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Colonoscopy is a diagnostic examination of the entire length of the large intestine, from the rectum all the way up through the colon to the ileum. This presage can be used to look for polyps in the colon or to diagnose colon cancer. The procedure is performed with a special type of endoscope named a colonoscope. Patients usually get a sedative before this procedure for relaxation. The procedures usually takes between 30-60 minutes to complete. Colonoscopy enables a doctor to see inflamed tissue, ulcers, abnormal growths and bleeding. For the procedure, a person lies down on the left side on the examining table and after given a sedative to make you feel comfortable, the doctor inserts a long flexible tube into your rectum and guides it slowly through the colon. The scope transmits the image inside the colon while blowing air into the colon (which inflates to help see better). If an abnormal polyp is found, it can be removed using small instruments that are passed through the scope. The biopsy is sent to a lab for test results. Before performing a colonoscopy, your colon must be completely empty. You may be told to drink lots of liquids along with taking a laxative the night before the procedure. You will not be allowed to drive back home on your own so prepare ahead of time for somebody to pick you up.
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