Pre-operative preparation for colonoscopy 1, three days before the examination eat easily digestible diet, such as soft rice, thin rice, noodles, tofu, eggs, milk, soy milk, etc., forbidden to eat food containing coarse fiber. 2, morning examination patients fast in the morning of the examination, afternoon examination patients can drink milk and soy milk in the morning, fasting at noon, painless examination two hours before the water fast. 3, as required oral cleansing agent to cleanse the intestines, generally will be taken within two hours of the discharge, the final exclusion of stool for clear water or yellow water without fecal residue before the examination. Gastroscopy preoperative preparation Fasting after 8:00 p.m. the day before the examination, fasting and water fasting on the morning of the examination, prohibition of drugs (antihypertensive drugs can be taken under the tongue). Note 1: Wait in line at the entrance on the day of examination according to the appointment number. 2, painless examination requires at least one family member to accompany the examination, at least half an hour after the examination before leaving the hospital, no driving or working at height on the examination day. 3.Female patients should avoid menstruation and pregnancy for colonoscopy.