1, at least 4 hours before anesthesia, no water, no food for 8 hours; 2, colds, upper whistling tract infection can not be painless endoscopy, need to be cured before the examination; 3, in order to be safe, the day of the examination, please bring the electrocardiogram and other relevant examination reports, before anesthesia and anesthesiologists face-to-face exchanges, so that it is as much as possible to understand the patient’s medical history, and then based on the state of the body has the right to decide whether or not to carry out the anesthesia; 4, has a history of allergy to anesthetic drugs Please inform the anesthesiologist in advance of the history of allergy to anesthesia drugs and do not hide the condition (such as drinking water, vomiting, vomiting of blood and other medical history); 5, please do not wear metal jewelry, watches, and women should not wear lipstick, nail polish, etc.; 6, the precautions to be taken after the checkup: conscious and awake, with stable signs and able to walk independently without any obvious discomfort, before you can leave; 7, you can drink water in moderation for 2 hours after leaving the room, with the principle of not experiencing gastrointestinal discomfort, and not more than 50 ml each time. Principle, no more than 50 ml each time, if there is no nausea, vomiting and other discomforts half an hour after drinking water, you can gradually increase the amount from a small amount of light liquid diet, but endoscopic treatment and biopsy, you need to eat according to the guidance of the surgical process; 8, family members need to be accompanied by family members after the completion of the examination, and it is forbidden to drive or ride a car (including bicycles and electric vehicles), please do not carry out fine work or sign important documents within 24 hours after the end of anesthesia, and do not drink any water within 24 hours. Important documents, do not drink alcohol within 24 hours, breastfeeding women please stop breastfeeding within 24 hours.