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Abstract In order to clarify the influence of the sutureless anastomotic devices on hemodynamic factors in proximal anastomosis in coronary artery bypass graft (CABG), suturing and sutureless anastomotic models were constructed by software Solidworks. The pulsatile flows in the two models were simulated and analyzed with finite element method and software Fluent 6.3. The distribution of velocity, second flow, pressure and wall shear stress were calculated with a function of time in a cardiac cycle. Results showed that using the sutureless anastomotic devices enlarged the area of low velocity, which was 0.2 m/s higher than suturing model, while increased the magnitude of the velocity in grafts. The wall shear stress in anastomosis ranged from 0 to 50 Pa and changed dramatically, besides, stress concentration was more serious in sutureless anastomotic model, which would lead to the activation of the platelets and intimal hyperplasia. Optimal design of sutureless anastomotic devices is necessary for the improvement of CABG patency rates.
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