An evaluation of the Breath-Taker peak flow meter.

The Medical Journal of Australia
J J PrettoR J Pierce

Abstract

This study was designed to evaluate the Breath-Taker peak flow meter, recently released by the Asthma Foundation of Victoria. The performance characteristics of five Breath-Taker units were compared with those of five Wright and five mini-Wright peak flow meters. The between-unit reproducibility of each type of peak flow meter was measured using an explosive decompression device with a peak flow reproducibility of better than 1%. Each individual meter was used to measure the peak flow delivered by the decompression device three times for each of six flow rates (97-622 L/min). The coefficient of variation (CV) was lowest for the Wright meters (mean CV, 4.8%) and, similarly to the Breath-Taker units (mean CV, 8.4%), this decreased with increasing flow. The CV of the mini-Wright meters, however, increased as flow increased (mean CV, 7.5%). The Breath-Taker meter had less inter-unit variability than the mini-Wright meter at peak flows above 200 L/min. The accuracy of the three meter types was assessed by comparing measurements of peak expiratory flow rate (PEFR) made with each type and also with a computerized pneumotachograph system in 30 subjects with various degrees of irreversible airflow obstruction. Each subject performed at ...Continue Reading

References

Dec 4, 1976·Lancet·S P HayduD T Hughes
Feb 1, 1979·Thorax·W H PerksK Prowse
Dec 9, 1978·British Medical Journal·B M Wright
Apr 1, 1977·British Journal of Diseases of the Chest·T J Clark, M R Hetzel
Apr 1, 1975·Thorax·A BhoomkarE Hills

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Citations

Jul 16, 1990·The Medical Journal of Australia·K W Drew
Oct 1, 1994·Australian and New Zealand Journal of Medicine·R E Ruffin, R J Pierce

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