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  • Title: [Measurement of respiratory resistance in healthy persons in the winter of 1985/86 and in January/February 1987].
    Author: Wichmann HE, Sugiri D, Herold G, Knülle E.
    Journal: Zentralbl Bakteriol Mikrobiol Hyg B Umwelthyg Krankenhaushyg Arbeitshyg Prav Med; 1988 Jan; 185(4-5):509-19. PubMed ID: 3131994.
    Abstract:
    From November to May 1986 oscillatory resistance Ros was measured 6 times in 72 healthy persons in Cologne. Every person was examined at a fixed time of day, respiratory symptoms and bronchopulmonary diseases were considered. Seasonal fluctuations of resistance were found, with slightly elevated values in autumn and spring compared to the winter. Regression analysis showed a decrease of the mean and range of resistance with increasing height and a slight increase in smokers. There was no relation between the seasonal pattern of resistance and the air pollutants, as expected due to relatively low ambient concentrations. When in January 1987 ambient pollution increased, the investigation was repeated on Jan 21, 1987, the day with the highest concentration (daily average of SO2: 256 micrograms/m3). In February control investigations were performed. The resistance was significantly elevated in January 1987 compared to February 87 or to January 86. These results agree with those of other authors, who found a slight impairment of lung function in healthy persons when daily averages of SO2 concentrations exceeded 250 micrograms/m3. However, changes of the same or a greater extent may be caused by meteorological factors.
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