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  • Title: Induction of anaesthesia with sevoflurane, preprogrammed propofol infusion or combined sevoflurane/propofol for laryngeal mask insertion: cardiovascular, movement and EEG bispectral index responses.
    Author: Blake DW, Hogg MN, Hackman CH, Pang J, Bjorksten AR.
    Journal: Anaesth Intensive Care; 1998 Aug; 26(4):360-5. PubMed ID: 9743848.
    Abstract:
    Inhalation induction with sevoflurane was compared with propofol or sevoflurane/propofol in 60 unpremedicated adults. Target concentrations for the three groups (with 60% nitrous oxide) were 3% end-tidal sevoflurane, 12 mg/l propofol and 1.5% sevoflurane/6 mg/l propofol respectively, prior to insertion of a laryngeal mask airway (LMA) at 10 minutes. Induction of anaesthesia was satisfactory in each group, but movement response to LMA insertion was observed in 20 patients (least in the sevoflurane group). Cardiovascular responses were similar except for a lower heart rate in the sevoflurane group. EEG bispectral index suggested a greater depth of anaesthesia in the inhalation induction group. A bispectral index of 60 separated patients responding to LMA insertion from nonresponders (P = 0.006), and had a sensitivity of 68% and specificity 70%. Movement response was not predicted by cardiovascular changes.
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