Creat5hursrate
This test measures the amount of creatinine in your urine collected over a 5-hour period to help evaluate how well your kidneys are functioning.
{"Creatinine is a waste product that your kidneys filter from your blood","This test measures how much creatinine your body excretes in 5 hours","Results help doctors assess kidney function and detect kidney disease","A 5-hour urine collection is required for this test","Abnormal results may indicate kidney damage or other health conditions"}
Key facts at a glance
- LOINC
- 93734-2
- Short code
- U_CREA_5H
- Synonyms
- Creat 5h Ur-sRate
- Category
- kidney
- Sample
- urine
- Container
- Sterile urine container (plastic or glass)
- Units
- not specified
- Ref low
- 0.2
- Ref high
- 0.75
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–120 years
- Method
- Enzymatic or Jaffe colorimetric method
- CPT
- 82570
- SNOMED
- 271565005
- Specimen volume
- 5-10 mL minimum; entire 5-hour collection preferred for accurate measurement
- Stability
- Stable for 7 days at 2-8°C; stable for 3 months at -20°C
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The 5-Hour Urine Creatinine test measures the amount of creatinine in your urine over a 5-hour collection period. Creatinine is a chemical waste product produced by normal muscle metabolism and filtered out of your blood by your kidneys. When your kidneys are working properly, they remove creatinine from your blood and excrete it in your urine.
How is the test done?
You will be given a special container to collect all your urine over a 5-hour period. It's important to collect all urine during this time, as missing any sample can affect the accuracy of the results. You may be asked to avoid certain foods, medications, or intense exercise before and during the collection period, as these can affect creatinine levels.
Why is this test important?
This test helps doctors evaluate how well your kidneys are filtering waste from your blood. By measuring the amount of creatinine excreted in your urine over a specific time, your healthcare provider can determine your creatinine clearance rate, which is an important indicator of kidney function.
Reference range
0.2-0.75 mmol/h (adult; varies by sex and muscle mass)not specified
Complete timed urine collection over exactly 5 hours; no fasting or special diet required; avoid vigorous exercise before collection
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Do I need to fast before this test?
What happens if I miss some urine during the 5-hour collection?
Are there any risks with this test?
How long will it take to get results?
Sources
- 1
- 2
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy