title: 2D FSI determination of mechanical stresses on aneurismal walls.
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.
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz Technical University, 213 Wólczanska St.,90-924 Lodz, Poland.
authors.forename: Natalia
authors.initials: N
authors.lastname: Veshkina
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz Technical University, 213 Wólczanska St.,90-924 Lodz, Poland.
authors.forename: Ireneusz
authors.initials: I
authors.lastname: Zbicinski
authors.affiliation: Department of Radiology and Diagnostic Imaging Medical University of Lódz, 22 Kopcinskiego Str., 90-153 Lodz, Poland.
authors.forename: Ludomir
authors.initials: L
authors.lastname: Stefańczyk
mesh_terms: D000369:Aged, 80 and over; D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001012:Aorta, Abdominal / Q000000981:diagnostic imaging / Q000503:physiopathology*; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001783:Blood Flow Velocity; D001794:Blood Pressure; D019245:Compressive Strength; D003198:Computer Simulation; D006801:Humans; D008297:Male; D008955:Models, Cardiovascular; D011673:Pulsatile Flow; D011859:Radiography; D033081:Shear Strength; D013314:Stress, Mechanical; D013718:Tensile Strength; D014655:Vascular Resistance
keywords: Fluid-structure interaction; abdominal aortic aneurysm; computational fluid dynamics; computed tomography; mechanical parameters of the aortic wall