Biochemical Comparisons of Two-Hour Exposures to Hydrogen-Oxygen, Helium-Oxygen and Nitrogen-Oxygen Atmospheres at 200 FSWG

摘要: Abstract : Biochemical and hematologic analyses were performed on urine blood samples collected from three civilian divers following exposure for 120 minutes to hydrogen-oxygen, helium-oxygen nitrogen-oxygen breathing mixtures at simulated pressures of 200 feet sea water (FSWG). Normoxic environments maintained except when symptoms hypoxia, which developed in the subjects nitrogen-containing mixtures, relieved by additional oxygen. Biological sampling was possible selected dives during a series two each subject gaseous mixtures. An overall evaluation biochemical signs stress point no greater or somewhat reduced hydrogen-oxygen compared Greatest differences noted earlier phases recovery dives. Measurable biological changes as result diving confounded outward distress such nausea increased frequency decompression sickness. data lend support general medical observation safety under conditions tested. The potential advantage decreased density availability hydrogen helium indicate that further testing hydrogen-containing atmospheres is warranted.