Special care needs to be taken when inserting a gastric tube into a comatose patient so that the tube is not accidentally inserted into the airway. Comatose patients have a weakened gag reflex and no choking response, while normal patients who have a gastric tube accidentally inserted into the airway will experience significant choking and coughing when their airway is stimulated. Comatose patients do not respond, and if inserted into the airway, the injection of food and water may cause aspiration pneumonia, which can lead to death by asphyxiation in severe cases. When inserting the gastric tube, the patient’s head should be gently lifted and the neck passively flexed, which can help the gastric tube enter the esophagus smoothly. To verify whether the patient’s gastric tube is in the stomach, inject about 50 ml of air from the other end of the tube and push it in quickly with a syringe; if a gurgling sound is heard, it is in the stomach. You can also put the other end of the gastric tube into a glass full of water, and if no air bubbles overflow, it means it is in the stomach, and if air bubbles overflow, it means it is in the lungs.