Comparison of Peak Cough Flows Measured by Pneumotachograph and a Portable Peak Flow Meter

Abstract

PCF measurements made with a portable peak flow meter such as the asmaPLAN+ (Vitalograph, Ennis, Ireland) are reproducible and reasonably accurate when flows are >270 liters/min. However, some caution must be exercised in clinical practice at lower PCF because of the tendency of this portable device to overestimate the lower flows.