Two-Dimensional Computational Simulation of Bypassed Aortic Dissection with a Blind False Lumen

Abstract

In order to investigate the validity of bypassing treatment for aortic dissection, two-dimensional idealized geometry models of DeBakey III aortic dissection and its bypassing treatment were constructed. Computational simulations of physiological blood flow in these models were performed with the software of ANSYS using finite element method. After bypassing treatment, the blood flow velocity and the pressure in the false lumen of aortic dissection are both less than those before the operation. Bypassing can effectively reduce the pressure of aortic arch and ease the impulsion and stress of blood flow on the pathological dissection. Bypassing is an prospective surgical approach for the treatment of DeBakey III aortic dissection.

A Perspective Review on Numerical Simulations of Hemodynamics in Aortic Dissection

“…Surgical thromboexclusion involves bypassing the dissected aorta and creating flow reversal in the dissected segment [ 41 , 54 ]. Researchers from Beijing University of Technology [ 55 – 57 ] performed numerical simulation on idealized 2D geometric models for type B aortic dissection to investigate the effect of bypass graft on pressure and flow patterns. Bypass graft operation has been shown to reduce pressure and blood flow activities in the false lumen, and this is believed to alleviate the propagation of aortic dissection and promote thromboexclusion in the dissecting channel.…”