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It is believed at Apollo Hospitals that the first step to cure is accurate diagnosis of the disorder. Read more about the state-of-the-art diagnostic capabilities at the Institutes of Gastroenterology.

Colonoscopy

Colonoscopy is a procedure used to see inside the colon and rectum which are parts of the large intestine for diagnoses and /or treatment.

1. What problems can colonoscopy detect?

Colonoscopy is a procedure used to see inside the colon and rectum.

Colonoscopy can help doctors diagnose the reasons for

  • Unexplained changes in bowel habits
  • Abdominal pain
  • Bleeding from the anus
  • Unexplained weight loss

Colonoscopy can also detect inflamed tissue, ulcers, and abnormal growths.

The procedure is used to look for early signs of colorectal cancer. The doctor can also take samples from abnormal-looking tissues during colonoscopy. The procedure, called a biopsy, allows the doctor to later look at the tissue with a microscope for signs of disease. The doctor removes polyps and takes biopsy tissue using tiny tools passed through the scope. If bleeding occurs, the doctor can usually stop it with an electrical probe or special medications passed through the scope. Tissue removal and the treatments to stop bleeding are usually painless.

2. Colonoscopy can be used to

  • Remove polyps (polypectomy)
  • Dilate narrowed segments (stricture dilation) of large intestine and place metallic stents across them (colonic stenting)
  • Banding for haemorrhoids (piles banding)

3. How is colonoscopy performed?

During colonoscopy, patients lie on their left side on an examination table. The doctor inserts a long, flexible, lighted tube called a colonoscope, into the anus and slowly guides it through the rectum and into the colon. The scope inflates the large intestine with carbon dioxide gas to give the doctor a better view. A small camera mounted on the scope transmits a video image from inside the large intestine to a computer screen, allowing the doctor to carefully examine the intestinal lining. The doctor may ask the patient to move periodically so the scope can be adjusted for better viewing.

Once the scope has reached the opening to the small intestine, it is slowly withdrawn and the lining of the large intestine is carefully examined again. Bleeding and puncture of the large intestine are possible but they are uncommon complications during colonoscopy.

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