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Related Experiment Videos

Atelectatic ear and pathologic nasopharynx.

I Kowata, Y Shibahara, T Awataguchi

    Auris, Nasus, Larynx
    |January 1, 1985
    PubMed
    Summary
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    Atelectatic ears are linked to nasopharyngeal pressure changes, particularly during swallowing. Morbid adenoids, characterized by specific projections, contribute to negative intratympanic pressure and Eustachian tube dysfunction.

    Area of Science:

    • Otolaryngology
    • Pediatric Otology
    • Physiology

    Background:

    • Atelectatic ears, characterized by eardrum retraction, are often associated with Eustachian tube dysfunction.
    • Nasopharyngeal conditions, such as adenoid hypertrophy, can significantly impact middle ear pressure.
    • Understanding the dynamic relationship between nasopharyngeal pressure and middle ear pressure is crucial for diagnosing and managing atelectatic ears.

    Purpose of the Study:

    • To investigate the pathologic relationship between atelectatic ears and the nasopharynx.
    • To compare the adenoid characteristics of patients with atelectatic ears to those with healthy ears.
    • To elucidate the role of nasopharyngeal pressure in influencing intratympanic pressure and Eustachian tube function.

    Main Methods:

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  • Transnasal flexible endoscopy and computed tomography (CT) were used to examine 50 patients with atelectatic ears.
  • Adenoid morphology was compared between patients with atelectatic ears and 20 control patients with mouth breathing but no ear problems.
  • Dynamic pressure assessments, including observations during swallowing and catheterization, were performed.

    • Main Results:

    • Swallowing influences intratympanic pressure, indicating Eustachian tube function is pressure-sensitive.
    • Intratympanic negative pressure was confirmed in atelectatic ears with effusion.
    • Morbid adenoids in patients with atelectatic eardrums exhibit a pendulous projection over the choana, distinct from adenoids associated with healthy eardrums.

    Conclusions:

    • A dynamic vacuum, potentially related to the Toynbee phenomenon, is implicated in the pathogenesis of atelectatic ears.
    • Specific adenoid morphologies are associated with Eustachian tube dysfunction and negative middle ear pressure.
    • Nasopharyngeal pressure dynamics play a critical role in the development and maintenance of atelectatic ears.