This may serve as a warning sign that the anesthetic depth is inadequate.

Since general anesthesia first became widely used in late 1846, assessment of anesthetic depth was a problem.

EEG measures taken during anesthesia exhibit stereotypic changes as anesthetic depth increases.

Various signal analysis approaches have been used to quantify these pattern changes and can provide an indication of loss of recall, loss of consciousness and anesthetic depth.

Administer induction drugs, maintain and adjust appropriate anesthetic depth, manage additional treatment and deliver continuous anesthesia care and monitoring into and during the postoperative recovery phase.

The Sociedad de Anestesiología Reanimación y Terapéutica del Dolor de Madrid recommends monitoring of anesthetic depth in accordance with literature-based evidence.

As anesthetic depth increases from light surgical levels to deep anesthesia, the EEG exhibits disrupted rhythmic waveforms, high amplitude burst suppression activity, and finally, very low amplitude isoelectric or 'flat line' activity.