Analysis of the elastic stress for the bifurcated region of blood vessel

摘要

In recent years, application of biomechanical modeling techniques in the area of medical image analysis and surgical simulation is a commonly method. In the development of medical surgery robot technology, haptic and virtual reality systems also have attended consideration on simulators as a tool of medical training. In order to enhance the authenticity of our vascular interventional surgery and improve the safety of operation, we intend to simulate the blood flow in the blood vessels, to create a certain operating environment for our operating system. The purpose of this study was to investigate the hemodynamic effect of different initial flow velocity of the blood in the vessel. In this paper, we have established a three-dimensional model of blood vessels, a Fluid Solid Interaction analysis of the reconstructed vascular model was performed. The vascular wall was modeled as an isotropic material. In order to investigate the correlation between flow-induced wall shear stress and geometry of the vessel, the vascular wall shear stress was computed. The velocity flow pattern and elastic stress were also measured. Results showed that blood flow velocity was found to reduce when the flow changed from the main stem to the bifurcated region. The high wall shear stress values calculated at the apex of the bifurcation indicated that this location is predisposed to form thrombus. Understand the changes of blood flow velocity and pressure in the local blood vessels, provides an important reference for the treatment of vascular disease.