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Peak nasal inspiratory flow – the plateau effect

Published online by Cambridge University Press:  29 June 2007

R. W. Clarke ,
A. S. Jones  and
H. Richardson
R. W. Clarke*
Affiliation:
Department of Otorhinolaryngology, University of Liverpool, Liverpool.
A. S. Jones
Affiliation:
Department of Otorhinolaryngology, University of Liverpool, Liverpool.
H. Richardson
Affiliation:
Department of Otorhinolaryngology, University of Liverpool, Liverpool.
*
Mr R. W. Clarke, Senior Registrar, Department of Otorhinolaryngology, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JE.
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Abstract

To study the efficacy of peak nasal inspiration flow (PNIF) as a means of recording change in nasal patency 20 subjects were given increasing doses of intranasal 5tometazo1ine. Nasal resistance (NR) and peak nasal inspiratory flow (PNIF) were measured in the resting stateand after each xylometazoline administration. Successive increases in dose caused a progressive decrease in nasal resistance and an increase in PNIF but the change in peak nasal inspiratory flow (PNIF) was much less. Peak nasal inspiratory flow shows a plateau effect as nasal resistance decreases. The reasons for this plateau are discussed in terms of respiratory flow mechanics

Keywords

NoseAirway resistanceFlow meters
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 109 , Issue 5 , May 1995 , pp. 399 - 402
Copyright
Copyright © JLO (1984) Limited 1995

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