Fig. 2

Comparison of the MAP and HR change at diferent time points in the two groups of patients. MAP, mean arterial pressure; HR, heart rate. T0, induction; T1, complete induction of anesthesia; T2, after the duodenum enters the mouth; T3, at successful cannulation; T4, at the end of the operation; T5, post-anesthesia; T6, leave the operating room. Notes Compared with Group P. *P<0.05, **P<0.01,***P<0.001