Capsule endoscopy is a procedure that allows for video images to be taken off the digestive tract. The patient swallows a capsule that contains cameras, a light, a battery, and a transmitter. Images are sent to a recorder that the patient wears during the day while the capsule passes through the digestive tract. Eventually, the capsule will be passed out of the body in the stool. The most common reason to perform a capsule endoscopy is to evaluate the small intestine for sources of bleeding.