Detail publikace
Deformačně-napěťová analýza aneurysmatu břišní aorty
BURŠA, J. RYŠAVÝ, P.
Český název
Deformačně-napěťová analýza aneurysmatu břišní aorty
Anglický název
STRESS STRAIN ANALYSIS OF ABDOMINAL AORTIC ANEURYSM
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
Aneurysms of arteries are rather frequent diseases of cardiovascular system, especially among older people, endangering them by their rupture. They are found especially in some of the brain arteries and in abdominal part of aorta. Aneurysm of abdominal aorta (AAA) is a pathological change in lumen (inner diameter) of aorta, with synchronous decrease of wall thickness, often in the whole part between renal arteries and aortic bifurcation. This changes are mostly accompanied by creation of wall thrombus in the deformed region with decreased flow near the aortic wall. The study presented in [1] proved that maximum principal stresses in AAA wall (calculated using a 3D model) predict the risk of its rupture better than the mere maximum diameter of the aneurysm, used as a criterion for decision about its operability in clinical practice. The stress-strain analysis of AAA presented in this paper focuses on comparison of 2D and 3D finite element models of AAAs. Comparison of 2D and 3D models will enable us to evaluate the credibility of the 2D computational model that is highly convenient for computer aided decisions in clinical practices. The significance of axial prestretch in aortic wall can be estimated as well.
Český abstrakt
Příspěvek prezentuje 3D MKP model aneuryzmatu břišní aorty, jehož geometrie je vytvpořena na základě CT snímků pacienty. Rozložení napětí v modelu ukazuje, že maximální napětí se nevyskytují v místě maximálního průměru, a že pro jejich posouzení nestačí 2D model v místě největšího průměru.
Anglický abstrakt
Aneurysms of arteries are rather frequent diseases of cardiovascular system, especially among older people, endangering them by their rupture. They are found especially in some of the brain arteries and in abdominal part of aorta. Aneurysm of abdominal aorta (AAA) is a pathological change in lumen (inner diameter) of aorta, with synchronous decrease of wall thickness, often in the whole part between renal arteries and aortic bifurcation. This changes are mostly accompanied by creation of wall thrombus in the deformed region with decreased flow near the aortic wall. The study presented in [1] proved that maximum principal stresses in AAA wall (calculated using a 3D model) predict the risk of its rupture better than the mere maximum diameter of the aneurysm, used as a criterion for decision about its operability in clinical practice. The stress-strain analysis of AAA presented in this paper focuses on comparison of 2D and 3D finite element models of AAAs. Comparison of 2D and 3D models will enable us to evaluate the credibility of the 2D computational model that is highly convenient for computer aided decisions in clinical practices. The significance of axial prestretch in aortic wall can be estimated as well.
Klíčová slova anglicky
Keywords: Stress-strain analysis, abdominal aortic aneurysm, finite element model
Rok RIV
2006
Vydáno
13.11.2006
Nakladatel
Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics
Místo
Hrotovice
ISBN
80-214-3232-2
Kniha
Human Biomechanics 2006
Strany od–do
178–179
Počet stran
2
BIBTEX
@inproceedings{BUT24575,
author="Jiří {Burša} and Pavel {Ryšavý},
title="STRESS STRAIN ANALYSIS OF ABDOMINAL AORTIC ANEURYSM",
booktitle="Human Biomechanics 2006",
year="2006",
month="November",
pages="178--179",
publisher="Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics",
address="Hrotovice",
isbn="80-214-3232-2"
}