Concordance between the Piko - 1(R) portable device and pneumotachography in measuring PEF and FEV1 in asthmatic children

ABSTRACT

Objective: To assess concordance in the measurement of peak expiratory flow (PEF) and forced expiratory volume in one second (FEV1) between the portable device Piko-1 (Ferraris) and a pneumotachograph. Patients and methods: Forced spirometry (Master Screen Jaeger) was performed according to ATS/ERS norms, selecting the best value of three curves, and three measurements with the Piko-1 were recorded, following the recommendations of the manufacturer. Results. Eighty patients between 5–18 years of age were studied. Based on the Bland-Altman method, the mean differences obtained were 9.82 (95%CI 2.43–17.21) for PEF and 0.17 (95%CI 0.12–0.21) for FEV1. The intraclass correlation coefficient was 0.96 (p<0,001; 95%CI 0.93–0.97) for FEV1 and 0.93 (p<0,001; 95%CI 0.89–0.95) for PEF. Conclusions: Piko-1 offers FEV1 measurements close to those obtained with forced spirometry, thus allowing more exact patient assessment in home-based follow-up, emergency services, or hospital wards (AU)

RESUMEN

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