The urine creatinine test measures the amount of creatinine in urine.
Creatinine is a breakdown product of creatine, which is an important part of muscle. Creatinine is removed from the body entirely by the kidneys. Creatinine can also be measured by a
Urine creatinine test
How the Test is Performed
After you provide a urine sample, it is tested in the lab. If needed, your doctor may ask you to
How to Prepare for the Test
Your health care provider may tell you to temporarily stop taking certain medicines that may affect test results. Be sure to tell your provider about all the medicines you take. These include:
- Antibiotics, such as cefoxitin or trimethoprim
Do not stop taking any medicine before talking to your doctor.
How the Test will Feel
The test involves only normal urination. There is no discomfort.
Why the Test is Performed
This test can be used for the following:
- Evaluate how well the kidneys are working
- As part of the
- To provide information on other chemicals in the urine, such as albumin or protein
Urine creatinine (24-hour sample) values can range from 500 to 2000 mg/day. Results depend on your age and amount of lean body mass.
Another way of expressing the normal range for these test results are:
- 14 to 26 mg per kg of body mass per day for men
- 11 to 20 mg per kg of body mass per day for women
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your doctor about the meaning of your specific test results.
What Abnormal Results Mean
Abnormal results of urine creatinine may be due to any of the following:
- High meat diet
- Kidney problems, such as
damage to the tubule cells Kidney failure
- Too little blood flow to the kidneys,
damage to filtering units
- Kidney infection (pyelonephritis)
Muscle breakdown (
rhabdomyolysis), or loss of muscle tissue ( myasthenia gravis)
- Urinary tract obstruction
There are no risks with this test.