Human Decompression Trial in Nitrogen-Oxygen Diving.
Interim rept. Jan 83-Aug 86,
NAVAL MEDICAL RESEARCH INST BETHESDA MD
Pagination or Media Count:
A trial was performed to assess the relative risks of oxygen and nitrogen in human no-decompression dives. Dives n477 were performed with subjects breathing mixtures with low or high oxygen partial pressures. Dives were 30, 60, or 240 min in duration to various depths chosen by a sequential dose-response format. Despite exceeding the currently accepted safe limite by more than 20, the incidence of demonstrable DCS was under 3. Another 3 had ambiguous symptoms. An increase in DCS risk with higher N2 pressure could not be strongly demonstrated. Oxygen had less than half of the DCS risk associated with nitrogen. Keywords decompression sickness diving mathematical modeling human trial sequential trial.
- Stress Physiology