Endoscopy is a nonsurgical procedure performed in order to look into a person’s digestive tract. Using an endoscope, a flexible tube with a light and camera attached to it, we can view pictures of the digestive tract on a TV monitor. During an Upper GI Endoscopy, an endoscope is easily passed through the mouth and throat and into the esophagus, allowing the doctor to view the esophagus, stomach, and upper part of the small intestine.