A Clinical Trial Evaluating the Efficacy and Safety of HSK21542 in PONV

HSK21542 injection of 60 μg was administered once within 15 min before the end of surgery, and was administered by intravenous bolus injection for no less than 30 s;

HSK21542 injection of 120 μg was administered once within 15 min before the end of surgery, and was administered by intravenous bolus injection for no less than 30 s;

HSK21542 injection of 180 μg was administered once within 15 min before the end of surgery, and was administered by intravenous bolus injection for no less than 30 s;

A placebo was administered once within 15 min before the end of surgery, and was administered by intravenous bolus injection for no less than 30 s;