Disminución idiopática del índice biespectral durante la educción anestésica: posibles causas del fenómeno delta paradójico

We report the case of a patient who on emerging from anaesthesia showed very slowed brain activity on the electroencephalogram and reduced algorithmic value, that lasted approximately 5 min coinciding with sound and tactile stimulation. After keeping her under observation for 24 h during the postoperative period she did not present any brain disorder that could justify that event.