Accession Number : AD0728247
Title : Nitrogen-Oxygen Mixture Physiology. End-Tidal Gas Sampling System. Carbon Dioxide Regulation in Divers. Carbon Dioxide Sensitivity Tests.
Descriptive Note : Final rept. on Phase 3,
Corporate Author : NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
Personal Author(s) : Lanphier,E. H. ; Lambertsen,C. J. ; Funderburk,L. R.
Report Date : 30 AUG 1955
Pagination or Media Count : 46
Abstract : Use of an end-tidal gas sampling system with a particular breathing circuit in Phase 2 of this project yielded unusually high 'alveolar' carbon dioxide values in the majority of subjects under a variety of conditions during work. Questions concerning the validity of these measurements led to a study involving simultaneous sampling of arterial blood and subsequent analysis for carbon dioxide tension and other variables. An identical series of runs was conducted for comparision in the same subjects using a totally different respiratory circuit and end-tidal sampler. The results indicated that the high carbon dioxide levels were a reality, accurately reflected by the end-tidal sampler and not brought about by the breathing circuit. The abnormal carbon dioxide levels could be ascribed only to unusual responses in the diver-subjects themselves. The levels were accompanied by corresponding abnormalities in acid-base equilibrium, a definite difference from the norm appears to be characteristic at least of certain divers, and this difference may have important implications. The origin and mechanism are abscure. (Author)
Descriptors : (*CARBON DIOXIDE, DIVING), RESPIRATION, OXYGEN, NITROGEN, PHYSIOLOGY, STRESS(PHYSIOLOGY), GASES, SAMPLING
Subject Categories : Stress Physiology
Distribution Statement : APPROVED FOR PUBLIC RELEASE