Inclusion Criteria:  ASA grade I-II Age 18-60 Patients undergoing selective general anesthesia for the correction of septum, endoscopic sinus surgery, bone fracture reconstruction, resection of sinus tumor, augmentation of nose and other nasal surgery Subjects voluntarily participate in the study and sign informed consent  Exclusion Criteria:  History of mental and neurological diseases; History of chronic pain or long-term use of opioids and other analgesics; History of respiratory diseases, severe pulmonary dysfunction and airway hyperresponsiveness; History of severe hypertension and cardiovascular disease; Pregnant women; Patients with severe primary diseases such as liver, kidney and hematopoietic system; patients with abnormal liver function (ALT, AST and TBIL exceeding 1.5 times the upper limit of normal value) or renal dysfunction (creatinine and urea nitrogen exceeding 1.5 times the upper limit of normal value) History of alcohol or drug abuse; History of epilepsy or a recent epilepsy; Obese patients, BMI ≥ 30kg / m2, or with sleep apnea; In addition to the above, the researchers judged that they were not suitable to participate in this clinical trial.