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  • Title: Brain monitoring in dogs using the cerebral state index during the induction of anaesthesia via target-controlled infusion of propofol.
    Author: Ribeiro LM, Ferreira DA, Bressan NM, Nunes CS, Amorim P, Antunes LM.
    Journal: Res Vet Sci; 2008 Oct; 85(2):227-32. PubMed ID: 18061223.
    Abstract:
    The aim of this study was to evaluate the correlation between the cerebral state index (CSI) and the estimated propofol plasma concentrations in dogs during induction of anaesthesia. Fifteen healthy dogs undergoing scheduled routine surgical procedures were enrolled in this study. Target controlled infusion (TCI) software, based on the pharmacokinetic model for propofol, was used to control the syringe pump and to estimate plasma propofol concentrations (PropCp) and the CSI values every five-seconds. Three electrodes placed in the centre of the forehead, on the left side of the forehead and on the left mastoid were used to collect the electroencephalographic (EEG) signal converted by the cerebral state monitor into the CSI. The cerebral electrical changes induced by increasing propofol concentrations appear to be detected by CSI monitoring in dogs. The negative correlation between CSI and PropCp demonstrates that the CSI could be used to assess electrical brain activity in dogs during the induction of anaesthesia with propofol.
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