To investigate the influence of bypassing treatment on the hemodynamic parameters of aortic dissection and the feasibility of this therapeutic approach in clinical application, idealized three-dimensional geometric models of DeBakey III aortic dissection with a blind lumen and its bypassing treatment were constructed with the software of SolidWorks 2007. Then, numerical simulation was performed utilizing the software of ANSYS 11.0, and the results were analyzed. The velocity of blood flow and the pressure at the entrance area of false lumen and in the false lumen are both less than those before the operation. Bypassing is an effective surgery for the treatment of DeBakey III dissection. It can effectively reduce the pressure of aortic arch and ease the impulsion and stress of blood flow on the pathological dissection. It can also alleviate the propagation, prevent the rupture, and promote the healing of dissection.

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.

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