Effect of Bispectral Index Monitoring (BIS) on Body Movement of Outpatients Undergoing Gastroscopy

In the BIS group, the anesthesiologist set the target controlled infusion (TCI) parameters according to the patient's height, weight, gender and age. The initial plasma target concentration was set to 1.5ug/ml, and the target concentration would be increased or decreased 0.5ug/ ml every two minutes to maintain the BIS value at 45-60.

In the OAA/S group, the anesthesiologist set the TCI parameters according to the patient's height, weight, gender and age. The initial plasma target concentration was set to 1.5ug/ml, and the target concentration would be increased or decreased 0.5ug/ ml every two minutes maintain the OAA/S value at 1 point.

Gastroscopy would be performed when the BIS value was 45-60 or the OAA/S score was 1

Propofol infusion was administered under the guidance of the BIS or OAA/S before the gastroscopy, and the infusion was stopped at the end of gastroscopy