Need help to know the rigth questions to ask.

[mommak]

Since Mike is still in the hospital, they are running labs almost every day. Since he is inpatient, they dont give him number results, but I know that there has to be a number that will show that his kidneys are responding to Dialysis.  What information do I want them to give me out of his labs.  He is still having less than 100cc of urine output even on his off dialysis days, however the nurses told me that the dialysis will impact that number too. 
What lab sign will be the ray of sunshine that says that this acute incident is resolving.  after that what will be the information that will show if there is residual damage?
Thanks for any help you can offer

[Restorer]

Dialysis doesn't help kidneys work better - it replaces some of their function. The best sign that his kidneys are getting better is when they start to produce more urine. Then they can test the urine and make sure he's eliminating all the waste he's supposed to. At that point, his 24-hour creatinine clearance will be the number that will best indicate his kidney function.

[Bill Peckham]

What are they saying actually took out Mike's kidneys? Restorer is right that for kidney function the first step is to see a return of output and then to test the pee to see if the kidney's are leaving in what they should leave in and taking out what they should remove.

Right now I'd want to know what his white blood cell count is and would be looking for that to get back below 10,000, suggesting the sepsis is being treated.

[mommak]

I spoke to his nurse today.  Yesterday he had a little less than 100 ml of urine output.  His labs this morning show creatinine of 12.0 and Bun of 28.  I know those are both elevated, but I dont really understand what they mean.  His blood cultures form last week have shown that their was no more bacteria in his blood, although they just ran a new set on Saturday because he was running a low grade fever again. 

I feel sort of out of my element here, there is so much information on the internet, some good and some bad, I know that my situation is different with him having ARF, but you all have lived through these labs for so long.  I am so grateful to be able to come to you all for some help.