The Hepatopancreatic ampulla and accessory pancreatic duct are emptied in the duodenum, if it's bypassed, then all the pancreatic juices are bypassed as well. Meaning that patient will struggle to break down most if not, all food stuffs from the macromolecules to their smaller simpler monomers.
So add: galactose,glucose or fructose, amino acids, monoglycerides, and pentose sugars to the feeding tube.
And always add water. Water is necessary for all functions to work properly