Tami is right, it's called TPN and it is given IV via the port. TPN can also be done at home and a referral can be made to a home care program and an IV pharmacy, but all that should be resolved before they attempt to discharge him.
Patients also have the right to appeal hospital discharges they don't agree with through the state peer review organization. It's called somehting different in each state but they should have given you a patient's bill of rights when he was admitted that lists the phone numbers for complaints. Usually you tell the hospital you disagree with the discharge and want to file an appeal if it comes to that.
The basic issue is how can we make sure that this is resolved and he doesn't develop dehydration and malnutrition again.
JoAnne