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Related Experiment Video

Updated: Feb 2, 2026

Creation of Two Saccular Elastase-Digested Aneurysms with Different Hemodynamics in One Rabbit
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Relationship between hemodynamic parameters and cerebral aneurysm initiation.

Kazutoshi Tanaka, Hiroyuki Takao, Takashi Suzuki

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |November 17, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Identifying cerebral aneurysm initiation factors is key for prediction. High wall shear stress divergence (WSSD) regions strongly correlate with aneurysm initiation, suggesting stretching forces play a role.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Research
    • Medical Physics

    Background:

    • Cerebral aneurysm initiation and growth mechanisms remain incompletely understood.
    • Predicting aneurysm initiation requires identifying contributing factors.
    • Hemodynamic parameters are implicated in aneurysm development.

    Purpose of the Study:

    • To investigate the relationship between hemodynamic factors and cerebral aneurysm initiation.
    • To identify specific hemodynamic parameters associated with the onset of aneurysms.

    Main Methods:

    • Computational fluid dynamics (CFD) simulations of blood flow.
    • Analysis of pre-aneurysm cerebral blood vessel geometry from three patients.
    • Evaluation of pressure, wall shear stress (WSS), WSS gradient (WSSG), oscillatory shear index (OSI), gradient oscillatory number (GON), and wall shear stress divergence (WSSD).

    Main Results:

    • High wall shear stress divergence (WSSD) regions were identified as corresponding to aneurysm initiation sites.
    • Remarkably high WSSD values were observed in these initiation regions.
    • A correlation between stretching force on the vessel wall and aneurysm initiation was suggested.

    Conclusions:

    • Wall shear stress divergence (WSSD) is a critical indicator of cerebral aneurysm initiation.
    • Stretching forces exerted on the vessel wall may be a key factor in aneurysm formation.
    • Further research into WSSD could lead to improved aneurysm prediction models.