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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

Computational Investigation of Magneto-Hydrodynamic Assist Device for Actively Powered Fontan Circulations

Get access pages 583-594
DOI: 10.1615/TFEC2021.bio.036779

摘要

Around 8% of all newborns with a Congenital Heart Defect (CHD) have a single ventricle (SV) anatomy. Affected children must undergo three palliative surgeries to establish viable SV physiology. The Fontan circulation is the result of the third surgery. Despite successful implementation over the years, the Fontan circulation is prone to failure with survival rates of less than 50%. One of the failure modes is increased inferior vena cava (IVC) pressure. We propose a novel solution by implementing a magneto-hydrodynamic assist device (MhAD) to increase pulmonary blood flow while decreasing the IVC pressure. This design is conceptually attractive because of the absence of moving parts potentially obtrusive to the bloodstream; hence it may reduce incidences of morbidity and may serve as a true percutaneous implant. Following ongoing analysis, we report preliminary results using a patient-generic geometry implementing multi-physics modeling under incompressible steady-flow conditions. A computational fluid dynamics (CFD) model has been setup by placing the MhAD on the inferior vena cava (IVC) with clinically relevant mass flow rates and static pressures as inlet and outlet boundary conditions. Our calculations show that by varying the applied magnetic and electric field, the MhAD generates enough Lorentz force to create an appreciable increase in the blood flow across the IVC. These findings suggest that model parameters such as field strength, voltage, hemodynamic properties, and geometry of the device will affect the efficacy of the MhAD, hence requiring tailored optimization.
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