Evaluation was based on the following criteria: general characteristics, anesthetic concentration (%), anesthetic gas volume (ml), level of sedation according to RASS, pain level according to NIPE, proportion of patients with abnormal movements according to the criteria. Ellis, time to extubate, rate of patients with vomiting, nausea at time points T0: face up to induce anesthesia, T1: After intubation, T2: Time to start treatment, T3 - 7: When the treatment is 20, 40,... 120 minutes, Tx: at the end of the treatment, turn off the anesthetic gas.