Differential electroencephalographic response to tracheal intubation between young and elderly during isoflurane- and sevoflurane-nitrous oxide anaesthesia

A significant difference was detected in EEG response to tracheal intubation between young and elderly. BIS does not reflect the depth of anaesthesia after tracheal intubation during anaesthesia with isoflurane or sevoflurane with 66% of N2O in young patients.