Kidney Function Tests

The InsHeal Content Repository includes numerous articles on laboratory tests. The table below lists laboratory tests that test kidney function (along with a brief description of each group) for which content and articles are available. For further information, please reach out to us at

Blood TestDescription
Blood Urea Nitrogen (BUN)The BUN measures the amount of urea in the blood, which is a byproduct of protein breakdown. It is filtered by the kidneys and excreted in the urine. Its level in the blood increases in kidney disease, though other conditions may also be responsible.
Blood Urea Nitrogen (BUN) – Serum creatinine ratioThe ratio of blood urea nitrogen (BUN) and serum creatinine is a calculated value that helps to determine the possible cause of kidney dysfunction.
Serum creatinineCreatinine is a breakdown product of muscles and is removed from the body by the kidneys. Its level in the blood increases in rhabdomyolysis, a condition where the muscles break down, or kidney disease, beside some other conditions.
Serum sodium levelsThe serum sodium levels are maintained in a range of between 135 to 145 mmol/L. Low or high sodium levels may be associated with changes in fluid volume within the blood vessels.
Serum uric acidUric acid is a waste product that is eliminated by the kidneys through the urine. High levels result in gout, a condition that results in joint swellings, and kidney stones.

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Disclaimer: The content provided on this site is meant for informational purposes only and not intended to replace the relationship between the doctor and the patient. It should not be used for self-treatment by patients or by doctors to treat patients. Consult your doctor before using any of the above  information.