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Analysis of the mechanical parameters of human brain aneurysm

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Języki publikacji
EN
Abstrakty
EN
Cardiovascular disease is one of the most frequent reasons of mortality in the western word. Nowadays the mechanical properties of biological soft tissues were treated from a continuum mechanical perspective. The aim of this article is to investigate the mechanical response of arterial tissue. We present some three-dimensional finite element model to study the mechanical effects. The arterial wall is composed mainly of an isotropic matrix materiał (elastin) and collagen fibers from two families which are arranged in symmetncal spirals. These fibers induce the anisotropy in the materiał response. So the constitutive law of an artery is orthotropic. We want to develop a new constitutive law for arterial wall mechanics. In addition we make a comparative study of some material model used in the literature to describe the mechanical response of arteries. These are the following models: 1. Linearly elastic model. 2. Neo-Hookean model for incompressible materials. 3. Mooney-Rivlin model for incompressible materials. For this reason we make uniaxial and biaxial measurements to have appropriate parameters for the underlying material models. We investigate the biomechanical properties of strips from human cerebral aneurysms from surgery and cadavers. (An aneurysm is a bulge along a blood vessel.) Meridional and circumferential. thick and thin parts were distinguished respectively. This paper focuses on the analysis of the haemodynamic pattern and biophysical properties of cerebral aneurysms. diagnosed aiid delineated in living human individuals. The aim of this research is to estimate stresses at critical points of the aneurysm wall and its parent artery, and to estimate the likelihood of a later aneurysm rupture.
Rocznik
Strony
3--22
Opis fizyczny
Bibliogr. 56 poz., rys., tab., wykr.
Twórcy
  • Budapest University of Technology and Economics, 1111 Budapest, Muegyetem r.3, Hungary
autor
  • Clinical Research Department, Second Institute of Physiology, Semmelweis University of Medicine, 1082 Budapest, ÜllĘi út 78/a., Hungary
autor
  • Budapest University of Technology and Economics, 1111 Budapest, MĦegyetem r. 3., Hungary
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPB1-0021-0001
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