Figure 3

Comparison of the blood pressure fluctuations over time. T0: before spinal anesthesia; T1: immediately after spinal anesthesia; T2: 2 min after esketamine or saline administration; T3: beginning of surgery; T4: delivery of the fetus; T5: End of surgery; *:P < 0.05; **:P < 0.01; ***:P < 0.001.