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A kidney function test, also known as a renal function test, is a blood test that measures the levels of certain substances in the blood to assess how well the kidneys are functioning. These tests can help to detect early signs of kidney damage and dysfunction. Some common kidney function tests include the blood urea nitrogen (BUN) test, creatinine test, and glomerular filtration rate (GFR) test. These tests may be ordered as part of a routine physical exam or to monitor kidney function in people with certain medical conditions.<br>{{stub}} [[Category:Definitions]]