Cardiovascular changes after achieving constant effect site concentration of propofol.

Cardiovascular changes after achieving constant effect site concentration of propofol. Research Abstract Details 

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Cardiovascular changes after achieving constant effect site concentration of propofol. Abstract Text:

E S Jack,M Shaw,J M Harten,K Anderson,J Kinsella,E S Jack,M Shaw,J M Harten,K Anderson,J Kinsella,E S Jack,M Shaw,J M Harten,K Anderson,J Kinsella,

Target controlled infusions of propofol use a pharmacokinetic/pharmacodynamic model to calculate an effect site concentration of the drug. We assessed the cardiovascular stability of 10 healthy patients using non-invasive thoracic bioimpedance and their 'depth' of anaesthesia using the Bispectral index after they had been anaesthetised to a constant effect site concentration of propofol (6.5 min from starting). Each patient had no surgical stimulus and received no intravenous fluid during the study period. The patients also received effect site target controlled remifentanil (steady state 2.5 min from starting) and a bolus of vecuronium to facilitate intubation and ventilation. We mathematically calculated when each measured parameter would reach a state of stability (i.e. with 95% certainty). Heart rate levelled off at 20 min, Bispectral index at 32 min, and cardiac index and mean arterial pressure at 47 min after achieving effect site stability, the final levels being, respectively, 21%, 47%, 14% and 28% lower than those at effect site stability. We conclude that cardiovascular parameters continue to change to a clinically significant degree after achieving a constant effect site concentration of propofol via target controlled infusions.

Cardiovascular changes after achieving constant effect site concentration of propofol. Publishing Authors By Initials

ES Jack,M Shaw,JM Harten,K Anderson,J Kinsella,ES Jack,M Shaw,JM Harten,K Anderson,J Kinsella,ES Jack,M Shaw,JM Harten,K Anderson,J Kinsella,

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Cardiovascular changes after achieving constant effect site concentration of propofol. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Anaesthesia

VOLUME: 63

Page Numbers: 116-20

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ISSN: 1365-2044

DAY: 23

MONTH: Feb

YEAR: 2008

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LANGUAGE: eng

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Grant and Affiliation Information for Cardiovascular changes after achieving constant effect site concentration of propofol.

AFFILIATION: Department of Anaesthesia, Stirling Royal Infirmary, Livilands, Stirling, FK8 2AU, UK.

Country: England

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MEDLINETA: Anaesthesia

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