Indications for electronic colonoscopy:
1. Unexplained lower gastrointestinal bleeding.
2. Chronic diarrhea of unknown cause.
3. Abdominal masses of unknown cause cannot be excluded from lesions of the large intestine and terminal ileum.
4. Unexplained middle and lower abdominal pain.
5. Suspected benign or malignant colon tumors who cannot be diagnosed by X-ray examination.
6. Suspected chronic intestinal inflammatory disease.
7. Barium enema is found to be abnormal, and the nature and scope of the lesion need to be further clarified.
8. Determine the scope of the lesion before colon cancer surgery, and follow-up after colon cancer and polyps surgery.
9. Unexplained low intestinal obstruction.
10. Unexplained anemia and weight loss.
11. Certain gastrointestinal tumors of unknown cause are abnormally elevated in serum markers, such as CEA, CA199, etc.
12. Those who have a clear family history of colorectal cancer, that is, their immediate family members have suffered from the disease.
13. Those who have recently experienced unexplainable changes in stool habit or stool characteristics.
14. Before surgical treatment of hemorrhoids.
Contraindications of electronic colonoscopy:
1. Endoscopy is not suitable when the anorectal stenosis and the endoscope cannot be inserted.
2. Patients with symptoms of peritoneal irritation, such as intestinal perforation, peritonitis, etc., are contraindicated to do this examination.
3. Acute anorectal infection or painful lesions, such as anal fissure, perianal abscess, etc., avoid colonoscopy.
4. Women's menstrual period should not be checked, and should be done carefully during pregnancy.
5. Those who are elderly, physically weak, severely hypertensive, anemia, coronary heart disease, cardiopulmonary insufficiency, should not undergo endoscopy.
6. Early after abdominal and pelvic surgery, if there is suspected perforation, intestinal fistula or extensive abdominal adhesion, this examination is contraindicated.