Technical validity and usability of a novel smartphone connected spirometry device for pediatric patients with asthma and cystic fibrosis.

Diagnosis and follow-up of respiratory diseases traditionally rely on pulmonary function tests (PFT), which are currently performed in hospitals and require trained personnel. Smartphone connected spirometers, like the Air Next spirometer, have been developed to aid in the home-monitoring of patients with pulmonary disease. The aim of this study was to investigate the technical validity and usability of the Air Next spirometer in pediatric patients.