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Kidney Diseases

Blood Tests

10/01/2009

Question:

Recently I had a CBC done (last week), and the doctor just mailed the results to me in the mail. I was alarmed when I saw that my BUN/CREAT level was 30.0. In addition, for the last three months my ankles and legs have been swollen and I was diagnosed with cellulitis; then I developed C Diff from vancomycin.

Could I have renal failure?

Answer:

Cannot tell from a ratio if you have renal failure. For example you could have a normal creatinine of 0.6mg/dl and a BUN of 18 which is a ratio of 30. You could have an elevated creatinine of 3mg/dl with a BUN of 90 and still have a ratio of 30. You need to know the value of the creatinine.

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Response by:

Thomas   Zipp, MD Thomas Zipp, MD
Assistant Professor of Medicine
School of Medicine
Case Western Reserve University