Effects of Hand and Foot Heating on Diver Thermal Balance.

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dc.contributor.author Weinberg, RP
dc.contributor.author Thalmann, ED
dc.date.accessioned 2007-04-03T18:49:54Z
dc.date.available 2007-04-03T18:49:54Z
dc.date.issued 1990
dc.identifier.citation ADA226430 en
dc.identifier.govdoc ADA226430
dc.identifier.govdoc NMRI-90-52
dc.identifier.uri http://archive.rubicon-foundation.org/4247
dc.description Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested. en
dc.description.abstract Divers at rest immersed in cold water for long durations wearing passive thermal protection garments are limited by low finger and toe temperatures, which cause pain and numbness before rectal temperatures fall to unsafe levels. It was reasoned that low levels of hand and foot heating might improve diver comfort. Supplemental heating of the hands and feet to maintain finger and toe temperatures between 12 and 18 C (after passive cooling) was employed. A total of 32 divers wearing a dry suit with M-600 Thinsulated undergarments were immersed for periods of up to 8 hours in 3 C water. The divers wore electrical resistance heated gloves and socks over polypropylene liners and under Thinsulated insulation, or warm-water-perfused gloves and socks over polypropylene liners and under foam neoprene insulation. Hands and feet remained dry by communication with the dry suit. Water perfusion rate or electrical power was adjusted to maintain desired digit temperatures. Supplemental heating did not reduce the need for adequate passive whole body thermal insulation for long-duration immersions in cold water. Supplemental heating did reduce hand and foot discomfort at low energy cost, and reduced the decrement in manual dexterity compared to no heating. The low energy cost of resistance heating makes this feasible for immediate use by the Fleet. Keywords: Diving suits; Low temperature; Fingers/feet; Heat balance; Thermal insulation/ underwear; Temperature control; Stress physiology. en
dc.description.sponsorship US NAVY en
dc.format.extent 1965082 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.subject THERMAL STRESSES en
dc.subject thermal protection en
dc.subject COLD REGIONS en
dc.subject Cold/adverse effects en
dc.subject Immersion en
dc.subject human en
dc.subject dry suit en
dc.subject wet suit en
dc.subject DIVING SUITS en
dc.subject electric power en
dc.subject BODY TEMPERATURE en
dc.subject NEOPRENE en
dc.subject underwater en
dc.subject hands en
dc.subject fingers en
dc.subject feet en
dc.subject cooling en
dc.subject divers en
dc.title Effects of Hand and Foot Heating on Diver Thermal Balance. en
dc.type Technical Report en

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