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Does drill noise during mastoid surgery affect the contralateral ear?

A Man, I Winerman

    The American Journal of Otology
    |July 1, 1985
    PubMed
    Summary
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    Drill noise during mastoid surgery did not cause hearing loss in the non-operated ear. Sensorineural hearing loss was only observed in the operated ear, suggesting surgical trauma, not noise, is the primary cause.

    Area of Science:

    • Otolaryngology
    • Neurosurgery
    • Audiology

    Background:

    • Drill noise and surgical trauma in chronic ear surgery are potential causes of sensorineural hearing loss.
    • The contralateral ear is exposed to noise but not surgical trauma, making it a useful comparison.

    Purpose of the Study:

    • To investigate whether drill noise alone, independent of surgical trauma, causes hearing loss in the contralateral ear during mastoid operations.

    Main Methods:

    • A study of 62 patients undergoing mastoid operations.
    • Measurement of sound pressure levels in operated (≤84 dB) and contralateral (≤82 dB) ears.
    • Average drilling time was 45 minutes.

    Main Results:

    • Sensorineural hearing loss was identified in 14 patients in the operated ear.

    Related Experiment Videos

  • No hearing changes were detected in the contralateral ear of any patient.

    • Conclusions:

    • Drill noise during mastoid surgery does not appear to cause exclusive damage to hearing.
    • Surgical trauma, rather than noise, is likely the primary factor contributing to hearing loss in the operated ear.