[abstract] CENTRAL NERVOUS SYSTEM REACTIONS DURING HELIOX AND TRIMIX DIVES TO 500 MSW, DEEP EX 81

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[abstract] CENTRAL NERVOUS SYSTEM REACTIONS DURING HELIOX AND TRIMIX DIVES TO 500 MSW, DEEP EX 81

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Title: [abstract] CENTRAL NERVOUS SYSTEM REACTIONS DURING HELIOX AND TRIMIX DIVES TO 500 MSW, DEEP EX 81
Author: Vaernes, R; Hammerborg, D; Ellertsen, B; Peterson, R; Tanjum, S
Abstract: Two groups of divers were compressed to 500 msw with heliox (N=3) and trimix (N=3). They were followed with repeated neuropsychological and neurological tests during compression, at stable intermediate depths, and at 500 msw. For the heliox qroup there was a marked increase in tremor and EEG slow waves and reduction in handgrip strength. For the trimix group the tremor increase did not occur, but the EEG changes were the same as in the heliox group. On motor tests only the trimix group showed impaired finger dexterity and manual dexterity. The same occurred for fine visualmotor coordination, but both groups had increased intentional tremor. On cognitive tests the same difference occurred. The trimix group was markedly impaired on reasoning and long-term memory, while only a mild impairment was found in the heliox group. Dizziness and other HPNS symptoms occurred in both groups. Conclusion: There were marked HPNS effects during compression for both groups. Only tremor was inhibited by the nitrogen. In addition, the trimix group was impaired due to nitrogen narcosis. These data indicated that 10% nitrogen did not inhibit HPNS effects during compression to 500 msw, but the considerable differences between subjects shows that susceptibility to compression must be an important area for future research.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held June 1-5,1982 in Norfolk, Virginia (http:www.uhms.org).
URI: http://archive.rubicon-foundation.org/5870
Date: 1982

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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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