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Related Experiment Videos

Glottis narrowing in lung disease

T Higenbottam, J Payne

    The American Review of Respiratory Disease
    |June 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Patients with airflow obstruction exhibit a narrowed glottis chink, particularly during expiration. This glottis narrowing may play a role in controlling airflow in these individuals.

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    Area of Science:

    • Respiratory Physiology
    • Anatomy
    • Pulmonology

    Background:

    • The glottis, the space between the vocal folds, is a critical component of the airway.
    • Understanding glottis dynamics is important for respiratory function, especially in obstructive lung diseases.

    Purpose of the Study:

    • To investigate glottis width variations during breathing in patients with airflow obstruction.
    • To determine if glottis narrowing contributes to airflow control in these patients.

    Main Methods:

    • Photographic measurement of glottis chink width using fiberoptic bronchoscopy in 34 patients.
    • Calculation of glottis width adjusted for photographic scale using cadaver data.
    • Assessment of glottis width during quiet breathing, panting, and maximal exhalation.

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    Main Results:

    • Patients with airflow obstruction showed a narrowed glottis chink, especially during expiration.
    • Glottis narrowing persisted during panting and maximal exhalation in obstructed patients.
    • In contrast, healthy individuals (FEV1 > 80%) showed glottis opening during maximal exhalation.

    Conclusions:

    • Glottis narrowing is a characteristic finding in patients with airflow obstruction.
    • This narrowing appears to be a mechanism for airflow control in obstructive airway disease.