon occlusion for cerebral aneurysms

摘要

We investigated how hardness of the material insde a balloon used for endovascular occlusion to treat cerebral aneurysm. This study was motivated by the fact that the balloon occlusion employing HEMA (2-hydroxyl ethylmethacrylate) can lead to further growth of aneurysm in many cases. We showed distribution of stresses acting on the crebral aneurysm wall by means of a dynamic finite element method (FEM). We used a 2-dimensional finite element model assuming the convetional type of cerebral aneurysm. Our simulation results indicated that the optimal Young's modulus of the material nside the balloon is about 100 kPa, which is much lower than that of HEMA. We believe that our and provide a proper value of the Young's modulus of the inside materia.