Document Detail


An analysis of interstitial fluid pressure in the web of the bat wing.
MedLine Citation:
PMID:  320881     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A mathematical theory of interstitial fluid motion and capillary exchange is developed in order to understand and explain measurements of capillary and interstitial fluid pressure in the bat wing, in which a high degree of vasomotor activity occurs. As a result of precapillary sphincter activity, fluid is alternately filtered and reabsorbed from the capillary, and previous studies of related steady problems by the author suggest that the interstitial fluid pressure should oscillate with time. Wiederhielm and Weston did not observe such fluctuations when they measured tissue pressures near the capillaries. This apparent paradox is resolved in the present paper by including unsteady effects. It is shown that pressure oscillations are predicted, but because of the very high vasomotor frequency they die out within a very short distance from the capillary wall. The capillary pressure measurements of Wiederhielm and Weston are also explained in terms of precapillary sphincter activity.
Authors:
E P Salathe
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.; Review    
Journal Detail:
Title:  The American journal of physiology     Volume:  232     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1977 Mar 
Date Detail:
Created Date:  1977-04-30     Completed Date:  1977-04-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H297-304     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Capillaries / physiology
Chiroptera / physiology*
Extracellular Space / physiology*
Mathematics
Models, Theoretical
Pressure
Time Factors
Wing / blood supply,  physiology*

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


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