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Pars superioris in endolymphatic hydrops.

J J Saad

    Archives of Otolaryngology (Chicago, Ill. : 1960)
    |October 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Endolymphatic hydrops, a condition affecting the inner ear, leads to increased volumes in the utricle and semicircular canals. This volume increase correlates with hearing loss and vertigo symptoms.

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    Area of Science:

    • Otolaryngology
    • Neuroscience
    • Anatomy

    Background:

    • Endolymphatic hydrops is a disorder characterized by fluid imbalance in the inner ear.
    • The pars superioris, including the utricle and semicircular canals, is crucial for balance and hearing.
    • Volumetric changes in these structures are not well understood in relation to disease progression and symptoms.

    Purpose of the Study:

    • To quantitatively assess the volumetric changes in the endolymphatic compartments of the pars superioris in patients with endolymphatic hydrops.
    • To correlate these volume changes with clinical symptoms such as hearing loss and vertigo.

    Main Methods:

    • A comparative volumetric study was conducted on 15 ears from subjects with unilateral endolymphatic hydrops, 15 contralateral ears, and 15 normal ears.

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  • Measurements focused on the endolymphatic compartments of the pars superioris (utricle and semicircular canals).

    • Main Results:

    • A significant increase in total endolymphatic volume and utricular volume was observed in ears with endolymphatic hydrops compared to normal and contralateral ears.
    • Increased endolymphatic volume correlated positively with the severity of hearing loss.
    • A negative correlation was found between the magnitude of volume increase and the frequency of vertiginous attacks.

    Conclusions:

    • Endolymphatic hydrops is associated with substantial volumetric expansion of the utricle and semicircular canals.
    • These volumetric changes are linked to key clinical manifestations, particularly hearing impairment.
    • The findings suggest that volume measurements may offer insights into the pathophysiology of endolymphatic hydrops.