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Is spirometry necessary to diagnose and control asthma?

Mani Latifi, MD and Sumita Khatri, MD
Cleveland Clinic Journal of Medicine August 2017, 84 (8) 597-599; DOI: https://doi.org/10.3949/ccjm.84a.16078

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  • TABLE 1

    The patient’s pulmonary function test results

    Predicted normal valueLower limit of normalOur patient’s values
    Before bronchodilator% of predicted normal valueAfter bronchodilatora% of predicted normal valueChange
    FVC3.17 L2.44 L2.66 L84%2.73 L86%3%
    FEV12.61 L/sec1.96 L/sec1.98 L/sec75%2.25 L/sec86%15%b
    FEV1/FVC83.30%72.62%73.67%88%82.41%98%10%

    • ↵a Bronchodilator = 4 puffs of albuterol (360 μg).

    • ↵b Clinically significant based on reversibility guidelines of ≥ 12% of baseline.1,2

    • FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity

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