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  • Title: Changes in pulmonary function after naturally acquired respiratory infection in normal persons.
    Author: O'Connor SA, Jones DP, Collins JV, Heath RB, Campbell MJ, Leighton MH.
    Journal: Am Rev Respir Dis; 1979 Nov; 120(5):1087-93. PubMed ID: 507524.
    Abstract:
    Changes in pulmonary function due to naturally occurring respiratory tract infection were examinated in 26 normal healthy volunteers during a period of 6 months. Forced expiratory maneuvers in each volunteer were recorded at 2-wk intervals throughout the study and daily during illness. Significant impairment of peak expiratory flow rate, forced vital capacity, forced expiratory volume in one second, and maximal mid-expiratory flow rate at 50% of the vital capacity was observed during infection, whereas changes in the maximal expiratory flow rate at 75% of vital capacity were nonsignificant. From these results, we conclude that large airways are certainly affected during uncomplicated respiratory infections in normal healthy persons and from the changes observed in FVC we suggest that more widespread involvement of the small airways may occur.
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