Upper GI endoscopy is a diagnostic procedure that visualises the upper part of the gastrointestinal tract (the oesophagus, the stomach and the duodenum. This video, created by Nucleus Medical Media, shows an upper GI ( gastrointestinal) endoscopy procedure to diagnose helicobacter pylori,. UGIE · The gold standard for the diagnosis of varices is Upper Gastrointestinal Endoscopy (UGIE)2. Characteristics of patients undergoing UGI endoscopy (UGIE) at the district. UGIE is a frequent diagnostic and therapeutic procedure in patients admitted to the ICU, particularly at the surgical and medical ICU.