Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Wave propagation in an elastic waveguide: fluid-structure interactions in a spinal disease

    Access Status
    Fulltext not available
    Authors
    Elliott, Novak
    Lucey, Anthony
    Lockerby, D.
    Brodbelt, A.
    Date
    2010
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Elliott, Novak S. J. and Lucey, Anthony D. and Lockerby, Duncan A. and Brodbelt, Andrew R. 2010. Wave propagation in an elastic waveguide: fluid-structure interactions in a spinal disease, in Teh, K. and Davies, I. and Howard, I. (ed), 6th Australasian Congress on Applied Mechanics, ACAM 6, Dec 12-15 2010.Perth, WA: Engineers Australia.
    Source Title
    Proceedings of the 6th Australasian Congress on Applied Mechanics
    Source Conference
    6th Australasian Congress on Applied Mechanics, ACAM 6
    Additional URLs
    http://search.informit.com.au/documentSummary;dn=020267968152808;res=IELENG
    ISBN
    978-0-85825-941-6
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/29678
    Collection
    • Curtin Research Publications
    Abstract

    Syringomyelia is a disease in which fluid-filled cavities, called syrinxes, form in the spinal cord (SC). The progressive expansion of syrinxes over many years compresses the surrounding nerve fibres and blood vessels, which is associated with neurological damage. In the present work we aim to elucidate the mechanics underlying syrinx formation and expansion by investigating the wave-propagation characteristics of the spinal system in healthy and diseased configurations. We use the standard biomechanical analogue consisting of cylindrical, axisymmetric solid and fluid layers. Specifically, the SC is represented as an elastic cylinder, which becomes an annulus containing inviscid fluid when a syrinx is included, and this is surrounded by inviscid fluid representing the cerebrospinal fluid (CSF) occupying the subarachnoid space, bound by a rigid dura. The model is formulated as a system of Helmholtz equations which describe axisymmetric harmonic motion of the cylindrical layers. These equations are discretised using Chebyshev polynomials and then solved as a generalised eigenvalue problem. This linear algebra approach gives explicit access to wave properties like traditional root-finding methods butwithout the need for a long wave assumption, and is also more computationally efficient than finite element/volume methods used in other spinal models.Our results reproduce the wave speeds of other syringomyelia models and the dispersion diagrams are qualitatively similar to other acoustic models with like topologies. This demonstrates the applicability of the numerical method to the biological problem. Additionally we are able to recover the associated displacement and stress modes from the eigenvectors.This investigation serves as a framework for studying cylindrical waveguides in biological systems.

    Related items

    Showing items related by title, author, creator and subject.

    • Fluid–structure interactions in a cylindrical layered wave guide with application in the spinal column to syringomyelia
      Elliott, N.; Lucey, Anthony; Lockerby, D.; Brodbelt, A. (2017)
      © 2016Syringomyelia is a disease of the spinal cord in which fluid-filled cavities, called syrinxes, form and expand, compressing the surrounding neural tissue and producing neurological damage. This condition can occur ...
    • Syrinx fluid transport: modeling pressure-wave-induced flux across the spinal pial membrane
      Elliott, Novak (2012)
      Syrinxes are fluid-filled cavities of the spinal cord that characterize syringomyelia, a disease involving neurological damage. Their formation and expansion is poorly understood, which has hindered successful treatment. ...
    • Syringomyelia and the fluid-structure interactions of a cerebrospinal waveguide
      Elliott, N.; Lucey, Anthony; Lockerby, D.; Brodbelt, A. (2014)
      In the disease syringomyelia, fluid-filled cavities, called syrinxes, form in the spinal cord. The expansion of these pathological pressure vessels compresses the surrounding nerve fibers and blood supply, which is ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.