What is a colonoscopy used to check?

The use of a colonoscopy is primarily to examine the inside of the bowels, specifically the large intestine (colon) and rectum. This procedure involves inserting a flexible tube with a camera at the tip, known as a colonoscope, through the anus to visually inspect for abnormalities such as polyps, tumors, or signs of inflammatory bowel disease. It can also be crucial for screening for colorectal cancer and diagnosing gastrointestinal issues.

The focus on checking the inside of the bowels sets colonoscopy apart from the other options, which pertain to different areas of the body and different concerns. For example, heart health is evaluated through other tests like electrocardiograms or echocardiograms; liver function is assessed via liver function tests, which measure enzymes and proteins in the blood; and kidney stones are typically diagnosed using imaging techniques such as ultrasound or CT scans. Thus, the correct understanding of a colonoscopy involves its specific role in gastrointestinal health.