Total respiratory resistance by forced oscillation in normal subjects.

Abstract:

:Total respiratory resistance (Rrs) was studied by the forced oscillation technique at a frequency of 3 cps in 76 normal subjects (36 men, 40 women), ages 21 to 64 years. Slopes (equivalent to specific conductance) assuming a linear relationship with zero intercept between 1/Rrs and thoracic gas volume (TGV) were computed. In women, expiratory slopes were significantly less than inspiratory slopes; moreover, slopes decreased significantly with height and were significantly less in current smokers. For men, there were no consistently significant relationships between slopes and phase, age, height, weight, or smoking habits. Predicted resistance and estimates of the 5th and 95th percentiles of inspiratory, expiratory, and average resistance are presented for all men combined and for currently nonsmoking women. The fact that, in contrast to men, asymptomatic, current women smokers showed an elevation in Rrs when compared to nonsmoking women merits further study.

journal_name

Mayo Clin Proc

journal_title

Mayo Clinic proceedings

authors

Jiemsripong K,Hyatt RE,Offord KP

subject

Has Abstract

pub_date

1976-09-01 00:00:00

pages

553-6

issue

9

eissn

0025-6196

issn

1942-5546

journal_volume

51

pub_type

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