Document Detail

Role of a hydrostatic pressure gradient in the formation of early ischemic brain edema.
MedLine Citation:
PMID:  3760039     Owner:  NLM     Status:  MEDLINE    
We studied whether a hydrostatic pressure gradient between arterial blood and brain tissue plays a role in the formation of early ischemic cerebral edema after middle cerebral artery (MCA) occlusion in cats. Tissue pressure, regional CBF, and water content were measured from the cortex in the core and the peripheral zone of brain normally perfused by the MCA. Intraluminal arterial pressure was altered at intervals by inflation of an aortic balloon to vary the blood-tissue pressure gradient in the ischemic zone. Brain water content in the ischemic core, where flow fell to 5.5 ml/100 g/min, increased within 1 h of occlusion. After occlusion tissue pressure rose from 7.95 +/- 0.72 mm Hg at 1 h to 13.16 +/- 1.13 mm Hg at 3 h. When intraluminal pressure was increased, water content increased further, but only at 1 h after occlusion. In the periphery where flow was 18.9 ml/100 g/min during normotension, neither water content nor tissue pressure rose within 3 h of occlusion. Increased intraluminal pressure was accompanied by increased water content only at 3 h. This study indicates that a hydrostatic pressure gradient is an important element in the development of ischemic brain edema, exerting its major effect during the initial phase of the edema process.
S Hatashita; J T Hoff
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism     Volume:  6     ISSN:  0271-678X     ISO Abbreviation:  J. Cereb. Blood Flow Metab.     Publication Date:  1986 Oct 
Date Detail:
Created Date:  1986-10-30     Completed Date:  1986-10-30     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8112566     Medline TA:  J Cereb Blood Flow Metab     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  546-52     Citation Subset:  IM    
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MeSH Terms
Blood-Brain Barrier*
Brain / physiopathology
Brain Edema / etiology*,  physiopathology
Brain Ischemia / etiology*,  physiopathology
Cerebrovascular Circulation
Hydrostatic Pressure*
Grant Support

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

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