Figure legends
Figure 1. Consolidated Standards of Reporting Trials (CONSORT) flowchart of patient enrollment, allocation, follow-up, and analysis. CON, control; KET, esketamine.
Figure 2. Postoperative pain scores at rest (A) and at coughing (B) during the first 24 h postoperatively. *P<0.05 indicates statistically significant differences between groups. NRS, numeric rating scale; CON, control; KET, esketamine.
Figure 3. Perioperative MAP and HR values. *P<0.05 indicates statistically significant differences between groups. CON, control; KET, esketamine; MAP, mean arterial pressure; HR, heart rate.