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2D FSI determination of mechanical stresses on aneurismal walls

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 3rd International Conference on Biomedical Engineering and Biotechnology, 25–28 September 2014, Beijing, China

Article type: Research Article

Authors: Veshkina, Natalia | Zbicinski, Ireneusz; | Stefańczyk, Ludomir

Affiliations: Faculty of Process and Environmental Engineering, Lodz Technical University, 213 Wólczanska St.,90-924 Lodz, Poland | Department of Radiology and Diagnostic Imaging Medical University of Lódz, 22 Kopcinskiego Str., 90-153 Lodz, Poland

Note: [] Corresponding author: Ireniusz Zbicinski, Faculty of Process and Environmental Engineering, Lodz Technical University, 213 Wólczanska St., 90-924 Lodz, Poland. Tel.: +48 42 6313773; Fax: +48 42 636-56-63; E-mail: [email protected].

Keywords: Fluid-structure interaction, abdominal aortic aneurysm, mechanical parameters of the aortic wall, computed tomography, computational fluid dynamics

DOI: 10.3233/BME-141066

Journal: Bio-Medical Materials and Engineering, vol. 24, no. 6, pp. 2519-2526, 2014

Published: 2014
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Abstract

In this study, a fluid-structure interaction analysis based on the application of patient-specific mechanical parameters of the aneurismal walls was carried out to predict the rupture side during an abdominal aortic aneurysm (AAA). Realistic geometry of the aneurysm was reconstructed from CT data acquired from the patient, and patient-specific flow conditions were applied as boundary conditions. A newly developed non-invasive methodology for determining the mechanical parameters of the patient-specific aortic wall was employed to simulate realistic aortic wall behaviors. Analysis of the results included time-averaged wall shear stress (TAWSS), oscillatory shear index (OSI), and von Mises stress (VMS). Results of the TAWSS, OSI, and VMS were compared to identify the most probable region of the AAA's rupture. High OSI, which identified the region of wall degradation, coincided with the location of maximum VMS, meaning that the anterior part of the aneurismal wall was a potential region of rupture.

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