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Pathophysiology of endolymphatic hydrops.

H F Schuknecht

    Archives of Oto-Rhino-Laryngology
    |September 16, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Endolymphatic hydrops can be nonprogressive, resolving symptoms after an insult, or progressive, causing permanent deficits. Progressive hydrops, linked to endolymphatic sac disorders, causes episodic vertigo and deafness.

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    Area of Science:

    • Otolaryngology
    • Neuroscience
    • Pathology

    Background:

    • Endolymphatic hydrops is a condition characterized by fluid imbalance in the inner ear.
    • Two types exist: nonprogressive, often resolving, and progressive, leading to persistent symptoms.
    • Progressive hydrops is frequently associated with endolymphatic sac disorders.

    Purpose of the Study:

    • To differentiate between nonprogressive and progressive endolymphatic hydrops.
    • To elucidate the underlying mechanisms and causes of each hydrops type.
    • To correlate histological findings with clinical manifestations such as vertigo and Hennebert's sign.

    Main Methods:

    • Clinical observation and classification of endolymphatic hydrops cases.
    • Review of etiological factors, including trauma, toxins, and specific diseases.

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  • Histological examination of inner ear structures in affected individuals.

    • Main Results:

    • Nonprogressive hydrops results from transient insults, potentially causing permanent sensorineural deficits but resolving vestibular symptoms.
    • Progressive hydrops stems from impaired endolymph resorption, often due to endolymphatic sac disorders, and is seen in Menière's disease, syphilitic labyrinthitis, and delayed hydrops syndrome.
    • Histological findings suggest potassium intoxication from membranous labyrinth ruptures causes acute vertigo, and vestibular fibrosis causes Hennebert's sign.

    Conclusions:

    • Endolymphatic hydrops presents distinct clinical courses and underlying pathologies.
    • Progressive hydrops, linked to endolymphatic sac dysfunction, is associated with significant audiovestibular symptoms.
    • Histopathology provides insights into the mechanisms of vertigo and associated signs in hydrops.