Creatinine urine test
Urine creatinine testThe creatinine urine test measures the amount of creatinine in urine. This test is done to see how well your kidneys are working.
Creatinine in the blood can be measured by a blood test.
How the Test is Performed
After you provide a urine sample, it is tested in the lab. If needed, your health care provider may ask you to collect your urine at home over 24 hours. Your provider will tell you how to do this. Follow instructions exactly so that the results are accurate.
Collect your urine at home over 24 hour
The urine 24-hour volume test measures the amount of urine produced in a day. The amounts of creatinine, protein, and other chemicals released into ...
How to Prepare for the Test
Your 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
- Cimetidine, famotidine, and ranitidine
Do not stop taking any medicine before talking to your provider.
How the Test will Feel
The test involves only normal urination. There is no discomfort.
Why the Test is Performed
Creatinine is a chemical waste product of creatine. Creatine is a chemical the body makes to supply energy, mainly to muscles.
This test is done to see how well your kidneys work. Creatinine is removed by the body entirely by the kidneys. If kidney function is not normal, the creatinine level in your urine decreases.
This test can be used for the following:
- To evaluate how well the kidneys are working
- As part of the creatinine clearance test
Creatinine clearance
The creatinine clearance test helps provide information about how well the kidneys are working. The test compares the creatinine level in urine with...
Read Article Now Book Mark Article - To provide information on other chemicals in the urine, such as albumin or protein
Normal Results
Urine creatinine (24-hour urine collection) values can range from 500 to 2000 mg/day (4,420 to 17,680 mmol/day). Results depend on your age and amount of lean body mass.
Another way of expressing the normal range for test results is:
- 14 to 26 mg per kg of body mass per day for men (123.8 to 229.8 µmol/kg/day)
- 11 to 20 mg per kg of body mass per day for women (97.2 to 176.8 µmol/kg/day)
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider 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
Damage to the tubule cells
Acute tubular necrosis (ATN) is a kidney disorder involving damage to the tubule cells of the kidneys, which can lead to acute kidney failure. The t...
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Kidney failure
Kidney failure
Acute kidney failure is the rapid (less than 2 days) loss of your kidneys' ability to remove waste and help balance fluids and electrolytes in your b...
Read Article Now Book Mark Article - Too little blood flow to the kidneys, causing damage to filtering units
Damage to filtering units
Glomerulonephritis is a type of kidney disease in which the part of your kidneys that helps filter waste and fluids from the blood is damaged....
Read Article Now Book Mark Article - Kidney infection (pyelonephritis)
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Muscle breakdown (rhabdomyolysis), or loss of muscle tissue (myasthenia gravis)
Muscle breakdown
Rhabdomyolysis is the breakdown of muscle tissue that leads to the release of muscle fiber contents into the blood. These substances are harmful to ...
Read Article Now Book Mark ArticleLoss of muscle tissue
Myasthenia gravis is a neuromuscular disorder. Neuromuscular disorders involve the muscles and the nerves that control them.
Read Article Now Book Mark Article -
Urinary tract obstruction
Urinary tract obstruction
Obstructive uropathy is a condition in which the flow of urine is blocked. This causes the urine to back up and injure one or both kidneys.
Risks
There are no risks with this test.
References
Landry DW, Gharavi AG. Approach to the patient with renal disease. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 100.
Oh MS, Briefel G, Pincus MR. Evaluation of renal function, water, electrolytes, and acid-base balance. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 15.
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Female urinary tract - illustration
The female and male urinary tracts are relatively the same except for the length of the urethra.
Female urinary tract
illustration
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Male urinary tract - illustration
The male and female urinary tracts are relatively the same except for the length of the urethra.
Male urinary tract
illustration
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Creatinine tests - illustration
A measurement of the serum creatinine level is often used to evaluate kidney function. Urine creatinine levels can be used as a screening test to evaluate kidney function, or can be part of the creatinine clearance test.
Creatinine tests
illustration
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Creatinine urine test - illustration
Urine creatinine levels can be used as a screening test to evaluate kidney function, or can be part of the creatinine clearance test.
Creatinine urine test
illustration
-
Female urinary tract - illustration
The female and male urinary tracts are relatively the same except for the length of the urethra.
Female urinary tract
illustration
-
Male urinary tract - illustration
The male and female urinary tracts are relatively the same except for the length of the urethra.
Male urinary tract
illustration
-
Creatinine tests - illustration
A measurement of the serum creatinine level is often used to evaluate kidney function. Urine creatinine levels can be used as a screening test to evaluate kidney function, or can be part of the creatinine clearance test.
Creatinine tests
illustration
-
Creatinine urine test - illustration
Urine creatinine levels can be used as a screening test to evaluate kidney function, or can be part of the creatinine clearance test.
Creatinine urine test
illustration
Review Date: 8/20/2023
Reviewed By: Jacob Berman, MD, MPH, Clinical Assistant Professor of Medicine, Division of General Internal Medicine, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.