You searched for: “gastroduodenoscopy
An instrument which is either fiberoptic or video that is used in endoscopic examinations of the stomach and duodenum.

A gastroduodenoscope can be end-viewing (looking forward) or side-viewing (looking to one side). The side-viewing instruments are used for the cannulation (medical tube) of the pancreas and bile duct.

Cannulation refers to a flexible tube with a sharp-pointed part at one end which is inserted into a duct, vein, or cavity in order to drain away fluid or to administer drugs.