Effect of Esketamine on Anxiety State in Patients Undergoing Abdominal Tumor Surgery

Esketamine 0.2mg/kg was pumped slowly after intubation, followed by 0.1mg/kg pumped until the end of the operation. In the PCIA pump, esketamine 1mg/kg was added to the sufentanil.

Same volume of normal saline was pumped slowly after intubation, followed by the same volume of NS until the end of the operation. In the PCIA pump, only sufentanil was used.