Impulse oscillometry in the evaluation of non-cystic fibrosis bronchiectasis in adults: A systematic literature review

Background Non-cystic fibrosis bronchiectasis (NCFB) is a chronic respiratory disease marked by irreversible airway dilation, persistent inflammation, and recurrent infections. Impulse oscillometry (IOS) assesses lung function non-invasively, particularly in patients unable to perform spirometry, but its role in NCFB remains underexplored.