| Blood volume reduction counteracts fluid shifts in water immersion. | |
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MedLine Citation:
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PMID: 8431188 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Six healthy men were bled by 15% of their total blood volume (TBV) before 7 h of seated water immersion to test the hypothesis that some of the major physiological responses to an expansion of central blood volume can be counteracted by prior reduction of TBV. Subjects were their own controls under two conditions: seated dry in air and seated immersed to the suprasternal notch in water. Immersion without prior reduction of TBV (WC = Wet Control) caused a statistically significant 22% increase in cardiac output (CO), 368% increase in urine production, and 200% increase in sodium excretion relative to dry control (DC) sessions. When TBV was reduced before immersion, CO was the same as during DC sessions; however there were significant increases above DC in urine flow (+73%) and sodium excretion (+120%), although they were significantly reduced from WC values. Potassium excretion was similar during DC and WC sessions, but was significantly increased (+75%) when subjects were immersed after 15% reduction of TBV. |
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Authors:
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K E Simanonok; E Bernauer |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 64 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 1993 Feb |
Date Detail:
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Created Date: 1993-03-05 Completed Date: 1993-03-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 139-45 Citation Subset: IM; S |
Affiliation:
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Human Performance Laboratory, University of California, Davis. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Volume / physiology* Body Fluids / physiology* Cardiac Output Gravitation* Hematocrit Hemodilution Humans Immersion* Male Urine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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