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Lung Function Tests

Lung Volumes
Other Tests

Bronchial Challenge

    • Procedure
    • Histamine or methacholine is given to stimulate bronchoconstriction
    • FEV₁ is measured before and after the dose.
    • Significance
    • Worsening FEV₁ after the stimulus is suggestive of asthma.
  • The test has high negative predictive value, though the positive predictive value is poor as certain other respiratory conditions will result in false positive.