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http://dx.doi.org/10.7734/COSEIK.2020.33.3.179

Evaluation of Stress Characteristics and Rupture Risk of the Aortic Wall According to Abdominal Aortic Aneurysm Geometry and Age  

Lee, Chung Won (Department of Thoracic and Cardiovascular Surgery, Pusan National University Hospital)
You, Ji-Hun (Department of Biomedical Engineering, Graduate School, Pusan National Univ.)
Huh, Up (Department of Thoracic and Cardiovascular Surgery, Pusan National University Hospital)
Lee, Chi-Seung (Department of Convergence Medicine, School of Medicine, Pusan National Univ.)
Ryu, Dong-Man (Department of Mechanical Engineering, Michigan State Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.33, no.3, 2020 , pp. 179-186 More about this Journal
Abstract
In this study, the wall stress and rupture risk for abdominal aortic aneurysms were calculated based on the age and geometry of the examined abdominal aortic aneurysms. The geometry of the abdominal aorta was simulated using computed tomography data from patients with abdominal aortic aneurysms. With regard to material properties, the Gasser-Ogden-Holzapfel model was applied to the analysis to simulate the anisotropic hyperelastic characteristics of the artery. In addition, each material parameter was estimated to consider the properties for age and for normal and aneurysm tissue. Moreover, the correlation between the diameter and angle of the aortic aneurysms was analyzed based on data from patients with abdominal aortic aneurysms, and series simulations were conducted. As a result, the rupture risk for the abdominal aortic aneurysms was evaluated based on the age and geometry of the aneurysm.
Keywords
abdominal aortic aneurysm; hyperelastic constitutive equation; peak wall stress; rupture risk;
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