PULMONARY VENTILATORY FUNCTION IN MILITARY RECRUITS DURING HEALTH AND ACUTE VIRAL RESPIRATORY DISEASE, INCLUDING PNEUMONIA

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Abstract
The pulmonary ventilatory function tests of maximal breathing capacity, vital capacity, and 1-sec.and 3-sec. vital capacities were performed serially at 2-to 3-week intervals for 11 weeks in a group of 60 Air Force recruits. Moderately severe acute respiratory disease occurred in 34 men, 14 of whom also had evidence of pulmonary infiltration of mild degree by roentgenographic examination. The remaining 26 men remained free of respiratory infection by the criteria established. The only test that showed significant change at any of the periods of observation was the vital capacity. Although a significant decrease in vital capacity occurred on one occasion in the group without respiratory disease, those patients with pulmonary infiltration showed a more marked decrease during the time of their illness. The reproducibi-lity of the tests, even in the presence of respiratory disease without pneumonia, indicates that considerable confidence can be had that significant variation in the results will not occur in multiple tests in an individual because of technical reasons.

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