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Chronic cough: bronchoscopy or pulmonary function testing?

R H Poe, R H Israel, M J Utell

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

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    Pulmonary function testing aids in diagnosing chronic cough causes, while bronchoscopy offers limited diagnostic value for isolated chronic cough in patients with normal chest X-rays.

    Area of Science:

    • Pulmonology
    • Diagnostic Medicine

    Background:

    • Chronic cough is a common clinical symptom.
    • Evaluating isolated chronic cough with normal chest X-rays presents diagnostic challenges.

    Purpose of the Study:

    • To assess the diagnostic utility of bronchoscopic examination and pulmonary function testing (PFT) in patients presenting with chronic cough as an isolated symptom.

    Main Methods:

    • Retrospective review of 109 patients with isolated chronic cough and normal chest X-rays.
    • Analysis of diagnostic yield from bronchoscopy (n=51) and PFT (n=87), including spirometry and bronchial challenge tests.

    Main Results:

    • Pulmonary function testing identified previously undiagnosed asthma in 39 patients.
    • Bronchoscopy established carcinoma as the cause of cough in only one patient.

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  • PFT demonstrated significant diagnostic value, whereas bronchoscopy had limited utility.

    • Conclusions:

    • Pulmonary function testing is valuable for diagnosing causes of isolated chronic cough in patients with normal chest X-rays.
    • Bronchoscopic examination provides limited diagnostic benefit for this specific patient group.