[abstract] REWARMING EXPERIENCES WITH HYPOTHERMIC SCUBA DIVERS

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[abstract] REWARMING EXPERIENCES WITH HYPOTHERMIC SCUBA DIVERS

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Title: [abstract] REWARMING EXPERIENCES WITH HYPOTHERMIC SCUBA DIVERS
Author: Strauss, MB; Vaughan Jr, WS
Abstract: Twenty U.S. Navy combat swimmers exposed to 4.5 C water at 2 to 5 meter depths in wet submersible operations of 4 to 6 hour durations were studied. Core temperatures were measured with temperature sensitive endoradiosonde pills. End exposure core temperature declines ranged from 0.3 C after 4 hour exposures to 1.4 C after six hour exposures. Rewarming was by immersion in 40 C water or exposure to 38 C air after wet suit removal, drying, and donning a cotton sweat suit and wool blanket. Mean temperature afterdrops during rewarming in water measured 0.1 C 0.3 C, and 0.4 C after the 4, 5, and 6 hour exposures respectfully. The nadir temperature afterdrop occurred ten minutes after rewarming commenced. Core temperatures returned to normal between 35 and 40 minutes after rewarming began. Mean core temperature decline after 5 hour exposures with an hour surface interval at hour 3 was 0.4 C. The mean core temperature afterdrop whether rewarmed in hot water or hot air in this scenario was 0.5 C. The nadir temperature occurred after 13.1 minutes in water and 14.6 minutes in air (p is greater than 0.01). Time to reestablish normal body temperature averaged 31 minutes after rewarming in water and 52 minutes in air. These differences were highly significant (p is less than 0.005). Conclusions: 1) Core temperature afterdrops occur consistently during rewarming of immersion-induced hypothermic subjects. 2) The nadir afterdrop temperature occurs approximately 15 minutes after rewarming commences whether rewarmed in water or air. 3) Temperature afterdrop is no greater during rewarming in air than water. 4) Reestablishment of core temperatures to normal takes 1.67 times as long in air as water. 5) Subjectively, the subjects felt warm and comfortable shortly after the nadir temperature afterdrop occurred, but much before normothermia.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held May 25-29, 1981. The Asilomar Conference Center, Pacific Grove, California (http:www.uhms.org)
URI: http://archive.rubicon-foundation.org/4574
Date: 1981

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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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