Capsule endoscopy is a way to record images of the digestive tract. The capsule is the size and shape of a pill and contains a tiny camera. After a patient swallows the capsule, it takes pictures of the inside of the gastrointestinal tract. The camera has its own light source and as it passes through your intestines the pictures are sent to a small recording device you wear on your body. The pictures are then examined by your doctor to record useful information about your small intestine.
The primary use of capsule endoscopy is to examine areas of the small intestine that cannot be seen by other types of endoscopy such as colonoscopy or esophagogastroduodenoscopy (EGD). This type of examination is often done to find sources of bleeding or abdominal pain.