Eric this is so sad to hear. You should know that there are so many person/ people that have these types of surgeries and the specific IBD disease with the underlying auto immune disorder that suffer. There are several medical studies on methods, post op complication , quality of life ,morbidity , and completed suicide rates. It is very sad that so many patients ; persons have suffered on their own . Isolated by medical protocols` narrative that frowns on disclosing information that can help people in dire health ordeal find some solace that they are one of many. You sharing and being a witness to others especially to those whom are needed it the most has meaning that is realized .
I do not understand or, it is logical that you would be able to absorb reasonable amount fluids with only 5-10% of your GI track in your body. I am not very smart and, I am kinda slow, I have a hard time keeping up with a sun dial. I am sure that your fellow followers here wish we could help beyond what we are capable of. Do you think or reason that you could with advise from the doctors that you could soak in a warm tube to hydrate your epidermis. I guess it is the largest organ in the human body. I would think that there`s no comparison to the IV drip although It may be a reverse feed back loop from the body though getting the skin soaked or just a nice warm soaking.
You are already blessed my friend .