Impulse Oscillometry as an Alternative Lung Function Test for Hospitalized Adults.

Background: Impulse oscillometry (IOS) is a noninvasive technique that measures lung physiology independently of patient effort. In the present study, we aimed to investigate the utility of IOS parameters in comparison with pulmonary function testing (PFT) among hospitalized subjects, with emphasis on obstructive and small airway diseases.

Methods: Sixty-one subjects hospitalized either with unexplained dyspnea or for pre-surgery evaluation were included in the study.