THE RATE OF RESPIRATORY ADJUSMENT TO POSTURAL CHANGE

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Abstract
Continuous collections of expired air were made in a group of 31[male][male] young adult immediately after they had assumed the supine posture, and were continued for 30 mins. The expired air was separated by mercury valves and collected in 9.1 L. Tissot spirometers accurately balanced to reduce back pressure to a minimum. An avg. decrease in respiratory vol. of approx. 40% during the 1st 10 mins. and 10% during the next 10 mins. was found. No significant decrease occurred between the 20th and 30th mins. of rest. No evidence was obtained with successive testing that the rate of stabilization of the respiratory vol. increased, although individual differences were noted. No significant alteration in respiration resulted from the application of a Siebe-Gorman half-mask.

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