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Related Experiment Videos

Human cochlear aqueduct and its accessory canals.

H Rask-Andersen, J Stahle, H Wilbrand

    The Annals of Otology, Rhinology & Laryngology. Supplement
    |September 1, 1977
    PubMed
    Summary

    The adult human cochlear aqueduct

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    Area of Science:

    • Anatomy
    • Otolaryngology
    • Radiology

    Background:

    • The cochlear aqueduct is a crucial anatomical structure.
    • Understanding its variations is vital for diagnosing inner ear conditions.

    Purpose of the Study:

    • To describe the anatomy and variations of the adult human cochlear aqueduct.
    • To evaluate imaging techniques for assessing its patency.

    Main Methods:

    • Tomography
    • Microdissection
    • Plastic molding

    Main Results:

    • Mean cochlear aqueduct length: 12.9 mm; external aperture width: 4.2 mm; narrowest portion width: 0.14 mm.
    • 82 specimens showed 3 complete bony obstructions; 79 were patent.
    • Tomography visualized the entire aqueduct in 60% of cases; nonvisualization does not always indicate nonpatency.

    Conclusions:

    • The cochlear aqueduct exhibits normal anatomical variations.
    • Tomographic visualization is limited by narrow lumens, high jugular fossae, and bony obliteration.
    • Accessory canals can complicate imaging assessment.

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