Kidney Function Level 27. A typical bun level falls between 7 and 20 milligrams per deciliter. It gives your doctor an idea of how much.
Kidney function tests usually require a 24 hour urine sample and a blood test. Glomerular filtration rate gfr is the best measure of kidney function. Higher values could be a sign of an underlying condition affecting the kidneys.
A 24 hour urine sample is a creatinine clearance test.
They are usually checked with another kidney function marker called bun or blood urea nitrogen. Glomerular filtration rate gfr is the best measure of kidney function. Glomerular filtration rate gfr. It may be estimated from your blood level of creatinine.