Validation study of the portable Air Next spirometer: preliminary results

Validation study of the portable Air Next spirometer: preliminary results The Air Next Spirometer (Nuvoair, Sweden) is a novel portable device that performs spirometric measurements connected to a smartphone or tablet via Bluetooth. Data in a variety of patients and healthy controls are needed in order to support the use of this spirometer in clinical practice. In this validation study, we perform spirometry in consecutive patients with different spirometric patterns (obstructive and restrictive disorders) and healthy controls. Spirometry is performed with a conventional desktop spirometer (Masterscreen, Jaeger), as well as with the Air Next spirometer. In order to assess the agreement between the two spirometers, the following parameters have been employed: forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), FEV1/FVC ratio and FEF25-75%. The concordance of the aforementioned spirometric values between the two spirometers has been evaluated using Pearson’s and Intraclass Correlation Coefficients (ICC). Currently, 50 subjects with asthma, COPD, interstitial lung disease and healthy controls have been recruited. We observed significant concordance in the measurements of FEV1, FVC, FEV1/FVC ratio and FEF25-75% between the two spirometers (Table 1). Our preliminary results suggest that the spirometric measurements performed with Air Next in a group of patients with various spirometric patterns and healthy individuals are concordant with those of a desktop spirometer. Further validation in a larger dataset is ongoing.