Diurnal Variation of Respiratory Function, Independent of Air Quality
- 1 March 1973
- journal article
- research article
- Published by Taylor & Francis in Archives of environmental health
- Vol. 26 (3) , 144-152
- https://doi.org/10.1080/00039896.1973.10666242
Abstract
Specific airway conductance was determined every four hours, around the clock, on six normal subjects who were confined to an environmentally controlled chamber for two six-day study periods. In the first study period the subjects breathed clean filtered air the first three days and ambient air the last three days. In the second study the order was reversed: ambient air was breathed the first three days, and clean filtered air the last three days. Temperature, relative humidity, and the sleep-awake cycle were rigidly controlled during both study periods. No meaningful difference between the level or variance of respiratory function was observed between the clean and ambient phases of study. Significant cyclic diurnal variations were observed in all subjects in both studies, with lowest conductance values at 0400 and highest values observed at 1200. A similar diurnal pattern was observed in functional residual capacity being lowest at 2400 and highest at 0800.Keywords
This publication has 7 references indexed in Scilit:
- Effects of Environment on Respiratory FunctionArchives of environmental health, 1970
- Response of Healthy Men to Inhaled Low Concentrations of Gas-Aerosol MixturesArchives of environmental health, 1969
- Relationship of Symptoms of Chronic Bronchitis and Emphysema to Weather and Air PollutionArchives of environmental health, 1968
- Effects of Environment on Respiratory FunctionArchives of environmental health, 1966
- INFLUENCE OF THE WEATHER ON RESPIRATORY AND HEART DISEASEThe Lancet, 1961
- Effect of a previous deep inspiration on airway resistance in manJournal of Applied Physiology, 1961
- A NEW METHOD FOR MEASURING AIRWAY RESISTANCE IN MAN USING A BODY PLETHYSMOGRAPH: VALUES IN NORMAL SUBJECTS AND IN PATIENTS WITH RESPIRATORY DISEASE 1Journal of Clinical Investigation, 1956