What is the accuracy of pulmonary function tests in the evaluation of pediatric asthma?

Updated: Jan 08, 2019
  • Author: Girish D Sharma, MD, FCCP, FAAP; Chief Editor: Kenan Haver, MD  more...
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Results of pulmonary function testing are not reliable in patients younger than 5 years. In young children (3-6 y) and older children who are unable to perform the conventional spirometry maneuver, newer techniques, such as measurement of airway resistance using impulse oscillometry system, are used. Measurement of airway resistance before and after a dose of inhaled bronchodilator may help to diagnose bronchodilator-responsive airway obstruction.

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