Document Detail


Efferent phrenic nerve activity during induced changes in arterial pressure.
MedLine Citation:
PMID:  3098269     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Efferent activity in the phrenic nerve was recorded during induced hypotension and hypertension in anaesthetized, paralysed, artificially ventilated dogs. Changes in arterial pressure were induced with infusions of sodium nitroprusside, noradrenaline and angiotensin II, after which ventilation was adjusted to return the PaCO2 near to control values. The PaO2 was maintained above chemoreceptor threshold throughout. When a steady state was achieved quantitative measurements of phrenic nerve activity were made. In six dogs an increase in mean arterial pressure from 114 to 167 mm Hg caused a mean reduction of phrenic nerve activity of 28%. In six dogs a decrease in mean arterial pressure from 128 to 82 mm Hg caused an increase in phrenic nerve activity of 22%. This shows that the reduction in arterial pressure induced by vasodilator drugs causes a major sustained stimulus to respiration, while increase in arterial pressure causes marked respiratory depression.
Authors:
E M Grundy; M K Chakrabarti; J G Whitwam
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British journal of anaesthesia     Volume:  58     ISSN:  0007-0912     ISO Abbreviation:  Br J Anaesth     Publication Date:  1986 Dec 
Date Detail:
Created Date:  1987-02-19     Completed Date:  1987-02-19     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1414-21     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Action Potentials / drug effects
Angiotensin II / pharmacology
Animals
Blood Pressure* / drug effects
Carbon Dioxide / blood
Dogs
Hydrogen-Ion Concentration
Intermittent Positive-Pressure Ventilation
Nitroprusside / pharmacology
Norepinephrine / pharmacology
Oxygen / blood
Phrenic Nerve / physiology*
Chemical
Reg. No./Substance:
11128-99-7/Angiotensin II; 124-38-9/Carbon Dioxide; 15078-28-1/Nitroprusside; 51-41-2/Norepinephrine; 7782-44-7/Oxygen

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


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