![]() ![]() Differentiating prerenal and postrenal azotemia from renal azotemia.What are the Clinical Indications for performing the Bun-to-Creatinine Blood Test?įollowing are the clinical indications for performing the Bun-to-Creatinine Blood Test: Comparing BUN and creatinine levels allows the clinician to determine if the cause of high blood nitrogen (azotemia) stems from malfunction of the kidneys or from some other disorder Testing BUN levels therefore gives information about protein breakdown in the liver and urea excretion in the kidneys.Urea is transported to the kidneys via the blood and excreted out of the body through the urine Urea nitrogen is formed when the liver breaks down protein into ammonia and then urea. ![]()
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