Sorry to hear what your dad is going through right now, but you did exactly the right thing in getting him to A&E as quickly as you did. Like Marion and Lainy, I have never heard of this in relation to CC either apart from the sweats which can be quite common. Your dad is in good hands at Mayo and I hope that they get to the cause of this.
As to his urine and the stent, when did he have the stent inserted? It can take a bit of time for the stent to start working fully and for things to get back to normal. Please let us know how everything goes.
My best wishes to you and your dad,
Any advice or comments I give are based on personal experiences and knowledge and are my opinions only, they are not to be substituted for professional medical advice. Please seek professional advice from a qualified doctor or medical professional.