NITROGEN-OKYGEN MIXTURE PHYSIOLOGY Phase 4. Carbon Dioxide Sensitivity as a Potential means of personnel selection Phase 6. Carbon Dioxide Regulation under Diving Conditions

摘要

Resting subjects were exposed t mixtures containing elevated CO2 concentrations until the end expiratory CO2 reached 45,50,55 and 60 mas Hg. The RMV was recorded at each Pco2 level. The end-expiratory Pco2 of subjects swimming at the surface and at depths of 26 ft, and 99 ft. was mass red while breathing air, oxygen, 55% nitrogen -45% oxygen and dead apace was also varied. All individuals demonstrated a tendency to retain carbon dioxide when swimming at moderate depth especially when breathing N2 -O2 mixtures.