Document Detail


Cross-adaptive effects of cold, hypoxia, or physical training on decompression sickness in mice.
MedLine Citation:
PMID:  468699     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of adaptation to cold, hypoxia, or exercise on hyperbaric decompression tolerance were investigated in two factorial experiments. For either 14 or 28 days, groups of mice were handled (control); exposed discontinuously for 4 h to cold (4 degrees C) or hypoxia (P approximately 379 or 320 Torr); or exercised by swimming (15 min at 31 degrees C) or treadmill excursion (8.1 m/min for 1 or 1.5 h). The animals were divided into subgroups, exposed to one of three hydrostatic pressures (7.6--11.1 ATA) for 30 min, decompressed, and observed to determine survival rate or bends incidence (type II decompression sickness). Decompression sickness was significantly reduced (P less than 0.05) in the treadmill-trained animals, was unchanged in cold-exposed and swim-exercised mice, and tended to increase in animals adapted to hypoxia. Enhanced tolerance by treadmill training is presumably due to lean body conformation, which could reduce nitrogen saturation of tissues, and greater muscle capillarization and cardiovascular fitness, which may improve nitrogen elimination. Reduced tolerance with adaptation to hypoxia may be attributed to rheological changes associated with polycythemia, which facilitate bubble production.
Authors:
B A Rattner; S P Gruenau; P D Altland
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  47     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1979 Aug 
Date Detail:
Created Date:  1979-10-24     Completed Date:  1979-10-24     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  412-7     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological*
Animals
Anoxia*
Body Temperature
Body Weight
Cold Temperature*
Corticosterone / blood
Cross Reactions
Decompression Sickness / prevention & control*
Male
Mice
Physical Conditioning, Animal*
Radioimmunoassay
Chemical
Reg. No./Substance:
50-22-6/Corticosterone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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