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    The influence of ventilation tube design on the magnitude of stress imposed at the implant/tympanic membrane interface.

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    Authors
    Vard, John P
    Kelly, Daniel J
    Blayney, Alexander W
    Prendergast, Patrick J
    Affiliation
    Trinity Centre for Bioengineering, School of Engineering, Trinity College, Dublin, Ireland.
    Issue Date
    2008-03
    MeSH
    Analysis of Variance
    Biomechanics
    Biomedical Engineering
    Computer Simulation
    Finite Element Analysis
    Humans
    Middle Ear Ventilation
    Models, Anatomic
    Models, Biological
    Otitis Media with Effusion
    Prostheses and Implants
    Prosthesis Design
    Tympanic Membrane
    Vibration
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    Citation
    The influence of ventilation tube design on the magnitude of stress imposed at the implant/tympanic membrane interface. 2008, 30 (2):154-63 Med Eng Phys
    Journal
    Medical engineering & physics
    URI
    http://hdl.handle.net/10147/263395
    DOI
    10.1016/j.medengphy.2007.03.005
    PubMed ID
    17531521
    Abstract
    The design of ventilation tubes or grommets is thought to have a considerable influence on their performance. A computational model (finite element method) was used to investigate the significance of four design parameters of a commonly used design of ventilation tube. The design parameters were: the length of the shaft, the diameter of the flanges, the thickness of the flanges, and the material type. A statistical analysis technique, known as a factorial analysis of variance, was used to examine the importance of the four design parameters on the dynamical behaviour of the middle ear with the implant in situ and on the magnitude of stress induced at the implant/tympanic membrane interface. We predicted that the ventilation tube alters the frequency response of the middle ear; specifically the shaft length and the thickness of the flanges were found to have a significant effect upon the vibratory pattern at the umbo. A reduced length of tube and an increased size of flange were also found to be significant for minimising membrane stress (both with P<0.001). Thus, design parameters of critical influence on optimising performance were identified.
    Item Type
    Article
    Language
    en
    ISSN
    1350-4533
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.medengphy.2007.03.005
    Scopus Count
    Collections
    Temple Street Hospital

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