Colonoscopy pull unclean enema, is the prepared enema liquid through the anus into the intestinal lumen, in order to facilitate the discharge of intestinal contents out of the body, so as to achieve the effect of colonoscopy before the examination of the intestinal tract clean. Enema, that is, colonic irrigation, enema operation, the doctor will use specialized equipment, in accordance with the requirements of the patient in a good position (such as the right side lying position, etc.), after the patient will be saline, soap, liquid medicine, etc., from the anus into the intestinal tract, to promote intestinal contents from the body, so as not to interfere with the field of view of the colonoscopy, so as to achieve the effect of cleaning the contents of the intestinal lumen (eg, feces, etc.). Fasting is required before performing colonic irrigation, usually after dinner on the day before the examination and until the end of the colonoscopy. Patients should be careful to relax as much as possible during the enema, avoiding excessive emotional tension. Nervousness and anxiety should be eliminated, and this medical operation should be treated correctly. Patients who take enema before colonoscopy should follow the doctor’s instructions and cooperate actively under the doctor’s guidance to complete this operation.