human
My doctor says I need a colonoscopy. What does that involve?
assistant
A colonoscopy involves inserting a thin, flexible tube into the rectum and slowly advancing it up through the colon until the entire length of the colon is reached. The tube contains a camera which transmits images to a monitor so that the doctor can see any abnormalities or polyps in the lining of the colon. The procedure usually takes about 30 minutes, and you will be awake during the whole process.