Dreiling tube

Fluoroscopic image showing proper placement of the double-lumen gastroduodenal (Dreiling) collection tube for performance of direct pancreatic function testing. The proximal lumen is situated in the gastric antrum to collect and discard gastric secretion. The distal lumen is deep within the duodenum with the tip of the tube at the ligament of Treitz for continuous collection of duodenal fluid.