Simulation and analysis of blood flow in bypass grafts with a cuff

Abstract

In the paper the hemodynamics in the blood vessel and in the bypass graft is simulated and analyzed. A new construction of a bypass graft with a cuff is applied. The goal of the research is evaluation of influence of the ratio between the length and the height of the bypass graft cuff upon the structure of the blood flow and pathogenesis of the blood vessel. The results of the analysis indicate that blood flow velocity at a junction of the bypass graft and the blood vessel depends on the parameters of the cuff. The best results are obtained when the said ratio is 1.25 and 1.5 due to uneven distribution of pressure in the cuff. Choosing such parameters of a bypass cuff ensures better hemodynamics and absence of haemostasia, thus reducing a risk of formation of thrombi in the bypass graft and the blood vessel.