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Guide. An upper gastrointestinal (UGI) endoscopy is a procedure that allows your doctor to look at the inside lining of your esophagus, your stomach, and the first part of your small intestine (duodenum).
Endoscopy Technician Job Description. An endoscopy technician is a medical assistant who helps endoscopy nurses and physicians in the gastroenterology (GI) specialty. They deal with patients who have stomach or intestine problems, or those who are undergoing treatment for serious illnesses like colorectal cancer.