Am certain that the procedure that this client is having performed is the Radical pancreatoduodenectomy.
This procedure entails the removal of the head of the pancreas, resecting the duodenum and stomach, and redirecting the flow of secretions from the stomach, gallbladder, and pancreas into the jejunum.
The procedure is a rerouting of the pancreatic and billiary drainage systems, which may be performed to relieve obstructive jaundice.