Kidney Function Level 28. A person can live with just 1 healthy kidney. A 24 hour urine sample is a creatinine clearance test.
More on your kidney function numbers. Tests can be performed to check creatinine and blood urea nitrogen levels which are strong indicators of kidney function. Petite people without much muscle mass will likely have a low kidney number.
Urea is also a metabolic byproduct which can build up if kidney function is impaired.
Kidney function tests usually require a 24 hour urine sample and a blood test. Kidney function tests are a vital part of. Kidney function tests usually require a 24 hour urine sample and a blood test. Normal gfr is approximately 100 but you will often see it reported as 90 greater than 90 or 60 greater than 60.