There is no abnormal tympanic sound on percussion, and the intestinal sounds return to normal.2. Looking at the results of the auxiliary examination, no gas and liquid in the intestinal canal was found through the abdominal standing position, and the flat abdominal CT examination found no gas, liquid and dilated intestinal canal in the lumen of the digestive tract.3. It was verified through the experiment that after clamping the gastric tube and drinking water gradually, the patient had no nausea, vomiting, abdominal pain and abdominal distension. Through the above clinical symptoms and auxiliary examination, we can determine whether the intestinal obstruction has been unblocked and relieved.