A Comparison of the Results of Spirometry Performed on a 10-Year-Old

question 4

Multiple Choice

A comparison of the results of spirometry performed on a 10-year-old before and after administration of a bronchodilator evaluates airway obstruction and assesses reversibility. What spirometry result shows significant reversibility and is diagnostic for asthma?

• A) Increase in the forced vital capacity (FVC) to a normal value for a 10-year-old
• B) Increase in the forced expiratory volume (FEV)1/FEV ratio from 70% to 85% predicted
• C) Increase in the peak flow results of 20% or more
• D) Increase of at least 12% in the FEV1

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