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Title: The long-term stability of portable spirometers used in a multinational study of the prevalence of chronic obstructive pulmonary disease
Authors: Pérez-Padilla, Rogelio
Vazquez-Garcia, Juan Carlos
Marquez, Maria Nelly
Jardim, José Roberto de Brito [UNIFESP]
Pertuze, Julio
Lisboa, Carmen
Muino, Adriana
Lopez, Maria Victorina
Talamo, Carlos
Montes de Oca, Maria
Valdivia, Gonzalo
Menezes, Ana Maria Baptista [UNIFESP]
Inst Nacl Enfermedades Resp
Univ Republica
Universidade Federal de São Paulo (UNIFESP)
Pontificia Univ Catolica Chile
Univ Cent Venezuela
Univ Fed Pelotas
Keywords: spirometry
quality control
pulmonary function tests
Issue Date: 1-Oct-2006
Publisher: Daedalus Enterprises Inc
Citation: Respiratory Care. Irving: Daedalus Enterprises Inc, v. 51, n. 10, p. 1167-1171, 2006.
Abstract: 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: Sao Paulo, Brazil; Mexico City, Mexico; 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 (Sao 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.
ISSN: 0020-1324
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Appears in Collections:Artigo

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