Hi. 



ON PULMONARY FUNCTION AND HEART RATE: MAN 



Four trained subjects, seated and breathing air through a face mask from a Pioneer demand valve in a high altitude 

 chamber at simulated altitude of 16,000 feet. After control period of 10 minutes, subjects breathed 6% CO^ in air 

 for 15 minutes, followed by 10-minute recovery period also at Ifa.OOO feet. Values are averages. 



/I/ Alveolar respiratory quotient as calculated by equation from Fenn, W. O. , Rahn. H., and Otis, A. B.. Am. J. 

 Physiol. 146 :639, 1946. /2/Calculated at BTPS. HI Per cent saturation of arterial blood as estimated from alveolar 

 pC02 and p02 with the nomogram of L. J. Henderson, 1928. /4/ Per cent saturation of arterial blood as indicated by 

 the Millikan oximeter. /5/ As per cent of resting heart rate at ground level. Values are averages based on several 

 measurements during each period. 



Contributors : (a) Ivy, A. C, (b) Marbarger, J. P., (c) Swann, H. G., (d) Wechsberg, P. 



Reference : Air Force Tech. Rept. No. 6528, Aug. 1951. 



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