Document Detail

Large capillary fluid permeability in skeletal muscle and skin of man as a basis for rapid beneficial fluid transfer between tissue and blood.
MedLine Citation:
PMID:  1481688     Owner:  NLM     Status:  MEDLINE    
Our previous studies strongly indicate that the capillary filtration coefficient (CFC) in skeletal muscle and skin of man is much larger than previously believed, or about 0.050 ml min-1 100 ml-1 mmHg-1. The hypothesis that this large capillary fluid permeability is a factor of primary importance for plasma volume control was approached. Experimental hypovolaemia induced by lower body negative pressure (LBNP of 70-95 cmH2O) was associated with a rapid net fluid gain from the studied upper arm into the circulation of 0.17 ml min-1 100 ml-1 tissue. The transcapillary driving force for this fluid transfer, probably caused by adrenergic adjustment of vascular resistance, with a decline of capillary pressure, was relatively small, or 1.7 mmHg on average. CFC was instead very high during LBNP, increasing from a control value of 0.054 +/- 0.004 (SE) to no less than 0.097 +/- 0.007 ml min-1 100 ml-1 mmHg-1, probably reflecting an increased number of effectively perfused capillaries. It is suggested that the large capillary fluid permeability in skeletal muscle and skin of man, with large tissue mass and fluid reservoir, may be of great functional importance for plasma volume control after blood loss and also in other (patho)physiological situations. As demonstrated, it can thus permit rapid transfer of large fluid volumes into the circulation and, perhaps of special importance, with only small transcapillary driving force (capillary pressure decline).(ABSTRACT TRUNCATED AT 250 WORDS)
T Länne; H Edfeldt; S Quittenbaum; J Lundvall
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta physiologica Scandinavica     Volume:  146     ISSN:  0001-6772     ISO Abbreviation:  Acta Physiol. Scand.     Publication Date:  1992 Nov 
Date Detail:
Created Date:  1993-02-09     Completed Date:  1993-02-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370362     Medline TA:  Acta Physiol Scand     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  313-9     Citation Subset:  IM; S    
Department of Clinical Physiology, Malmô General Hospital, Sweden.
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MeSH Terms
Blood Pressure / physiology
Body Fluids / physiology*
Capillaries / metabolism*
Erythrocytes / metabolism
Lower Body Negative Pressure
Muscles / blood supply,  metabolism*
Organ Size / physiology
Skin / blood supply,  metabolism*

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