| Effect of oxygen tension and rate of pressure reduction during decompression on central gas bubbles. | |
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MedLine Citation:
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PMID: 9451656 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Reduction in ascent speed and an increase in the O2 tension in the inspired air have been used to reduce the risk for decompression sickness. It has previously been reported that decompression speed and O2 partial pressure are linearly related for human decompressions from saturation hyperbaric exposures. The constant of proportionality K (K = rate/partial pressure of inspired O2) indicates the incidence of decompression sickness. The present study investigated the relationship among decompression rate, partial pressure of inspired O2, and the number of central gas bubbles after a 3-h dive to 500 kPa while breathing nitrox with an O2 content of 35 kPa. We used transesophageal ultrasonic scanning to determine the number of bubbles in the pulmonary artery of pigs. The results show that, for a given level of decompression stress, decompression rate and O2 tension in the inspired air can be traded off against each other by using pulmonary artery bubbles as an end point. The results also seem to confirm that decompressions that have a high K value are more stressful. |
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Authors:
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R E Reinertsen; V Flook; S Koteng; A O Brubakk |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 84 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1998 Jan |
Date Detail:
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Created Date: 1998-03-20 Completed Date: 1998-03-20 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 351-6 Citation Subset: IM; S |
Affiliation:
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Department of Extreme Work Environment, Stiftelsen for Industriell og Teknisk Forskning ved Norges Tekniske Høgskole (SINTEF) Unimed, Trondheim, Norway. randi.reinertsen@unimed.sintef.no |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Atmospheric Pressure* Blood Gas Analysis Body Temperature / physiology Decompression Sickness / blood, physiopathology*, ultrasonography Electrocardiography Embolism, Air / physiopathology, ultrasonography Female Male Oxygen / blood*, chemistry Pulmonary Artery / physiopathology, ultrasonography Swine |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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