Creatinine is a waste product formed during breakdown of creatine. Creatinine is removed from the body by the kidneys which acts as a blood filter released into the urine.
This test measures the amount of creatinine in the blood.
Creatine is part of the cycle that produces energy for muscles to contract. Levels are produced at a constant rate and because it is filtered by kidneys, the blood levels are usually a good indicator of how well the kidneys are functioning.
Creatinine tests are often used together with Urea tests.Creatinine is usually ordered as part of a general health screen, to evaluate people for kidney diseases and to monitor the response to treatment.
Creatinine tests are commonly ordered for the following reasons: