Creatinine clearance test. This test evaluates how efficiently the kidneys clear a substance called creatinine from the blood.

Creatinine test. This test measures blood levels of creatinine, a by-product of muscle energy metabolism that, similar to urea, is filtered from the blood by the kidneys and excreted into the urine.

creatinine, urea, electrolytes

it is a blood test to measure kidney function

The creatinine test requires a blood sample. It is recommended that the patient be fasting (nothing to eat or drink) for at least eight hours before the test.

S.Creatinine level