2011 Design of Medical Devices Conference Abstracts

A 2D Model With Fluid-Structure Interactions for Coarctated Arteries PUBLIC ACCESS

[+] Author and Article Information
Ying Han, Linxia Gu

University of Nebraska-Lincoln

J. Med. Devices 5(2), 027507 (Jun 09, 2011) (1 page) doi:10.1115/1.3589287 History: Published June 09, 2011; Online June 09, 2011

Arterial coarctation especially that occurs in aorta is an extremely significant health problem. Though it is a result of numerous factors, hemodynamics factors and biomechanical forces have been widely accepted as the key roles in its mechanism, development, and complication. In this study, a 2D model, which incorporates fluid-structure interaction (FSI), has been developed. We investigated the flow field and stress field for coarctation with different lengths and severities. The results show that the existence of coarctation will generate higher velocity at the coarctation region. The severity has great effect on the peak velocity while the length effect is slight. Coarctated vessels demonstrate less distensibility than health vessel by comparing the radial expansion displacement. The stress distribution also has significant variation among health vessel and the series of diseased vessels. The results from this investigation suggest that coarctation inhibit wall motion, resulting in higher blood velocities and higher peak wall stress than health vessel. These factors may contribute to further development and other complications.

Copyright © 2011 by American Society of Mechanical Engineers
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