Frequency-dependent compliance at different levels of inspiration in normal adults

Abstract

Measurements of pulmonary compliance have been made at different respiratory frequencies in 11 normal adults. The observations have been carried out at three levels of inspiration, the constancy of the volume of air in the lungs being checked by body plethysmography. Compliance decreased with an increasing respiratory frequency at each level of inspiration. The effect was greatest at the lowest lung volume, and least at the middle lung volume. Variations in respiratory frequency had no significant effect on the pulmonary resistance. lung plethysmograph Submitted on January 31, 1963