How to Convert BUN to Serum Creatinine Ratio - Definition, Formula and Example

How to Convert BUN to Serum Creatinine Ratio (BUN:Cr) - Tutorial

Definition:

BUN denotes Blood Urea Nitrogen. BUN to creatinine ratio specifies the ratio of two serum laboratory values, the blood urea nitrogen and serum creatinine,this ratio is used to evaluate the cause of acute kidney damage.

Formula :
BUN to Creatinine Ratio = Blood urea nitrogen / Serum creatinine
Example:

Find out the BUN to creatinine ratio if blood urea nitrogen is 4 mg/dL and serum creatinine is 2 mg/dL.

Given,

Blood urea nitrogen= 4 mg/dL Serum creatinine = 2 mg/dL

Solution:

BUN:Cr = Blood urea nitrogen / Serum creatinine = 4/2 = 2 : 1


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