Therapeutic volatile anesthesia

Dear colleagues,

Please help me to code anesthesia for the case below (general anesthesia was administered for the period of 7 hours):

9yoM previously healthy, in status epilepticus for one month, after 4 day prodromic illness of fever, diarrhea and headache. Scheduled for trial of therapeutic volatile anesthesia to produce burst suppression and break status epilepticus after failure of all other medical interventions.

Thank you.

Therapeutic volatile anesthesia