[abstract] WORKING IN WATER FOR 4 HOURS AT 350 MSW ON HELIOX: AN ANALYSIS OF DIVER PERFORMANCE AS A FUNCTION OF HPNS, BODY TEMPERATURE, LOCKOUT TIME, AND NUMBER OF LOCKOUTS.

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[abstract] WORKING IN WATER FOR 4 HOURS AT 350 MSW ON HELIOX: AN ANALYSIS OF DIVER PERFORMANCE AS A FUNCTION OF HPNS, BODY TEMPERATURE, LOCKOUT TIME, AND NUMBER OF LOCKOUTS.

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Title: [abstract] WORKING IN WATER FOR 4 HOURS AT 350 MSW ON HELIOX: AN ANALYSIS OF DIVER PERFORMANCE AS A FUNCTION OF HPNS, BODY TEMPERATURE, LOCKOUT TIME, AND NUMBER OF LOCKOUTS.
Author: Vaernes, R; Pasche, A; Segadal, K; Lindrup, A; Eines, L
Abstract: In two trial dives six divers were compressed on heliox to 350 msw (N=12). During 5 days at 350 msw, 19 lockout dives were carried out in the first trial, and 37 lockout dives in the second trial dive during 12 days. The divers went through a standard procedure involving manual work, quantified heavy arm and leg work, and testing of motor and cognitive performance. Body core, skin, inspired gas and hot-water suit temperatures were monitored. Diver status was monitored four times during the lockout period. The divers showed some decrease in work rate as compared to the pre-dive control results on the pipeline and valve tasks. It was mostly marked on the first lockouts, with a stabilization just below predive values throughout the rest of the bottom period. On performance tests there were no progressive impairment throughout the lockout period or the bottom period for the 2 trial dives. Furthermore, there were no combined effect of lockout time and numbers of lockouts on performance. For the arm and leg work all divers completed the maximum criteria both at 5 msw and 350 msw. None of the 56 lockout dives were aborted before scheduled time because of hypothermia. However, considerable temperature drops on body surface occurred as a result of uneven hot water distribution in the suit. In one dive undetected hypothermia developed as a result of insufficient breathing gas heating. Conclusion: There were minor impairments because of HPNS. Performance was impaired on the first dives at 350 msw, but after very few dives the divers coped with this new condition, and the performance levels normalized within the normal predive variation range for the majority of tests. No effect of lockout time and numbers of lockouts were found on performance.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held May 29-June 2, 1984. The Gunter Hotel, San Antonio, Texas (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/5344
Date: 1984

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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