The Role of Geometric Parameters in the Prediction of Abdominal Aortic Aneurysm Wall Stress

E. Georgakarakos, C. V. Ioannou, Y. Kamarianakis, Y. Papaharilaou, T. Kostas, E. Manousaki, A. N. Katsamouris

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Objective: To study the correlation between peak wall stress (PWS) and abdominal aorta aneurysm (AAA) geometric parameters in the presence of intraluminal thrombus (ILT). Design: Computational study using finite element analysis. Material: AAA models were created by three-dimensional (3D) reconstruction of in vivo acquired computed tomography (CT) images from 19 patients. Methods: PWS was evaluated in the presence and absence of ILT. ΔPWS% represents the percentage change in PWS in the presence of ILT. The 3D lumen centrelines were extracted, and the values of torsion, tortuosity and mean curvature were estimated. Results: A positive correlation was observed between ΔPWS% and relative ILT volume (P = 0.03). PWS in the presence of ILT significantly correlated only with the degree of centerline tortuosity (P = 0.003) and maximum diameter (P < 0.0001). The optimal predictive model for PWS in the presence of ILT was estimated to contain both maximum diameter and centreline tortuosity. Conclusions: Specific geometric parameters in AAA models in the presence of ILT could serve as potential predictors of elevated PWS. PWS correlated significantly with the maximum diameter and the degree of centreline tortuosity. Centreline tortuosity may become a useful addition to maximum diameter in the decision-making process of AAA treatment.

Original languageEnglish (US)
Pages (from-to)42-48
Number of pages7
JournalEuropean Journal of Vascular and Endovascular Surgery
Volume39
Issue number1
DOIs
StatePublished - Jan 2010
Externally publishedYes

Keywords

  • Centreline geometry
  • Finite element analysis
  • Intraluminal thrombus
  • Wall stress

ASJC Scopus subject areas

  • Surgery
  • Cardiology and Cardiovascular Medicine

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