Mechanical Evaluation of Growth and Rupture of Aneurysm in Abdominal Aorta

概要

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Mechanical evaluation is performed for the growth and rupture of aneurysms in the human abdominal aorta, making use of mechanical factors that largely affect the deformation and stress distribution in the vascular wall. The intrinsic factors of the wall, i.e., the maximum diameter and the wall thickness in the unloaded state, as well as the external factor, i.e., the blood pressure, are adopted in the finite-element analysis of the deformation and stress in aneurysms. The results of the analysis show that the increase of the vascular diameter in the unloaded state and the reduction of the wall thickness due to the progress of the aneurysm lead to significantly high stress that is comparable to the strength of the wall. High blood pressure also increases the wall stress significantly, especially when the aneurysm grows large, though the difference in the shape of the aneurysm is difficult to distinguish by sight.
一般社団法人日本機械学会の論文
1994-04-15