Those suspected of colorectal cancer can undergo fiber colonoscopy

It is very necessary for patients suspected of having colorectal cancer to undergo a fiber colonoscopy. This examination can not only detect the presence of colorectal cancer, but also observe its size, location, range of local infiltration, and whether there is adhesion between the intestinal wall and surrounding tissues. It can also take living tissue for pathological section examination to determine the nature and degree of differentiation of the tumor, which helps doctors to fully diagnose the patient's condition.

Precautions for fiber colonoscopy

1. Before undergoing a fiber colonoscopy, the patient should have their liver function and hepatitis B surface antigen checked, because different mirrors are required for hepatitis B surface antigen-positive and -negative patients.

2. The patient's colon must be clean.

3. The patient should eat a semi-liquid diet with little residue 2 days before the examination, and rice porridge for 3 meals a day. No vegetables or fruits are allowed. The patient should fast on the morning of the examination. At around 10 am on the morning of the examination, the patient should take 250 ml of 20% mannitol orally as ordered by the doctor, and drink 1000 ml of boiled water immediately. At noon on the examination day, the patient can eat a small amount of dry food and go to the endoscopy room in the afternoon to wait for the examination.

4. During the examination, the patient should relax, lie on his side, and flex both lower limbs.

5. Patients should not eat immediately after the examination. They should wait until the gas in the colon is discharged and the abdominal distension disappears before eating easily digestible liquid food.

Applicable population for fiber colonoscopy

1. Patients with unexplained blood in stool and persistent positive occult blood in stool, suspected of having colon tumors.

2. Patients with abdominal masses, especially those in the lower abdomen, who need further diagnosis.

3. Patients suspected of having colon polyps or those found to have intestinal polyps through X-ray examination who need to differentiate between benign and malignant.

4. Those whose cancer extent needs to be determined before surgery.

5. Check whether there is recurrence of colorectal cancer after surgery.

Contraindications for fiber colonoscopy

1. Patients with severe acute colitis.

2. Patients suspected of intestinal perforation, acute peritonitis or extensive intra-abdominal adhesions.

3. Patients suffering from active bacillary dysentery.

4. Patients with acute inflammatory lesions in the rectum, anal canal, and around the anus.

5. Those with severe cardiovascular or cerebrovascular disease or cardiopulmonary insufficiency and intolerance to examination.