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Lung Function Tests

 
 
 
Spirometry
Graphs
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.
 
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