Operation Everest II. Altitude Decompression Sickness during Repeated Altitude Exposure,
ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
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The incidence of altitude decompression sickness ADS was studied in 23 altitude scientists during repeated altitude exposure to 15-20,000 feet in a decompression chamber. Prior to each altitude exposure, a 30-60 minute prebreathing period with 100 oxygen took place. Ascent was made to an altitude at a rate of 2000 feet per minute. The altitudes studied ranged from 15-29,000 feet. Symptoms reported appear consistent with previous reports with regard to security of symptoms. Incidence of ADS at 26-29,000 feet was 29.7 during 274 change flights and 1264.4 hrs of altitude time. Incidence appeared related to age or body index weightheight2. This high incidence of ADS reported in this study is similar to that reported by NASA. Keywords Bends Altitude and Hypobaric chamber.
- Stress Physiology