What preoperative preparations should be made for gastrointestinal surgery?

Patients who need gastrointestinal surgery should make the following preparations before operation: start eating liquid diet 1, 1 ~ 2 days before operation; 2. Clean the enema one night before operation, empty the intestine, reduce the number of bacteria in the intestinal cavity, and prevent postoperative infection. If you have colon or rectal surgery, you should take antibiotics and laxatives orally before operation and clean the intestines before operation. 3. Fasting 12 hours before operation; 4. No drinking water 4 hours before operation.