There is accumulating evidence that inappropriate depth of anaesthesia is associated with increased risk of postoperative complications including risk of death. The aim of this study was to identify factors determining the effective end-tidal concentration (EEtC) of desflurane, duration of wash in and wash out phase, and to estimate the risk of perioperative awareness in patients undergoing elective neurosurgical procedure.
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end tidal concentration of desflurane according to age
Timeframe: from the start of procedure up to 4 hours