Impact of Diversity of Morphological Characteristics and Reynolds number on Local Hemodynamics in Basilar Aneurysms

Marjan Rafat, Mahsa Dabagh, Martin Heller, James D. Rabinov, Howard A. Stone, Amanda Randles, Debra T. Auguste*

*Corresponding author for this work

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    Abstract

    Morphological and hemodynamic parameters have been suggested to affect the rupture of cerebral aneurysms, but detailed mechanisms of rupture are poorly understood. The purpose of our study is to determine criteria for predicting the risk of aneurysm rupture, which is critical for improved patient management. Existing aneurysm hemodynamics studies generally evaluate limited geometries or Reynolds numbers (Re), which are difficult to apply to a wide range of patient-specific cases. We focused on the association between hemodynamic characteristics and morphology. We assessed several two-dimensional (2D) and three-dimensional (3D) idealized and physiological geometries to characterize the hemodynamic landscape between flow patterns. The impact of morphology on velocity and wall shear stress (WSS) profiles were evaluated. We found that slight changes in aneurysm geometry or Re result in significant changes in the hemodynamic and WSS profiles. Our systematic mapping and non-dimensional analysis qualitatively identify hemodynamic conditions that may predispose aneurysms to rupture. This article is protected by copyright. All rights reserved.
    Original languageEnglish
    JournalA I Ch E Journal
    Volume64
    Issue number7
    Pages (from-to)2792-2802
    ISSN0001-1541
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Wall shear stress
    • Aneurysm geometry
    • Flow patterns
    • Hemodynamics
    • Computational fluid dynamics

    Cite this

    Rafat, M., Dabagh, M., Heller, M., Rabinov, J. D., Stone, H. A., Randles, A., & Auguste, D. T. (2018). Impact of Diversity of Morphological Characteristics and Reynolds number on Local Hemodynamics in Basilar Aneurysms. A I Ch E Journal, 64(7), 2792-2802. https://doi.org/10.1002/aic.16091