This study will compare the effects of transcutaneous acupoint electrical stimulation versus no stimulation on intraoperative gastric reflux in patients undergoing general anesthesia with i-gel airway device ventilation.
age ≥18 years old
scheduled for surgery under general anesthesia with igel ventilation
American society of anesthesiologists status higher than grade 3
history of gastrointestinal surgery
Currently taking acidic medications, or medications that affect gastric acid secretion or gastrointestinal motility
High risk of reflux or aspiration (e.g., symptomatic gastroesophageal reflux disease or hiatal hernia)