Evaluation of Factors Affecting Peak Expiratory Flow in Healthy Adults: Is It Necessary to Stand Up?

Author： Vaswani Ravi Moy Robert Vaswani Surender

ISSN： 0277-0903

Source： Journal of Asthma, Vol.42, Iss.9, 2005-10, pp. : 793-794

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Abstract

Background . Guidelines for the Diagnoses and Management of Asthma recommend that the peak flow meter should be used in a standing position. Objective . To determine whether the peak expiratory flow (PEF) varies with the position of the subject and to evaluate the impact of application of nose clip on PEF measurement. Methods . Using a Mini Wright Peak Flow Meter, the PEF was measured in 33 healthy adults in sitting and standing positions, with and without application of a nose clip. Each subject blew into the peak flow meter three times and best of the 3 blows was recorded. Results . The PEF was not significantly higher in standing than in sitting position. Application of nose clip had no significant impact on the PEF. Conclusion . The position of the subject and application of nose clip has no significant impact on PEF measurement.