A physiological model of induction of anaesthesia with propofol in sheep. 1. Structure and estimation of variables.

Abstract:

:We describe a six-compartment physiological model of the kinetics and dynamics of induction of anaesthesia with propofol in sheep. It includes a faithful description of initial bolus kinetics caused by accurate representations of the inter-relationships between initial vascular mixing, lung kinetics and cardiac output, the use of the brain as the target organ for propofol anaesthesia (two-compartment sub-model with slight membrane limitation), a description of the effects of propofol-induced changes in cerebral blood flow and a combined description of systemic kinetics as two tissue pools. Variables for the model were estimated from an extensive in vivo data set using hybrid modelling. Propofol was characterized by rapid transit through the lungs, but a slower transit time though the brain, leading to significant delay between arterial blood concentrations and cerebral effects.

journal_name

Br J Anaesth

authors

Upton RN,Ludbrook GL

doi

10.1093/bja/79.4.497

subject

Has Abstract

pub_date

1997-10-01 00:00:00

pages

497-504

issue

4

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)39826-4

journal_volume

79

pub_type

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