Biomechanical analysis of an aortic aneurysm model and its clinical application to thoracic aortic aneurysms for defining "saccular" aneurysms

We aimed to develop a simple structural model of aortic aneurysms using computer-assisted drafting (CAD) in order to create a basis of definition for saccular aortic aneurysms. We constructed a simple aortic aneurysm model with 2 components: a tube similar to an aorta and an ellipse analogous to a b...

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Bibliographic Details
Published in:Journal of the American Heart Association 2015-01, Vol.4 (1), p.e001547-e001547
Main Authors: Akai, Takafumi, Hoshina, Katsuyuki, Yamamoto, Sota, Takeuchi, Hiroaki, Nemoto, Youkou, Ohshima, Marie, Shigematsu, Kunihiro, Miyata, Tetsuro, Yamauchi, Haruo, Ono, Minoru, Watanabe, Toshiaki
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Aneurysm - diagnostic imaging
Aneurysm - physiopathology
Aneurysm, Ruptured - prevention & control
Aortic Aneurysm, Thoracic - diagnostic imaging
Aortic Aneurysm, Thoracic - physiopathology
Aortography - methods
Biomechanical Phenomena
Computer Simulation
Disease Progression
Humans
Imaging, Three-Dimensional
Models, Cardiovascular
Monitoring, Physiologic
Observer Variation
Original Research
Risk Assessment
Sampling Studies
Stress, Mechanical
Tomography, X-Ray Computed - methods
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Summary:We aimed to develop a simple structural model of aortic aneurysms using computer-assisted drafting (CAD) in order to create a basis of definition for saccular aortic aneurysms. We constructed a simple aortic aneurysm model with 2 components: a tube similar to an aorta and an ellipse analogous to a bulging aneurysm. Three parameters, including the vertical and horizontal diameters of the ellipse and the fillet radius, were altered in the model. Using structural analysis with the finite element method, we visualized the distribution of the maximum principal stress (MPS) in the aortic wall and identified the area(s) of prominent stress. We then selected patients with thoracic aortic aneurysms in whom the aneurysm expansion rates were followed up and applied the theoretical results to the raw imaging data. The maximum MPS drastically increased at areas where the aspect ratio (vertical/horizontal) was
ISSN:2047-9980
2047-9980
DOI:10.1161/jaha.114.001547