Oscillometry bronchodilator response in adult moderate to severe eosinophilic asthma patients: a prospective cohort study

Key messages• FEF25-75 and oscillometry demonstrate greater percentage improvements in bronchodilator response than FEV1 in moder severe asthma.• Standardized response means for FEV1 and oscillometry were highly sensitive.• Oscillometry can be used as a viable alternative in patients unable to perform spirometry