RT Journal Article
SR Electronic
T1 The Long-Term Stability of Portable Spirometers Used in a Multinational Study of the Prevalence of Chronic Obstructive Pulmonary Disease
JF Respiratory Care
FD American Association for Respiratory Care
SP 1167
OP 1171
VO 51
IS 10
A1 Pérez-Padilla, Rogelio
A1 Vázquez-García, Juan Carlos
A1 Márquez, María Nelly
A1 Jardim, José Roberto B
A1 Pertuzé, Julio
A1 Lisboa, Carmen
A1 Muiño, Adriana
A1 López, María Victorina
A1 Tálamo, Carlos
A1 de Oca, María Montes
A1 Valdivia, Gonzalo
A1 Menezes, Ana Maria B
A1 the Latin American COPD Prevalence Study (PLATINO) Team
YR 2006
UL http://rc.rcjournal.com/content/51/10/1167.abstract
AB BACKGROUND: We report the performance of an ultrasound-based portable spirometer (EasyOne) used in a population-based survey of the prevalence of chronic obstructive pulmonary disease, conducted in 5 Latin American cities: São Paulo, Brazil; México City, México; Montevideo, Uruguay; Santiago, Chile; and Caracas, Venezuela (the Latin American COPD Prevalence Study [PLATINO]). METHODS: During the survey period (which ranged from 3 months to 6 months in the various locations) we collected daily calibration data from the 70 EasyOne spirometers used in the 5 survey cities. The calibrations were conducted with a 3-L syringe, and the calibration data were stored in the spirometer's database. RESULTS: Ninety-seven percent of the calibration volumes were within ± 64 mL (2.1%) of the 3-L calibration signal. Excluding data from the first city studied (São Paulo), where one calibration syringe had to be replaced, 98% of the calibration checks were within ± 50 mL (1.7%). The measured volume was affected only minimally by the syringe's peak flow or emptying time. CONCLUSION: In these 70 EasyOne spirometers neither calibration nor linearity changed during the study. Such calibration stability is a valuable feature in spirometry surveys and in the clinical setting.