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Test Findings

Airway Narrowing



  • Narrowing of the airway may be caused by obstruction within the airway lumen, inflammation within the airway walls, or external compression.
    • Look For

    • A small-calibre airway with either diffuse or focal narrowing.
    • Causes of Airway Narrowing

    • Previous airway injury - direct trauma, burns, radiation, prolonged intubation
    • Infection - e.g. tuberculosis
    • Inflammatory - Wegener’s granulomatosis, systemic lupus erythematosus, , rheumatoid arthritis, amyloidosis, sarcoidosis
    • Airway tumour
    • Congenital tracheal stenosis
    • Idiopathic subglottic stenosis
    • Foreign body
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