OXYGEN COST OF BREATHING .1.

Abstract
The results of 58 determinations of the oxygen cost of breathing in 33 normal subjects during hyper-ventilation have been presented. The absolute results and the increments with different levels of ventilation were reasonably comparable to the reported results with more sophisticated techniques. A mean value of 2.55 ml per liter of ventilation with a range of 0.7 to 4.0 included the majority of subjects studied. Among 12 subjects who had multiple determinations, the majority reproduced their original values within 0.5 ml.

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