Cap Assisted Upper Endoscopy to Visualize the Major Duodenal Papilla

Inclusion Criteria: * Indication of Esophagogastroduodenoscopy independent from the study * Written informed * Age ≥ 18 years Exclusion Criteria: * Absence of written informed consent * Contraindication or absence of informed consent regarding sedation with Propofol * Postoperativ changes of the upper GI-tract * Intention of endoscopic intervention * Suspicion of upper GI-bleeding * Suspicion of stenosis of the esophagus * Stent in the papilla duodeni major * ASA (American Society of Anesthesiologists) classification ≥ 3