Document Detail


Comparison of the effects of positive end-expiratory pressure and jugular venous compression on canine cerebral venous pressure.
MedLine Citation:
PMID:  6380344     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The confluent sinus pressure was measured in eight mongrel dogs in the head-up position to compare the effectiveness of positive end-expiratory pressure (PEEP) and jugular venous compression in increasing cerebral venous pressure. When the head was elevated 30 cm above the heart, confluent sinus pressure decreased from 9.6 +/- 1.8 (mean +/- SEM) to -5.3 +/- 0.5 mmHg. At constant arterial carbon dioxide tension (PaCO2 = 28 +/- 2 mmHg), PEEP (20 cmH2O) did not increase cerebral venous pressure. However, when the jugular veins were compressed with a neck tourniquet with pressures of 20-140 mmHg, cerebral venous pressure increased rapidly. When neck tourniquet pressure was maintained at 40 mmHg, confluent sinus pressure in all dogs was increased and sustained at 2.4 +/- 0.8 mmHg. Carotid artery pressure measured distal to the tourniquet was not altered. The efficacy of extrathoracic venous pressure elevation (neck tourniquet) is greater than intrathoracic (PEEP), and this may relate to the Starling resistor effects of neck veins and the presence of jugular venous valves. We conclude that prophylactic use of PEEP in the prevention of air embolism during the sitting position may not be as effective as jugular venous compression.
Authors:
T Toung; Y K Ngeow; D L Long; M C Rogers; R J Traystman
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Anesthesiology     Volume:  61     ISSN:  0003-3022     ISO Abbreviation:  Anesthesiology     Publication Date:  1984 Aug 
Date Detail:
Created Date:  1984-09-04     Completed Date:  1984-09-04     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  1300217     Medline TA:  Anesthesiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  169-72     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Brain / blood supply*
Dogs
Embolism, Air / prevention & control
Jugular Veins / physiology*
Positive-Pressure Respiration*
Posture
Tourniquets*
Veins / physiology
Venous Pressure
Grant Support
ID/Acronym/Agency:
NS20020/NS/NINDS NIH HHS

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


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