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Lung Function Tests
 
 
Lung Function Tests
 
 
Pulmonary function tests including spirometry, flow-volume loops, lung volumes and diffusion capacity can be used to diagnose and grade obstructive or restrictive lung disease.
Spirometry
Graphs
Lung Volumes
Other Tests
 
 

Bronchial Challenge

 
 

Overview

    • 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.
Last updated on November 15th, 2017
 
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Associated Diseases
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