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Nasal airflow in inspiration and expiration

Published online by Cambridge University Press:  29 June 2007

Laura Viani ,
Andrew S. Jones  and
Ray Clarke
Laura Viani
Affiliation:
Liverpool
Andrew S. Jones*
Affiliation:
Liverpool
Ray Clarke
Affiliation:
Liverpool
*
A. S. Jones, University Department of Otorhinolaryngology, Royal Liverpool Hospital, PO Box No 147, Prescot Street, Liverpool L69 3BX.
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Abstract

Inspiratory and expiratory airflow rates were measured in 30 subjects during quiet respiration (at a pressure gradient of 150 Pa) and at peak flow rates.

For low flow rates airflow rate was greater for inspiration than for expiration. Conversely at peak flow rates flow was greatest during expiration. Thus there was a reversal in the phase relationship between inspiration and expiration as flow rate increased.

It was also found that peak inspiratory flow rate correlated better with values for nasal resistance than did peak expiratory flow rate. Flow rate measured by rhinomanometry during quiet respiration was more sensitive to physiologically induced changes in nasal resistance than was peak flow rate.

The findings are discussed with reference to previous work on the physiology of nasal airflow.

Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 104 , Issue 6 , June 1990 , pp. 473 - 476
Copyright
Copyright © JLO (1984) Limited 1990

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