Measurement of Peak Expiratory Flow Rate with a Whistle

Journal/Book: Reprinted from the BRITISH MEDICAL JOURNAL 30 October 1965 2 1040-1041. 1965;

Abstract: E. F. DE BONO * M.A. M.D. B.SC. D.PHIL. PH.D. *Medical Unit St. Thomas's Hospital London. Present address: Department of Investigative Medicine University of Cambridge. Summary A simple pocket-size plastic whistle was designed to give an idea of the extent of airway obstruction in respiratory disease by estimating peak expiratory air flow rates. The whistle was compared with the Wright peak flow meter by means of estimations carried out on 100 unselected out-patients at St. Thomas's Hospital. Up to 300 litres a minute the whistle appeared to give a satisfactory response ; above this value underestimation occurs. The whistles and mouthpieces were kindly supplied by Airmed Ltd. of Harlow Essex. ___MH

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