Detail publikačního výsledku

Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms

NOVÁK, K.; POLZER, S.; BURŠA, J.

Originální název

Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms

Anglický název

Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms

Druh

Článek WoS

Originální abstrakt

In the paper impact of different material models on the calculated peak wall stress (PWS) and peak wall rupture risk (PWRR) in abdominal aortic aneurysms (AAAs) is assessed. Computational finite element models of 70 patient-specific AAAs were created using two different material models – a realistic one based on mean population results of uniaxial tests of AAA wall considered as reference, and a 100 times stiffer artificial model. The calculated results of PWS and PWRR were tested to evaluate statistical significance of differences caused by the non-realistic material model. It was shown that for majority of AAAs the differences are insignificant but for some 10% of them their relative differences exceed 20% which may lead to incorrect decisions on their surgical treatment. This percentage of failures favours application of realistic material models in clinical practise although they are much more time-consuming.

Anglický abstrakt

In the paper impact of different material models on the calculated peak wall stress (PWS) and peak wall rupture risk (PWRR) in abdominal aortic aneurysms (AAAs) is assessed. Computational finite element models of 70 patient-specific AAAs were created using two different material models – a realistic one based on mean population results of uniaxial tests of AAA wall considered as reference, and a 100 times stiffer artificial model. The calculated results of PWS and PWRR were tested to evaluate statistical significance of differences caused by the non-realistic material model. It was shown that for majority of AAAs the differences are insignificant but for some 10% of them their relative differences exceed 20% which may lead to incorrect decisions on their surgical treatment. This percentage of failures favours application of realistic material models in clinical practise although they are much more time-consuming.

Klíčová slova

Abdominal aortic aneurysm, peak wall stress, finite element model

Klíčová slova v angličtině

Abdominal aortic aneurysm, peak wall stress, finite element model

Autoři

NOVÁK, K.; POLZER, S.; BURŠA, J.

Rok RIV

2019

Vydáno

02.03.2018

Nakladatel

IOS Press

Místo

Amsterdam, Nizozemsko

ISSN

0928-7329

Periodikum

TECHNOLOGY AND HEALTH CARE

Svazek

26

Číslo

1

Stát

Nizozemsko

Strany od

165

Strany do

173

Strany počet

9

URL

https://content.iospress.com/articles/technology-and-health-care/thc171024

BibTex

@article{BUT143315,
  author="Kamil {Novák} and Stanislav {Polzer} and Jiří {Burša}",
  title="Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms",
  journal="TECHNOLOGY AND HEALTH CARE",
  year="2018",
  volume="26",
  number="1",
  pages="165--173",
  doi="10.3233/THC-171024",
  issn="0928-7329",
  url="https://content.iospress.com/articles/technology-and-health-care/thc171024"
}