[An anesthetic experience of epileptic focus resection in a nine month-old girl under monitoring by electrocorticography].

We report a successful electrocorticography (ECoG) monitoring for a epileptic cortical focus resection in a 9-month-old girl with uncontrollable epileptic seizures. Anesthesia was induced and maintained with nitrous oxide, oxygen, and sevoflurane with vecuronium. After the craniotomy, ECoG monitoring was used to locate the epileptic cortical lesion. During the procedure of subpial resection and gyrectomy, ECoG was repeatedly recorded. It was necessary to maintain adequate depth of anesthesia throughout the procedure to clarify the epileptic waves. For this purpose, sevoflurane (2.5%) with and oxygen (97.5%) under controlled-hyperventilation (PaCO2 30 mmHg), was useful for monitoring the epileptic seizure wave from cortical focuses properly.