1. During the same examination, adverse phenomena under gastroscope occasionally occur. For example, during anesthesia, due to the relatively long duration of anesthesia, gastroesophageal reflux occurs, leading to cough and aspiration;
2. Under the anesthesia of colonoscopy, patients can't actively cooperate because they can't change their body position again, so it is difficult to enter colonoscopy. Moreover, the relative relaxation of intestinal smooth muscle after anesthesia will prolong the examination time of colonoscopy.
3. When the enteroscope is repeatedly pulled, the patient does not feel anything under anesthesia. After waking up, it will show abdominal pain, which is more obvious;
4. During colonoscopy, it may not be easy to find perforation after anesthesia, but don't worry about it. When pneumoperitoneum is formed by perforation, it can be actively prevented by other X-ray examination and even by observing the exhaust volume of endoscope. Up to now, combined gastrointestinal anesthesia has been carried out, and 1000 patients have not had any active perforation, so you can safely choose painless gastrointestinal endoscopy combined anesthesia.