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The round window membrane: otological observations.

M M Paparella, P A Schachern, Y B Choo

    The Annals of Otology, Rhinology, and Laryngology
    |November 1, 1983
    PubMed
    Summary
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    This study presents the first electron microscopic view of human round window membranes, detailing their structure and healing after injury. Findings reveal distinct cellular responses in the inner and middle ear during wound repair.

    Area of Science:

    • Otolaryngology
    • Cell Biology
    • Microscopy

    Background:

    • The round window membrane is a critical barrier between the middle and inner ear, vital for cochlear function.
    • It plays a significant role in various otological conditions, including otitis media, trauma, and sudden deafness.

    Purpose of the Study:

    • To present the initial electron microscopic findings of adult human round window membranes.
    • To examine these membranes in various pathological conditions.
    • To report preliminary findings on the healing process after experimental lesions in animals.

    Main Methods:

    • Electron microscopy was used to examine human round window membranes.
    • Histological analysis of membranes from patients with various otological conditions.

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  • An experimental lesioning study in animals was conducted to observe healing.

    • Main Results:

    • Detailed electron microscopic structure of the human round window membrane is described.
    • Distinct cellular reactions were observed during the healing of experimental lesions.
    • Mesothelial cells in the scala tympani formed clots, while middle ear epithelium created an indentation ('pocket') during healing.

    Conclusions:

    • The study provides the first electron microscopic insights into human round window membranes.
    • Understanding the membrane's structure and healing is crucial for otological surgeries like cochlear implantation.
    • The findings elucidate the complex cellular mechanisms involved in round window membrane repair.