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Article
May 1925

THE RESPIRATORY ORGANS IN HEALTH AND IN DISEASE: XVIII. THE VITAL CAPACITY OF THE LUNGS IN CHRONIC FIBROUS PLEURISY, HEALED EMPYEMA AND PULMONARY TUBERCULOSIS BOTH CLINICAL AND NONCLINICAL

Author Affiliations

MINNEAPOLIS

From the department of internal medicine and the department of preventive medicine and public health, University of Minnesota Medical School, and the Parkview Sanatorium.

Arch Intern Med (Chic). 1925;35(5):557-560. doi:10.1001/archinte.1925.00120110023003
Abstract

In an earlier study, it was stated that "groups of cases with evidence of parenchymatous lesions showed reduction in the average vital capacity. The average vital capacity was found to decrease with the extent of disease revealed by the roentgen-ray and physical signs. There was also a decrease in the average vital capacity with increase of symptoms." Since that time, considerable new data have accrued. As the data are treated somewhat differently in this study, we felt that it would be permissible to include some of those used in the earlier study. The vital capacity percentages were taken from tables1 prepared from Dreyer's2 weight formulas and West's3 surface area method.

When 773 cases were grouped according to physical signs, 338 were found to be negative. This group of negative cases presented an average vital capacity of 102.4 per cent. of the theoretical normal. The average percentage of vital capacity previously

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