It processes the EEG and provides an index value between 0-100 that indicates the patient's level of consciousness.

M/C used method to monitor the depth of anesthesia

• 100: Awake (Responds to normal voice)
• 80: Light/moderate sedation (May respond to loud commands or mild prodding/shaking)
• 60: General anesthesia (Low probability of explicit recall, Unresponsive to verbal stimulus)
• 40: Deep hypnotic state
• 20: Burst suppression
• 0: Flatline EEG

Middle latency auditory evoked potential is the most sensitive indicator to evaluate the depth of anesthesia.