101. VENTILATION AND GAS EXCHANGE VS EXERCISE AND RECOVERY: MAN 



Data from subjects clinically free of pulmonary or cardiovascular disease and in basal conditions. Values for males 

 and females calculated separately. STPS conditions. [l] Ranges in parentheses conform to estimate "b" of the 95% 



III Lung volumes and maximal breathing capacity determined by spirographic method. Lung volumes, method of 

 Christie [2] , modified by Hurtado and Bailer [3] . For lung volumes, resting pulmonary mid-position is point of 

 reference from which all measurements are taken (position of return end quite expiration). The volume of air con- 

 tained then in the chest is the sum of the reserve and residual airs [2-8] . Maximal breathing capacity apparatus, 

 modified recording spirometer of closed-circuit type derived from Benedict-Roth, calculations at 37 C. ( 9] /2/ 

 Apparatus: tissot gasometer, electrically driven kymograph; Douglas bag interposed through three-way valve into 

 inflow circuit to spirometer; inspiratory flutter valves connected through tube and mouth piece to patient. CO2, 

 O2 determinations by Haldane apparatus. Ill Step up on platform, 20 cm high, and down again at rate of 30 

 cycles/min. /4/ Rate of O^ removal calculated as difference between inspired and expired air O^ concentrations. 



Contributor: (a) Cohn, J. E., (b) Harden, K. A. 

 References : [1] Baldwin, E. de F., Cournand, A., 

 R. v., J. Clin. Invest. _n: 1099, 1932. [3] Hurtado, 

 Schierbeck, K., Acta med. scand. 58:541, 1923. [5] 

 and Brow, G. R., ibid^:677, 1924. [7] Robinson, 

 sprilfung der Atraung, " Leipzig: J. A. Barth, 1937. 



and Richards, D. W., Jr.. Medicine 27:243, 1948. [2] Christie, 

 A., and BoUer, C, ibid 1^:793, 1933. [4] Lundsgaard, C, and 



Binger, C. A., J. Exp. M. 38:445, 1923. [6] Binger, C. A., 

 S., Arbeitsphysiologie J^:3, 1938. [8] Anthony, A. J., "Funktion- 

 [9] Sonne, C, Zschr. ges. exp. Med. 94:13, 1934. 



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