During a sigmoidoscopy, the patient lies on their side on an examination table. The doctor gently inserts the sigmoidoscope into the rectum and advances it into the sigmoid colon. Air may be pumped through the tube to inflate the colon slightly, providing a better view of the intestinal walls. The camera transmits images to a monitor, allowing the doctor to examine the lining of the colon for any abnormalities. The procedure typically lasts about 10-20 minutes and may cause some discomfort, but it is usually not painful.
