Data collection and outcomes
nausea or vomiting, bradycardia, visceral pain, fatigue, pain, dizziness, hypoxemia, hypotension, headache, abdominal bloating
ADVERSE EVENTS, SECONDARY
Baseline data were recorded, such as age, sex, height, weight, body mass index, ASA physical status, and type of operation. The MAP, HR, RR, and SpOThe primary outcome was the incidence of visceral pain after the procedure. Because there is no universal scale for quantifying visceral pain, we defined a visual analog scale (VAS) score of ≥ 1 10 min after recovery as visceral pain. The secondary outcomes were visceral pain at 20 and 30 min after recovery, propofol consumption, the incidence of injection pain caused by propofol, episodes of hypotension (defined as an MAP less than 60 mmHg or 30% of the values before the induction of anesthesia) or bradycardia (defined as an HR less than 60 bpm), the operation time, the recovery time, and the adverse events at 24 h after recovery, such as fatigue, nausea or vomiting, abdominal bloating, dizziness or headache, hypoxemia (blood oxygen saturation below 90% for more than a minute or requiring any airway intervention), and involuntary body movement.