RDM Consultants do not advise customers to use the EEG or any processed EEG monitor to give a measure of depth of anaesthesia in the sense that you could use it to control an anaesthetic automatically. There are simply too many other factors which can affect the EEG during surgery. We do recommend the use of such monitoring as an aid to detecting adverse cerebral events or trends during anaesthesia. However there can be no guarantee that absolutely every adverse cerebral event or trend will be detected. In general, in moderate to deep anaesthesia and in sedation in Intensive Care, EEG monitoring is a good indicator provided that you do take other factors into account and do not rely upon it as a sole indicator.