[Agreement between pneumotachograph and PiKo-1 measurements of PEF and FEV1].
OBJECTIVE
To assess how well values for peak expiratory flow (PEF) and forced expiratory volume in 1 second (FEV1) agree when measured with the PiKo-1 device and with a conventional pneumotachograph.


METHODS
This randomized, single-blind study included 40 patients who attended the clinic for lung function testing. The 2 measurement devices were the Masterlab pneumotachograph and the PiKo-1. A correction factor estimated by the manufacturer was applied to the measurements taken with the PiKo-1.


RESULTS
The values obtained with the 2 devices differed by a mean of 5.8218 L/min for PEF (95% confidence interval [CI], -9.4809 to 21.1387) and 0.001 L for FEV1 (95% CI, -0.0616 to 0.0636). The intraclass correlation coefficient was 0.9652 (95% CI, 0.9336-0.9819) for PEF and 0.9876 (95% CI, 0.9761-0.9936) for FEV1.


CONCLUSIONS
The PiKo-1 is a simple and easy-to-use device that can be very useful for monitoring and assessing the severity of obstructive pulmonary diseases. The results must be corrected for altitude and the estimated correction factor should be applied.
Rodríguez-Pascual
L
L
Servicio de Neumología, Hospital General Yagüe, Burgos, Spain. luropa@separ.es
Cordero-Guevara
J
J
Viejo-Bañuelos
J L
JL
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004867:Equipment Design; D005260:Female; D045268:Flowmeters; D005540:Forced Expiratory Flow Rates; D006801:Humans; D008297:Male; D008875:Middle Aged; D012129:Respiratory Function Tests / Q000295:instrumentation; D016037:Single-Blind Method