TY - EJOU AU - Zhao, Zhenxin AU - Chen, Tong AU - Liu, Xudong AU - Wang, Shengzhang AU - Lu, Haiyan TI - Numerical Investigation of an Idealized Total Cavopulmonary Connection Physiology Assisted by the Axial Blood Pump With and Without Diffuser T2 - Computer Modeling in Engineering \& Sciences PY - 2020 VL - 125 IS - 3 SN - 1526-1506 AB - In order to improve the surgical treatment of the congenital heart disease patient with single ventricle defect, two axial flow blood pumps, one with diffuser and the other without diffuser, were designed and virtually implanted into an idealized total cavopulmonary connection (TCPC) model to form two types of Pump-TCPC physiological structure. Computational fluid dynamics (CFD) simulations were performed to analyze the variations of the hemodynamic characteristics, such as flow field, wall shear stress (WSS), oscillatory shear index (OSI), relative residence time (RRT), between the two Pump-TCPC models. Numerical results indicate that the Pump-TCPC with diffuser has better flow field stability, less damage on endothelial cell of vessel wall, and lower risk of vascular injury and thrombosis formation than that without diffuser. KW - Computational fluid dynamics; total cavopulmonary connection; axial flow blood pump; vascular damage; thrombosis probability DO - 10.32604/cmes.2020.013702