Document Detail


The effects of changes in haematocrit on the intrarenal distribution of blood flow in the dog's kidney.
MedLine Citation:
PMID:  5767886     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. The effect of changes in the haematocrit of blood perfusing the kidney on its intrarenal distribution was studied in dogs.2. Two types of preparations were employed. (i) In the isolated perfused kidney evidence is presented that flow in the autoregulating preparation represents predominantly cortical flow while flow in the ;low flow non-autoregulating' kidney reflects medullary flow. (ii) In the intact kidney renal blood flow rate and its intrarenal distribution was studied by the injection of (133)Xe into the renal artery and measuring its clearance from the kidney by an external counter.3. In both types of preparation cortical flow was found to be independent of changes in P.C.V. but medullary flow varied inversely with haematocrit.4. A change in the haematocrit of the perfusing blood leads to alteration of its viscosity. It was argued that an increase in viscosity must lead to a reduction in the resistance of the cortical afferent arterioles but that medullary afferent arterioles were not able to respond in this manner.5. These findings demonstrate that changes in total body haematocrit cause a redistribution of blood flow between renal cortex and medulla.
Authors:
F S Nashat; F R Scholefield; J W Tappin; C S Wilcox
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  The Journal of physiology     Volume:  201     ISSN:  0022-3751     ISO Abbreviation:  J. Physiol. (Lond.)     Publication Date:  1969 May 
Date Detail:
Created Date:  1969-06-25     Completed Date:  1969-06-25     Revised Date:  2010-09-10    
Medline Journal Info:
Nlm Unique ID:  0266262     Medline TA:  J Physiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  639-55     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Hematocrit*
Hemodynamics
Kidney / blood supply*
Kidney Function Tests
Perfusion
Radioisotopes
Regional Blood Flow
Viscosity
Xenon
Chemical
Reg. No./Substance:
0/Radioisotopes; 7440-63-3/Xenon
Comments/Corrections

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


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