Analysis of tidal breathing profiles in cystic fibrosis and COPD.

Study Objectives: To explore the flow and time domain characteristics of resting tidal airflow profiles in the presence of obstructive airway disease.

Methods: Spirometry was performed on 81 adults and 46 juveniles in the lung function laboratory. All the juveniles had cystic fibrosis (CF), as did some of the adults (n = 25), with the remainder having either healthy lungs or COPD.