Observational of Emergence Time Between Patients Receive General Anesthesia With BIS or Spectrogram EEG Monitor

The bispectral index parameter is used to guide the titration of general anesthesia, however; conflicting results between different studies cannot prove the benefit of EEG monitor on improvement of OR efficiency. Next Generation SedLine features an enhanced signal processing engine, which provides processed EEG parameters. This four channel EEG monitor for the monitoring of perioperative anesthesia depth prevent overdose of medication and may help for individualized anesthetic plan. This research intended to observe the emergence time from end of the surgical wound closure to patient awake (or to extubation) with or without SedLine.