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Related Experiment Videos

Head trauma: single-notch and double-notch audiograms

C D Bauch

    Scandinavian Audiology
    |January 1, 1981
    PubMed
    Summary

    Head trauma can cause sensorineural hearing loss, presenting as audiometric notches. This study observed such hearing loss in patients without noise exposure, highlighting trauma as a potential cause.

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    Area of Science:

    • Audiology
    • Neuroscience
    • Trauma Medicine

    Background:

    • Sensorineural hearing loss (SNHl) can result from various factors.
    • Audiometric notches, particularly single-notch and double-notch patterns, are specific hearing loss configurations.
    • Head trauma is a recognized, though less common, cause of hearing impairment.

    Purpose of the Study:

    • To investigate the relationship between head trauma and the occurrence of notch audiograms.
    • To determine if laterality or degree of hearing loss correlates with head trauma characteristics.
    • To assess the prevalence of audiometric notches in patients with a history of head trauma but no noise exposure.

    Main Methods:

    • Retrospective analysis of 27 adult patients with single-notch or double-notch SNHl.
    • Detailed patient history collection focusing on head trauma, noise exposure, and symptoms.
    • Audiometric evaluation to characterize hearing loss patterns and degree.

    Main Results:

    • All 27 patients reported head trauma, with no history of noise exposure.
    • Hearing loss laterality and degree did not consistently correlate with head trauma severity or location.
    • No clear correlation was found between audiometric notch patterns and post-traumatic symptoms.

    Conclusions:

    • Head trauma should be considered as a potential cause of sensorineural hearing loss presenting with audiometric notches.
    • The absence of noise exposure history in patients with notch audiograms warrants further investigation into head trauma.
    • Clinical evaluation should include a thorough history of head trauma when audiometric notches are identified.

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