The cleanliness of the intestine is one of the key factors in the success or failure of colonoscopy. If there is still a lot of stool in the intestinal tract at the time of examination, it will affect the entry and observation of the microscope, and even cannot complete the whole colon examination. Therefore, the cleanliness of the intestinal tract before the examination is very important: 1, the day before the examination into a semi-liquid diet with less residue, such as thin rice, do not eat vegetables and watermelon and other fruits with seeds.
2, in about 4 hours before the examination, adults 50 grams, children 25-35 grams of magnesium sulfate powder with warm water 100 ml orally, after 1 hour oral warm water 2000-2500 ml.
3, can take other kinds of laxatives according to medical advice, such as polyethylene glycol electrolyte bulk, sodium phosphate oral solution, etc.
4. Generally, the bowel movement starts after half an hour or so, and the stool in the large intestine can be basically cleared after 5-7 times of diarrhea. Some patients in the process of intestinal preparation will occur vomiting, which may be related to the stimulation of magnesium sulfate and a large amount of water in a short period of time, can be mixed into the magnesium sulfate drink after oral intake, and then slowly oral plain water, to not feel obvious bloating as the standard.
5, if the end of drinking water 4 hours later still no defecation, it is invalid, that should go to the hospital, under the guidance of the doctor to do intestinal preparation, or re-appointment of examination time.