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Related Experiment Videos

Variations in bronchial movement.

W S Holden, R Marshall

    Clinical Radiology
    |October 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Bronchial calibre varies significantly with breathing and coughing, especially in smaller airways. Routine expiratory films during bronchography can reveal bronchial wall weakness not apparent on inspiration alone.

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    Area of Science:

    • Pulmonary Medicine
    • Radiology
    • Anatomy

    Background:

    • Bronchography is a key imaging technique for evaluating the bronchial tree.
    • Understanding bronchial dynamics during respiration and coughing is crucial for diagnosing airway diseases.
    • Previous studies utilized oscillography for bronchial measurements, intra-oesophageal pressures, and lung volumes.

    Purpose of the Study:

    • To investigate bronchial movement and calibre variations in bronchi and bronchioles using magnification techniques.
    • To assess the significance of bronchial wall characteristics and their changes during respiration and coughing.
    • To determine the diagnostic value of expiratory films in bronchography.

    Main Methods:

    • Magnification technique applied to routine bronchography.

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  • Analysis of serial films during full inspiration and extreme expiration.
  • Comparison with previous records measuring bronchial dimensions, intra-oesophageal pressures, and lung volumes.

    • Main Results:

    • Wide variations in bronchial calibre observed between inspiration and expiration, most pronounced in smaller bronchi.
    • Maximal width differences during coughing occurred in larger airways; minimal changes in the smallest bronchi.
    • Bronchial walls exhibit undulating outlines that change on serial films; irregularities can exist even without disease.

    Conclusions:

    • Bronchial wall weakness, not evident on inspiratory films, can be detected on expiratory radiographs.
    • Irregularities in airway shape are common and can be exacerbated by disease.
    • Routine inclusion of expiratory films in all bronchographic examinations is recommended for comprehensive assessment.