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Forum Name: Miscellaneous Nephrology Topics

Question: Creatin level confustion


 Spandky - Fri Mar 19, 2004 12:27 pm

Hi. My friend was very ill last week.. vomitting, loose stools... this went on for nearly 5 days straight. The doctor took blood and urine samples. He has also done that 24 hour urinate in a jar test. His previous results were Creatin 2.1 / BUN 64... and yesterdays results Creatin 2.0 / BUN 62... What does all of this mean? Does he have ARF or CRF? What's going on? The doctor has discussed very little with him... only to let him know that they are going to do another 24 hour test and some more blood tests... I need information... Please HELP.
Thanks,
Spandky
 Dr. Yasser Mokhtar - Fri Mar 19, 2004 7:22 pm

User avatar Dear Spandky,

Thank you very much for using our wesbite.

It is a very complex question to answer.

You have not mentined whether your friend has any chronic diseases, whether he is taking any medications.

If your friend had previous creatinine levels, then it would have been easy to find out whether this is acute or chronic renal failure. If the results were previously normal, then this is acute renal failure. If they were previously abnormal, then this is chronic. This is the most accurate way.

Other ways of finding out
1. Doing an ultrasound of the kidneys, of the kidneys are smaller than normal then this is chronic for sure, if they are not, it means it could be both.
2. Doing a urine analysis which in cases of chronic renal failure can have specific type of casts called broad waxy casts. Also, although non-specific the specific gravity of

These levels of bun and creatinine with your friend history indicate that your friend is most probably dehydrated. If your friend was vomiting for 5 days straight without being able to keep anything down and these were his bun and creatinine levels and in between the 2 tests, he had not had any oral or iv fluids, then this could be acute renal failure that has not resolved because he is still dehydrated.

But needless to say, it is not that easy as chronic renal failure at high bun levels like your friend has can induce vomiting as well.

The 24 hours urine test that your friend's doctor has done is most probably to check kidney function and this test is called creatinine clearance to see how well the kidneys are functioning, but usually this test is done in cases of chronic renal failure as it is believed by many kidney specialists to be of very little value in cases of acute renal failure.

i think it is going to be a wait and see policy, meaning that your friend has to have good hydration and then repeat his bun and creatinine to see if they are improving.

Once more, thank you very much for using our website http://doctorslounge.com and i hope that this information helped.

Yasser Mokhtar, M.D.

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