SUBJECTIVE AND BEHAVIORAL EFFECTS ASSOCIATED WITH REPEATED EXPOSURE TO NARCOSIS

Authors
  1. Hamilton, K.
  2. Laliberte, M-F.
  3. Heslegrave, R.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Beyond 30 m nitrogen narcosis can severely degrade the performance of air breathing divers. However, within the diving community it is generally thought that this effect can be reduced by repeating deep air dives on successive days. Unfortunately, laboratory studies have found no strong evidence to support the notion of adaptation to narcosis, and one possible explanation for this discrepancy is that perceptions of narcosis may decrease during repeated exposure to hyperbaric air without parallel improvement on task performance. To examine this possibility, symptomatology and performance were examined over the course of 5 days of repeated exposure to 30% nitrous oxide at 1 ATA. The results revealed a tendency for global perceptions of narcosis to decrease across days, however, an adjective checklist indicated that only some narcotic symptoms showed clear signs of adaptation. TRUNCATED
Report Number
DCIEM-91-85 — Reprint; Research Paper
Date of publication
15 Jan 1992
Number of Pages
5
Reprinted from
Aviation, Space, and Environmental Medicine, vol 63, 1992, p 865-869
DSTKIM No
92-03813
CANDIS No
127159
Format(s):
Hardcopy;Originator's fiche received by DSIS

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