Numerical Simulation Of Interventional Treatment Of Wide Necked Aneurysms Based On Reverse Engineering

The clinical practice of narrow necked aneurysms has been relatively mature,but the clinical experience of the relatively complicated carotid aneurysms is very little.Stent implantation alone sometimes fails to achieve an ideal clinical outcome,and stent assisted embolization is needed for treatment.In order to study the treatment of different wide necked aneurysms,the effects of stent implantation and stent assisted embolization in the treatment of these complicated intracranial aneurysms were verified.Two wide necked aneurysms with lateral wall and bifurcation were studied.To explore the hemodynamic parameters of the two kinds of aneurysms before and after interventional therapy and to explore the influencing factors of this difference.A three-dimensional solid model of lateral wall aneurysms and bifurcation aneurysms was extracted by reverse engineering.In two cases with wide necked aneurysms enter the same entrance flow velocity(0.2m/s),through the finite element analysis software to simulate and analyze their respective hemodynamic parameters;the side wall aneurysm stent implantation and numerical simulation analysis of the same set entrance speed,the hemodynamic parameters,found that the effect is not very ideal;then on the aneurysm the internal stent embolization was performed based on the same set of boundary conditions for numerical simulation and analysis of re bleeding flow mechanics parameters.Stenting side wall aneurysm after the maximum wall shear stress increased from 50.17 Pa to 32.72 Pa,the blood flow velocity decreases from 0.98m/s to 0.59m/s,decreased to a certain extent,but the effect is not ideal,after stent assisted embolization of maximum wall shear stress is 10.45 Pa,the speed dropped to 0.32m/s,the effect is significant,description of stent assisted embolization of sidewall aneurysm has a good effect.Finally,the Y stent was analyzed by numerical simulation,and the same boundary conditions were simulated,and the hemodynamic parameters of the stent were obtained.The bifurcation aneurysm after stent implantation in Y type maximum wall shear stress decreased from 197.8Pa to 67.9Pa of the original,the maximum speed dropped from 0.58m/s to 0.21m/s was obviously decreased,indicating the simple implantation of Y stent has good curative effect for the treatment of the bifurcation aneurysms.