Great to hear from you and I am real sorry to hear the latest news about Donnie, not what anyone wants to hear. I'm not too sure about the drains etc so will leave comments about them to others. My thoughts right now would be to go see the gp and see if they can get Donnie referred back to Edinburgh and see if they can take a look at what is going on with everything. Especially so as you say that Donnie feels that they have rubbed their hands of him.
What does the Marie Curie nurse say about everything, the drains etc? As to the scan being too risky to do due to renal failure etc, again I can't answer that question for you as I do not know the answer to it either. Apologies for that. My thoughts would be as I said to get to the GP and see what they say about things, what to try and do next etc.
Please tell Donnie that we are all rooting for him and I am sending him my best wishes.
My best to you both,