The accuracy of thin-shell theory in estimation of aneurysm rupture

Zendehbudi, Gholam Reza; Kazemi, Ali

doi:10.1016/j.jbiomech.2007.04.022

Cited by 2 publications

(6 citation statements)

References 25 publications

(17 reference statements)

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“…ILT fissures were directly identified from the CTA images (direct rupture analysis). 19 of intact AAAs, and calculations based on data from other studies showed a prevalence of 6% 24 and 12%. 25 It is noted that a fissure in the ILT must be filled with contrast agent to become visible in CTA images, and the low prevalence of detected ILT fissures does not imply that ILT fissuring is a relatively rare event.…”

Section: Discussionmentioning

confidence: 86%

“…Alternatively, ruptured aneurysms, known to have a higher prevalence for ILT fissuring (rupture) signs, could have been used for the present study. 19 However, rupture alters aneurysm geometry, which makes the identification of the geometry before rupture, that is, as it is required as input for the FE model, difficult. Naturally, FE models introduce numerous modelling assumptions and can only reflect the biomechanics of the real aneurysm to some degree of completeness.…”

Section: Discussionmentioning

confidence: 99%

“…To this end, the mesh was refined in axial, circumferential and radial directions to accurately capture stress gradients along these directions. 23 All FE computations considered large deformations, and the stress concentration factor was calculated, that is, the relative increase of the von Mises stress due to the insertion of the real (direct fissure analysis) or hypothetical (idealised fissure analysis) crack.…”

Section: Fe Modelmentioning

confidence: 99%

“…17,18 Finally, signs of ruptures in the ILT allowing blood to reach the weakened underlying wall are more pronounced in ruptured than in intact AAAs. 19 The Finite Element (FE) method divides any geometry into a large number of small FEs All FEs together give the FE mesh, which is used to compute stresses and strains in the whole AAA. In this study, we investigate the hypothesis that ILT failure increases wall stress using FE analysis of nonruptured AAAs with intact and fissured (ruptured) ILTs.…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Intraluminal Thrombus Failure on the Mechanical Stress in the Wall of Abdominal Aortic Aneurysms

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“…There exists a steady state analytical solution for tubes with fixed ends, loaded with internal pressure (Ogden, 1997). The thick-walled solution had to be used here (Zendehbudi and Kazemi, 2007), since the wall thickness-diameter ratio is around 6% (Pearson et al, 1994). The analytical calculations were carried out in Maple 13.…”

Section: Solid Domainmentioning

confidence: 99%

Boundary conditions for flow simulations of abdominal aortic aneurysms

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Paál

2014

International Journal of Heat and Fluid Flow

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The accuracy of thin-shell theory in estimation of aneurysm rupture

Cited by 2 publications

References 25 publications

The Impact of Intraluminal Thrombus Failure on the Mechanical Stress in the Wall of Abdominal Aortic Aneurysms

Boundary conditions for flow simulations of abdominal aortic aneurysms

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