000001803 001__ 1803
000001803 005__ 20141118153454.0
000001803 04107 $$acze
000001803 046__ $$k2010-05-10
000001803 100__ $$aPolzer, S.
000001803 24500 $$aModel simplification and boundary conditions of  abdominal aortic aneurysm

000001803 24630 $$n16$$pEngineering Mechanics 2010
000001803 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Prague
000001803 506__ $$arestricted
000001803 520__ $$2eng$$aThe article compares different boundary conditions for models of abdominal aortic aneurysms in order to find a suitable boundary condition which would allow removing the bifurcation from the models. Removal of the bifurcation simplifies the geometry reconstruction and FEA. The best way to do so is by cutting it out by a plane which is not perpendicular to the longitudinal axis of the body. Introduction Abdominal aortic aneurysm (AAA) is defined as a permanent dilatation of the abdominal aorta. Its prevalence varies from 3% up to 7% at people above 65 years (Sonesson et al., 1999. Nichols et al.,1998). When left untreated it can lead to a fatal end-rupture. When rupture occurs, a massive internal bleeding will follow. Overall mortality in such cases is about 50%. Therefore it is vital to predict the risk of rupture in order to plan a surgery. So far the diameter of the AAA is a widely accepted criterion for such a decision but the wall stress is a better predictor of rupture (Fillinger et. al., 2002). Recently clinical software has appeared which uses FEA of the AAA to estimate its wall stress in order to predict the rupture risk. Despite a great progress in FEA of AAAs there are still some limitations of its use. First of all, it is necessary to obtain a realistic patient-specific geometry of the AAA. It has been shown that idealized models of AAAs are not able to describe the wall stress distribution realistically (Vorp, 2007

000001803 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000001803 653__ $$a

000001803 7112_ $$aEngineering Mechanics 2010$$cSvratka (CZ)$$d2010-05-10 / 2010-05-13$$gEM2010
000001803 720__ $$aPolzer, S.$$iBurša, J.
000001803 8560_ $$ffischerc@itam.cas.cz
000001803 8564_ $$s652888$$uhttps://invenio.itam.cas.cz/record/1803/files/Polzer-058-PT.pdf$$y
             Original version of the author's contribution as presented on CD, BIO.
            
000001803 962__ $$r1750
000001803 980__ $$aPAPER