Hi. I'm online and happy to answer your question today. Is your father still in the ICU?
I do not believe that your fathers doctors would overlook a drug or treatment that would be contributing to his lack of responding at the moment. As far as looking at more then just his kidneys, of course they should be looking at other issues. As you already stated, they have looked at his brain with a CT scan already and I am sure that they are closely monitoring all his other body functions.
It has not been that long since your father underwent major surgery. Give things time. It sounds like he is in excellent hands and everything that can be done is being done for him.
Does this make sense to you?
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I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)