Simulation and research on the influence of the shape and the geometrical parameters of a blood vessel bypass graft upon hemodynamics

In the Paper, models of a bypass graft with a cylindrical and conical cuff and a model of a blood vessel that enable investigating the influence of various geometrical parameters of the cuff upon hemodynamics were developed. Simulation of blood flow and blood pressure in a bypass graft was performed upon applying ANSYS program package based on the finite element method. The influence of the geometrical parameters of a bypass graft with a cuff of different shapes upon the structure of blood flow and development of pathogenesis of the blood vessel was found. It was also found that the best results are obtained when the cuff of the bypass graft is cylindrical and the ratio of the diameter and the height of the cuff is 1.25 and 1.5. If a cuff with such parameters is chosen, hemodynamics will be improved and haemostasia will be avoided, thus reducing a risk of appearance of thrombi in the bypass graft and the blood vessel as well as IH formation and extending the period of bypass patency