Lower esophageal surgery requires a gastric tube. Lower esophageal surgery is a procedure to treat a lesion in the lower or middle part of the esophagus via a combination of the left or right chest. It is mostly seen in patients whose esophageal cancer can be surgically removed. When performing lower segment surgery for esophageal cancer, preoperative preparation is needed, and gastric tube insertion is one of the preoperative preparations. When performing lower esophageal surgery, the main function of gastric tube insertion is to alleviate intraoperative vomiting. Since the gastric tube is inserted to maintain the access between the stomach cavity and the outside of the body, intraoperative stimulation-induced vomiting can be discharged to the outside of the body through the gastric tube, thus minimizing the influence on the surgery. In addition, the insertion of a gastric tube can also reduce postoperative abdominal distension. Due to anesthesia and surgery to remove part of the esophagus, stomach and other organs, resulting in organ dysfunction, decreased peristalsis, increased intra-abdominal pressure causing abdominal distension, etc., the insertion of a gastric tube connected to a gastrointestinal pressure reducer can significantly reduce the symptoms of abdominal distension. If surgery on the lower part of the esophagus is required, a gastric tube will be inserted and operated by a medical professional, and active cooperation is recommended.