Effect of Subanesthetic Dose of Esketamine on Sleep Quality

After the induction of general anesthesia, patients in the esketamine group will receive a continuous infusion of esketamine (0.3 mg/kg/h) until the end of the operation.

After the patient's general anesthesia induction is completed, normal saline will be continuously infused until the end of the operation, and the infusion volume is the same as that of the esketamine group.