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Kidney Diseases

High BUN/Creatinine Ratio

02/08/2010

Question:

Is 22.7 ratio of BUN/creatinine ratio something to be concerned about?

Answer:

Ratio results are misleading for renal function tests. Example; lets say that the BUN is 10 and the creatinine is 1.0. The ratio is 10. In this example the BUN and the creatinine are normal. Next example; BUN=100 and creatinine is 10. The ratio is also 10, but this is a patient ready to start hemodialysis. Provide the individual creatinine and BUN results for the best interpretation.

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Response by:

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