Role of 0D peripheral vasculature model in fluid-structure interaction modeling of aneurysms

Ryo Torii, Marie Oshima, Toshio Kobayashi, Kiyoshi Takagi, Tayfun E. Tezduyar

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Patient-specific simulations based on medical images such as CT and MRI offer information on the hemodynamic and wall tissue stress in patient-specific aneurysm configurations. These are considered important in predicting the rupture risk for individual aneurysms but are not possible to measure directly. In this paper, fluid-structure interaction (FSI) analyses of a cerebral aneurysm at the middle cerebral artery (MCA) bifurcation are presented. A 0D structural recursive tree model of the peripheral vasculature is incorporated and its impedance is coupled with the 3D FSI model to compute the outflow through the two branches accurately. The results are compared with FSI simulation with prescribed pressure variation at the outlets. The comparison shows that the pressure at the two outlets are nearly identical even with the peripheral vasculature model and the flow division to the two branches is nearly the same as what we see in the simulation without the peripheral vasculature model. This suggests that the role of the peripheral vasculature in FSI modeling of the MCA aneurysm is not significant.

Original languageEnglish
Pages (from-to)43-52
Number of pages10
JournalComputational Mechanics
Volume46
Issue number1
DOIs
Publication statusPublished - 2010 Jun
Externally publishedYes

Keywords

  • Cerebral aneurysm
  • Fluid-structure interaction
  • Outflow boundary condition
  • Structural tree model

ASJC Scopus subject areas

  • Computational Mechanics
  • Ocean Engineering
  • Mechanical Engineering
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

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