What is the main purpose of a colonoscope?

The primary purpose of a colonoscope is to perform a visual inspection of the colon, which is achieved through a flexible tube equipped with a light and camera. This procedure, known as a colonoscopy, allows healthcare providers to examine the inner lining of the colon and rectum for abnormalities, such as polyps, tumors, or signs of inflammatory bowel disease. By providing real-time imaging, a colonoscope enables effective diagnosis and monitoring of gastrointestinal conditions.

Other options focus on different parts of the digestive system. The stomach is typically examined using an endoscope designed for esophagogastroduodenoscopy, while the small intestine may require specific imaging tools such as enteroscopes. Additionally, while fluid and tissue samples can be taken during a colonoscopy, the primary function of the colonoscope is not to collect blood samples, but to visualize and assess the colon directly. This distinction underscores why the visual examination of the colon is the correct answer regarding the main purpose of a colonoscope.