[abstract] WATER TEMPERATURES FOR MATCHED COLD EXPOSURES IN DIVERS WITH OR WITHOUT WET SUITS DURING AIR DECOMPRESSION DIVES.

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[abstract] WATER TEMPERATURES FOR MATCHED COLD EXPOSURES IN DIVERS WITH OR WITHOUT WET SUITS DURING AIR DECOMPRESSION DIVES.

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Title: [abstract] WATER TEMPERATURES FOR MATCHED COLD EXPOSURES IN DIVERS WITH OR WITHOUT WET SUITS DURING AIR DECOMPRESSION DIVES.
Author: Doolette, DJ; Gault, KA; Gerth, WA
Abstract: BACKGROUND: Much of the military decompression data used to calibrate probabilistic models was obtained from divers wearing wet suits in cold water (mean 62 ºF). A decompression trial requiring divers dressed in swimsuits and t-shirts necessitated identifying a water temperature to approximate diver thermal exposures in earlier trials because diver thermal status is an important determinant of decompression sickness (DCS) risk. MATERIALS AND METHODS: To represent earlier decompression data, twelve divers wearing 5-7mm neoprene wet suits and immersed in 60 ºF (16 ºC) water in the Ocean Simulation Facility wetpot were compressed to 100 feet of seawater (fsw) at 60 fsw/min, performed intermittent 125 Watt cycle ergometer work during the remaining 28.3 minutes at bottom, and then rested during 99 minutes of decompression. For each diver, skin temperature at four locations was recorded continuously, and subjective thermal status scores from 0 (comfortable) to 10 (unbearably cold) were elicited every 15 minutes. Two days later, eleven of the same divers wearing swimsuit and t-shirts and immersed to 3 fsw in 85 ºF (29 ºF) water performed 115 Watt cycle ergometer work for 30 minutes, and then rested for 180 minutes. Thermal status scores were elicited every 15 minutes. RESULTS: Among divers in wet suits, mean skin temperature stabilized between 80 and 85 ºF after ergometer work. In divers wearing swimsuits and t-shirts mean skin temperature is near water temperature. Under both dive conditions, thermal status scores rose from an initial median of 1 and stabilized at 5 (occasional shivering). Thermal status scores under the different dive conditions were not significantly different during the final 60 minutes of immersion (paired Wilcoxon test). CONCLUSIONS: During prolonged decompression dives, cold stress for divers without wet suits in 85 ºF water is similar to that for divers wearing wet suits in 60 ºF water.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held June 14-16, 2007. Ritz-Carlton Kapalua Maui, Hawaii (http:www.uhms.org)
URI: http://archive.rubicon-foundation.org/5111
Date: 2007

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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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