657-900-4536 info@gilc-oc.com

In a Colonoscopy treatment, an endoscope is inserted through the anus to observe the large intestine (colon and rectum) and part of the small intestine, and polyps, cancer, and inflammation that occur in these areas are diagnosed. A part of the tissue is taken (biopsy), and polyps and early colorectal cancer are examined endoscopically by polypectomy (polypectomy), endoscopic mucosal resection (EMR), and endoscopic submucosal layer and can also be excised by ablation (ESD).

It is a very important test for both detection and prevention of colorectal cancer and should be done once after the age of 40. After cleaning the large intestine with a laxative, an endoscope with a thickness of 10 to 13 mm is inserted through the anus to directly observe the entire large intestine for polyps, tumors, inflammation, and other abnormalities. The inspection time varies depending on the purpose of the inspection and the number and size of polyps found. It is about 10 to 30 minutes

Incidents associated with colonoscopy

  • Occurrences of colonoscopy include intestinal perforation (holes in the intestine.
  • The complications of colonoscopy treatment are mainly bleeding (melena) and intestinal perforation.


The colonoscopy treatment site becomes an ulcer, and bleeding may occur for about a week. The frequency is about 1% (about 1 in 100). Post-treatment bleeding is not enough to get blood on the stool, but the toilet bowl turns red with blood.

If bleeding continues, you will need to stop bleeding with an endoscope.

Injection of analgesics and sedatives

Our center uses injections of sedatives and analgesics to relieve anxiety and tension during examinations. Disadvantages of sedatives and analgesics include drowsiness and poor judgment on test day. If you are elderly, please be accompanied by your family. The amount of sedatives/analgesics used may be reduced or discontinued at the doctor’s discretion. 

Prohibition of driving after colonoscopy

  • Do not drive a car, motorcycle, bicycle, etc., all day after the inspection. It may lead to an accident due to impaired judgment due to sedatives and painkillers.
  • If you receive colonoscopy treatment, you will not drive a car for 3 days and a motorcycle/bicycle for 7 days from the day of treatment. This is because anemia due to bleeding can lead to an accident. It also has the purpose of keeping you at rest and preventing bleeding.

Bleeding tendency drugs

  • If you are taking medicine that makes it difficult for blood to clot on the day of the test, you may not perform the treatment.
  • If your doctor has instructed you to stop taking medicine, please follow the instructions.

Cause of pain in colonoscopy

Most of the cases of colonoscopy (colonoscope) pain occur in the sigmoid and transverse colons.

The reason is that the sigmoid colon and the transverse colon are not fixed and are bent in a squishy state. The place and shape are constantly changing. If you proceed, unnecessary pressure will be applied to the intestinal tract, and pain will occur.

To avoid pain, it is necessary to advance the scope while straightening the meandering intestine.

  • If you try to pass a wire through a bent sprinkler hose, you will not be able to proceed due to resistance, but if you hold both ends of the hose and straighten it, you can imagine that it will move without resistance. When “resistance” occurs in the large intestine, it causes pain.
  • The second point is that the large intestine swells excessively, causing pain.
  • To advance the colonoscope to the back. We will check the direction of travel while injecting air and perform an inspection. If you do so, excessive pressure will be applied to the intestinal tract and cause pain.
  • If you inflate the balloon too much, you’ll get a bang. if the same thing happens in your stomach, you can imagine it hurt.
  • Pain in which the air stretches the intestinal tract. When air enters (puts) into the large intestine, it swells and becomes like a balloon about to burst, causing pain.
  • Thin people have a small body or have constipation (pain that passes through the bent intestines). Thin people with a small body or constipation have more continuous S-shaped curves because the large intestine is densely folded in the abdomen compared to normal people.
  • Forcibly pushing the endoscope at the bend (sharp curve) will apply unnecessary tension to the intestine, causing pain in that part.

People with sensitive intestinal nerves

It may be found in patients with irritable bowel syndrome or inflammatory bowel disease (ulcerative colitis / Crohn’s disease). Still, intestinal hypersensitivity is higher than in normal patients, and it is easier to feel pain.

Ø  Persons with a history of abdominal surgery (adhesion) such as cesarean section and gastric surgery
  • During surgery to open the abdomen, such as a Caesarean section, adhesions occur, and part of the large intestine adheres to surrounding tissues, causing the intestines to deform.Even if you try to move the endoscope straight, the endoscope will bend at the adhesion part, and a force that does not initially occur at the adhesion part will be applied. There will be a pain.