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Sensorineural hearing loss in posttraumatic incus dislocation.

H Dommerby, M Tos

    Archives of Otolaryngology (Chicago, Ill. : 1960)
    |April 1, 1983
    PubMed
    Summary
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    Sensorineural hearing loss after incus dislocation is common initially but does not reliably worsen over time. This study suggests it is not a progressive inner ear disorder.

    Area of Science:

    • Otolaryngology
    • Audiology
    • Trauma Surgery

    Background:

    • Incus dislocations can result from head trauma.
    • Sensorineural hearing loss (SNHL) is a potential consequence of such trauma.
    • The long-term progression of posttraumatic SNHL requires further investigation.

    Purpose of the Study:

    • To analyze the initial and long-term sensorineural hearing loss in patients with posttraumatic incus dislocations.
    • To determine if sensorineural hearing loss following incus dislocation is a progressive condition.

    Main Methods:

    • Retrospective analysis of 34 patients with posttraumatic incus dislocations.
    • Comparison of sensorineural hearing loss measurements taken shortly after trauma (primary) and 11 years later (late).
    • Audiometric evaluation across frequencies from 1,000 to 4,000 Hz.

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    Main Results:

    • 53% of patients exhibited SNHL >10 dB at specific frequencies initially; 18% had SNHL >30 dB.
    • At 11-year follow-up, 50% showed SNHL >10 dB and 15% showed SNHL >30 dB.
    • No consistent progression of SNHL was observed, with only minor exceptions.

    Conclusions:

    • Sensorineural hearing loss following incus dislocation is not typically a progressive disorder.
    • The inner ear appears stable regarding SNHL in these cases over an 11-year period.
    • Further research may explore the specific mechanisms influencing SNHL in trauma patients.