Risks of Gastroesophageal Reflux in the Endotracheal Intubation or the I-gel

In the use of the second supraglottic airway device- i-gel in the laparoscopic pneumoperitoneum and Trendelenburg (LPT) surgical positioning, our data reported that the leak fraction in the i-gel group was higher than in the endotracheal tube group.1 These air leak may be gone into the GI tract and cause the gastric distension resulting in the increasing risk of aspiration. Few studies investigated whether the risk of occurrence of the gastroesophageal reflux (GER), the changes of the lower esophageal sphincter (LES) while the GER occurred, and the stomach fullness in the i-gel group than in the endotracheal tube group. We aim to observe the changes of gastroesophageal function parameters by esophageal manometry, pH impedance, and intra-abdominal pressure before and after laparoscopic pneumoperitoneum during anesthesia, all via the second SADs.