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Kruizinga MD, Essers E, Stuurman FE, Zhuparris A, van Eik N, Janssens HM, Groothuis I, Sprij AJ, Nuijsink M, Cohen AF, Driessen GJA. Technical validity and usability of a novel smartphone-connected spirometry device for pediatric patients with asthma and cystic fibrosis. Pediatr Pulmonol 2020; 55:2463-2470. [PMID: 32592537 PMCID: PMC7496177 DOI: 10.1002/ppul.24932] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/25/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND Diagnosis and follow-up of respiratory diseases traditionally rely on pulmonary function tests (PFTs), 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. METHODS Device variability was tested with a calibrated syringe. About 90 subjects, aged 6 to 16, were included in a prospective cohort study. Fifty-eight subjects performed conventional spirometry and subsequent Air Next spirometry. The bias and the limits of agreement between the measurements were calculated. Furthermore, subjects used the device for 28 days at home and completed a subject-satisfaction questionnaire at the end of the study period. RESULTS Interdevice variability was 2.8% and intradevice variability was 0.9%. The average difference between the Air Next and conventional spirometry was 40 mL for forced expiratory volume in 1 second (FEV1) and 3 mL for forced vital capacity (FVC). The limits of agreement were -270 mL and +352 mL for FEV1 and -403 mL and +397 mL for FVC. About 45% of FEV1 measurements and 41% of FVC measurements at home were acceptable and reproducible according to American Thoracic Society/European Respiratory Society criteria. Parents scored difficulty, usefulness, and reliability of the device 1.9, 3.5, and 3.8 out of 5, respectively. CONCLUSION The Air Next device shows validity for the measurement of FEV1 and FVC in a pediatric patient population.
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Affiliation(s)
- Matthijs D Kruizinga
- Centre for Human Drug Research, Leiden, The Netherlands.,Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands.,Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus Medical Centre/Sophia Children's Hospital, University Hospital Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Leiden University Medical Centre, Leiden, The Netherlands
| | - Esmée Essers
- Centre for Human Drug Research, Leiden, The Netherlands.,Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands
| | - F E Stuurman
- Centre for Human Drug Research, Leiden, The Netherlands.,Department of Clinical Pharmacology and Toxicology, Leiden University Medical Centre, Leiden, The Netherlands
| | | | - Nellie van Eik
- Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands
| | - Hettie M Janssens
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus Medical Centre/Sophia Children's Hospital, University Hospital Rotterdam, Rotterdam, The Netherlands
| | - Iris Groothuis
- Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands
| | - Arwen J Sprij
- Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands
| | - Marianne Nuijsink
- Juliana Children's Hospital, HAGA Teaching Hospital, The Hague, The Netherlands
| | - Adam F Cohen
- Centre for Human Drug Research, Leiden, The Netherlands.,Department of Internal Medicine, Leiden University Medical Centre, Leiden, The Netherlands
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