RT Book, Section A1 Ellison, E. Christopher A1 Zollinger, Jr., Robert M. A1 Pawlik, Timothy M. A1 Vaccaro, Patrick S. A1 Bitans, Marita A1 Baker, Anthony S. SR Print(0) ID 1187822204 T1 Common Bile Duct Exploration, Transduodenal Technique T2 Zollinger’s Atlas of Surgical Operations, 11e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781260440850 LK accesssurgery.mhmedical.com/content.aspx?aid=1187822204 RD 2024/04/20 AB Sometimes it is impossible to dislodge a stone impacted in the ampulla of Vater by careful and repeated manipulation, and a more radical procedure is necessary. In such circumstances, the duodenum is mobilized by the Kocher maneuver, and the common duct is exposed throughout its course down to the duodenal wall. An incision is made in the lateral part of the peritoneal attachment of the duodenum, making it possible to mobilize the second portion of the duodenum (FIGURE 1). After the peritoneal attachment has been incised, blunt gauze dissection is used to sweep the duodenum medially. Occasionally, this will expose the retroduodenal portion of the common duct and will allow more direct palpation (FIGURE 2). A blunt metal probe is introduced downward to the point of the obstruction, and the location of the stone is more accurately determined by palpation. A scoop is passed down to the region of the ampulla of the common bile duct, and its course is directed carefully with the index finger and thumb of the surgeon’s left hand (FIGURE 3). With the tissues being held firmly by the thumb and index finger, it is usually possible to break up the impacted calculus with the scoop. Should this prove unsuccessful, it is necessary to open the anterior duodenal wall and expose the ampulla of the papilla (FIGURE 4).