During a colonoscopy the procedure typically lasts between 20 to 30 minutes. Patients are usually sedated to ensure comfort. The doctor uses a thin flexible tube with a camera to examine the colon for any abnormalities or signs of diseases. It is a crucial screening tool to detect and prevent colon cancer. "To Consult Dr. Manoj Kolhe, Gastroenterology, Hepatology, and Therapeutic Endoscopy, Pune, Maharashtra