Colonoscopy is a procedure that visualizes the entire colon. The doctor is looking for polyps or signs of cancer. Polyps are small growths that over time can become cancer. The doctor uses a thin (about the thickness of a finger), flexible, hollow, lighted tube that has a tiny video camera on the end. This tube, called a colonoscope, is gently eased inside the colon and sends pictures to a TV screen. Small amounts of air are puffed into the colon to keep it open and let the doctor see clearly.
Dr. Robert Carman was here to tell us more.