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Related Experiment Videos

Bilateral simultaneous sudden deafness.

N Yanagita, K Murahashi

    Archives of Oto-Rhino-Laryngology
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Sudden deafness, often unilateral, can rarely be bilateral and simultaneous. Hearing recovery in bilateral sudden deafness is better in the less affected ear, with no recovery in non-perceptive ears.

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    Area of Science:

    • Otolaryngology
    • Neurology

    Background:

    • Sudden deafness is typically sensorineural hearing loss with abrupt onset and unknown cause.
    • Most cases are unilateral; bilateral simultaneous onset is rare.

    Purpose of the Study:

    • To investigate the characteristics and outcomes of sudden deafness with bilateral simultaneous onset.

    Main Methods:

    • Retrospective analysis of 997 sudden deafness patients treated over 13 years.
    • Inclusion criteria: seen within 2 weeks of onset, observed until hearing level fixed.
    • Focus on 10 patients with bilateral simultaneous onset.

    Main Results:

    • Bilateral sudden deafness patients had similar average age and vestibular symptoms to unilateral cases.
    • Hearing recovery was significantly better in the ear with lesser hearing loss.

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  • No hearing improvement occurred in ears with no sound perception.
  • Cases triggered by cold/fever showed high viral antibody titers, more frequently than unilateral cases.

    • Conclusions:

    • Bilateral simultaneous sudden deafness is rare but shares demographic and vestibular characteristics with unilateral cases.
    • Prognosis for hearing recovery in bilateral sudden deafness depends on the degree of initial loss in each ear.
    • Viral infections may play a more significant role in bilateral sudden deafness onset.