بررسي تاثير كاشت استنت متخلخل در پيشگيري از رشد آئوريسم با استفاده از روش شبكه بولتزمن

Study of the implantation of a porous stent to prevent the further growth of the aneurism by lattice Boltzmann method

Recently, the implantation of a porous stent in the damaged vessel has been proposed as a way to prevent the further growth of the aneurism and its possible rupture. This techniques is viewed as a minimally invasive treatment and a very promising alternative or complement to more traditional approaches such as coils or surgery. The efficiency of a stent is related to several parameters which are not yet fully understood. The goal of this paper is to identify, through numerical simulations(lattice Boltzmann Method), how the stent structure and its positioning affect the hemodynamic properties of the blood flow inside the aneurism. An aneurism is a local and undesired deformation of a blood vessel which can be due to a pressure excess or a local weakness of the vessel wall. If the aneurism breaks, a lethal hemorrhage can occur. We consider the hemodynamic properties of the blood inside an aneurism. This question is of great importance in the case of the treatment of aneurisms by stents. We use the concept of flow reduction to characterize the stent efficiency. Our simulations are based on a lattice Boltzmann modeling of blood flow. Our results, which