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Cupulolithiasis and posterior ampullary nerve transection.

R R Gacek

    The Annals of Otology, Rhinology & Laryngology. Supplement
    |July 1, 1984
    PubMed
    Summary

    Surgical transection of the posterior ampullary nerve effectively relieved chronic cupulolithiasis, a condition causing paroxysmal positional vertigo. Modifications in surgical technique reduced the incidence of sensorineural hearing loss.

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    Area of Science:

    • Otolaryngology
    • Neurology
    • Vestibular System

    Background:

    • Cupulolithiasis involves otoconial masses affecting the posterior semicircular canal cupula.
    • This condition is hypothesized to make the cupula gravity-sensitive, causing vertigo.

    Purpose of the Study:

    • To provide clinical support for the pathophysiology of cupulolithiasis.
    • To evaluate the efficacy of posterior ampullary nerve transection for treating chronic cupulolithiasis.

    Main Methods:

    • Observation of patients with chronic cupulolithiasis undergoing posterior ampullary nerve transection (singular neurectomy).
    • Surgical intervention involved transection of the posterior ampullary nerve in affected ears.

    Main Results:

    • Complete relief from paroxysmal positional vertigo was achieved in 31 ears of 29 patients.
    • Bilateral cases were successfully treated with sequential bilateral singular neurectomies.
    • Unilateral singular neurectomy relieved 27 patients.
    • Early surgical complications included three instances of sensorineural hearing loss, which were eliminated in later procedures due to technique modifications.

    Conclusions:

    • Posterior ampullary nerve transection is an effective treatment for chronic cupulolithiasis.
    • Surgical technique modifications have significantly reduced the risk of sensorineural hearing loss, improving surgical safety.

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