A colonoscopy is an internal examination of the colon (large intestine) and rectum, using an instrument called a colonoscope.

The colonoscope has a small camera attached to a flexible tube that can reach and examine the entire length of the colon.

How the Test is Performed

You will usually be given medicine into a vein to help you relax and not feel any discomfort. You will be awake during the test and may even be able to speak, but you will likely not remember anything.

You will lie on your left side with your knees drawn up toward your chest. The colonoscope is inserted through the anus. It is gently moved into the beginning of the large bowel and slowly moved as far as the lowest part of the small intestine.

Air will be inserted through the scope to provide a better view. Suction may be used to remove fluid or stool.

Because Dr. B C Shah gets a better view as the colonoscope is pulled back out, a more careful examination is done while the scope is being pulled out. Tissue samples may be taken with tiny biopsy forceps inserted through the scope. Polyps may be removed with snares, and photographs may be taken.

Specialized procedures, such as laser therapy, may also be done.

See more at: http://drbcshah.com/colonoscopy/