![]() ![]() 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. Meanwhile, testing blood urea nitrogen (BUN) allows the clinician to determine urea nitrogen levels in blood.The creatinine levels may be used to assess muscle and kidney health This leads to a spike in the normally constant blood creatinine levels. Damage to muscles resulting from injury or degenerative diseases causes the release of creatinine in blood.Creatinine levels usually decrease with age because of age-dependent decreases in muscle mass This makes it a useful indicator for muscle and kidney disorders. Aside from this, creatinine formation rate is fairly constant during normal conditions. The rate of creatinine formation depends on an individual’s muscle mass.After creatine is used up, the creatinine that is produced travels through blood and exits through the kidneys.It is the end-product of creatine metabolism Creatinine is formed when a high-energy compound called creatine is expended by muscles to fuel their contraction.What is the Bun-to-Creatinine Blood Test? (Background Information) ![]() ![]() What are other Names for this Test? (Equivalent Terms) ![]()
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