Painless gastroscopy is a “more humane” method of gastrointestinal examination. It is based on the application of short-acting intravenous anesthetic drugs (e.g., propofol) to conventional gastroscopy, so that the patient is under anesthesia during the insertion of the gastroscope and obtains a painless examination procedure. Usually the patient is able to go from a fully anesthetized state to consciousness at the end of the examination, or a few minutes later. The entire procedure is usually guarded by an anesthesiologist with cardiac and respiratory monitoring. Anesthesia accidents during painless examinations have not been observed. For patients who need longer endoscopic diagnosis, biopsy or endoscopic treatment, painless endoscopy is the best choice. However, the charges are relatively much higher.