Effect of perivascular tissue on inflation-extension behavior of abdominal aorta

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11120%2F16%3A43912534" target="_blank" >RIV/00216208:11120/16:43912534 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/16:00306249

Result on the web

<a href="https://doi.org/10.7712/100016.2283.10742" target="_blank" >https://doi.org/10.7712/100016.2283.10742</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.7712/100016.2283.10742" target="_blank" >10.7712/100016.2283.10742</a>

Result language

angličtina

Original language name

Effect of perivascular tissue on inflation-extension behavior of abdominal aorta

Original language description

The research in the field of cardiovascular biomechanics is focused primarily on the heart and blood vessels, but the surrounding tissues, on the other hand, are often overlooked in the literature. This study shows that the human perivascular adipose tissue can significantly affect mechanical response of the human abdominal aorta. Analytical model of incompressible bilayer thick-walled closed cylindrical tube has been created and subsequently used to simulate the inflation-extension response of the aorta surrounded with adipose tissue. The inner layer, abdominal aorta, was assumed to exhibit residual stresses. The material of this layer was considered as anisotropic and was described by hyperelastic nonlinear constitutive model. The outer layer, fat tissue, was considered to be a hyperelastic isotropic material which does not exhibit residual stress. The outer radius of the aorta and inner radius of the external fatty tube were considered to be equal during the pressurization and axial stretch. The inflation-extension response of bilayer tube was compared with one-layer representing only the abdominal aorta. The simulations showed that the abdominal aorta is more compliant in the circumferential and axial direction in comparison with the fat tissue. The Cauchy stress across the wall thickness of bilayer model and the one-layer tube was determined and compared. The plot of the Cauchy stress versus deformed radius proved that the radial stress satisfies the boundary condition σrr(riA) = -P, ρrr(r0 p) = 0 and σrr(r0 A) = σrr(ri P). An abrupt change in the axial stress by approx. 80 kPa occurs on the contact between the aorta and perivascular tissue. The results of this study suggest that the surrounding tissue should not be neglected in the modeling of blood vessels.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

30201 - Cardiac and Cardiovascular systems

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

ECCOMAS Congress 2016: Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering. Vol. 4

ISBN

978-618-82844-0-1

ISSN

—

e-ISSN

neuvedeno

Number of pages

9

Pages from-to

6616-6624

Publisher name

National Technical University of Athens

Place of publication

Athens

Event location

Hersonissos, Crete

Event date

Jun 5, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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