Blood-Flow Study in Systemic-Pulmonary Shunt: Application of Non-Newtonian Model

M. Navidbakhsh and E. Khormali (Iran)

Keywords

systemic-to-pulmonary shunt, Casson’s model, HLHS

Abstract

A systemic-to-pulmonary shunt is a connection created between the systemic and pulmonary arterial circulations in order to improve pulmonary perfusion in children with congenital heart diseases (HLHS). Blood circulation revives by the shunt between vessels that reach lungs and upper limbs’ vessels. In this study diverse models of shunts with different angles and diameters were examined and hydrodynamic parameters have been compared. With respect to route shape, pressure drop, particular areas and shunt wall shear stress were studied and the following results derived: With increasing of shunt diameter, pressure drop along shunt length decreases and shear stress at bifurcation increases. Any curve in this model causes shear stress decrease and pressure drop. Curved shunt shares blood flow approximately equal in left and right pulmonary arteries.

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