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Related Experiment Videos

Asthma and irreversible airflow obstruction.

P J Brown, H W Greville, K E Finucane

    Thorax
    |February 1, 1984
    PubMed
    Summary
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    Asthma alone can lead to irreversible airflow obstruction, a condition worsened by the duration and severity of the disease. Early intervention to manage persistent asthma may prevent this irreversible lung damage.

    Area of Science:

    • Pulmonary Medicine
    • Respiratory Research

    Background:

    • Chronic asthma can potentially lead to irreversible airflow obstruction.
    • Understanding the factors contributing to irreversible airflow obstruction in asthma is crucial for effective management.

    Purpose of the Study:

    • To investigate if asthma, in isolation, can cause irreversible airflow obstruction.
    • To identify correlations between asthma characteristics and the degree of airflow obstruction.

    Main Methods:

    • A cohort of 89 patients with chronic asthma underwent a four-week treatment regimen including theophylline and a beta agonist.
    • Patients with persistent airflow obstruction (FEV1 < 85% predicted) after two weeks received prednisolone.
    • Spirometry (FEV1) was measured at baseline, two, and four weeks. Asthma duration, severity, and smoking history were recorded.

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    Main Results:

    • A significant mean difference (0.29 L, p < 0.001) was observed between the best FEV1 and predicted normal values, indicating persistent obstruction.
    • Reduced FEV1 percentage predicted correlated significantly with older age (r = -0.30, p < 0.01), longer asthma duration (r = -0.47, p < 0.001), and greater asthma severity (r = -0.55, p < 0.001).
    • These findings persisted even when analyzing non-smokers and adults with adult-onset asthma separately.

    Conclusions:

    • Asthma, independent of other respiratory diseases, can cause irreversible airflow obstruction.
    • The extent of irreversible airflow obstruction is directly related to the duration and severity of the asthma.
    • Minimizing persistent asthma may be a key strategy for preventing irreversible airflow obstruction.