Creatinine is a chemical waste product produced by muscle metabolism. When your kidneys are functioning normally, they filter creatinine and other waste products out of your blood. These waste products are removed from your body through urination.
A creatinine urine test measures the amount of creatinine in your urine. The test can help your doctor evaluate how well your kidneys are functioning. This is useful for diagnosing or ruling out kidney disease and other conditions affecting the kidneys.
Your doctor may use a random urine sample to test for creatinine. However, they’ll order a urine 24-hour volume test in most cases. Although one sample of urine can be tested for creatinine, it’s more accurate to collect the urine for a whole day to get that value. The creatinine in your urine can vary a lot based on diet, exercise, and hydration levels, so a spot check is not as helpful. As the name suggests, this creatinine urine test measures the amount of urine produced in a day. It isn’t a painful test, and there aren’t any risks associated with it.
Creatinine values that fall outside the normal range may be an indication of:
- kidney disease
- kidney infection
- kidney failure
- urinary tract obstruction, such as kidney stones
- late-stage muscular dystrophy
- myasthenia gravis
Abnormal values can also occur in people who have diabetes or a diet that’s high in meat or other proteins.
It’s very difficult to evaluate the test results on your own. You should discuss your results with your doctor.
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Creatinine values that fall outside the normal range may be an indication of:
- kidney disease
- kidney infection
- kidney failure
- urinary tract obstruction, such as kidney stones
- late-stage muscular dystrophy
- myasthenia gravis
Abnormal values can also occur in people who have diabetes or a diet that’s high in meat or other proteins.
It’s very difficult to evaluate the test results on your own. You should discuss your results with your doctor.
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