Creat2hurmcnc
This test measures the amount of creatinine in a 2-hour urine sample to help assess kidney function.
{"Creatinine is a waste product from muscle metabolism filtered by kidneys","The 2-hour urine collection helps evaluate how well your kidneys are working","Abnormal results may indicate kidney disease or dysfunction","The test is often used alongside blood creatinine tests for comprehensive kidney assessment","Proper urine collection timing is crucial for accurate results"}
Key facts at a glance
- LOINC
- 57344-4
- Short code
- CR2U
- Synonyms
- Creat 2h Ur-mCnc
- Category
- kidney
- Sample
- urine
- Container
- Sterile urine collection container or 24-hour urine container with preservatives as needed
- Units
- not specified
- Ref low
- 20
- Ref high
- 300
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- Enzymatic or Jaffe kinetic colorimetric method
- CPT
- 82570
- SNOMED
- 271295004
- Specimen volume
- Aliquot of 1-5 mL from well-mixed 2-hour collection
- Stability
- Room temperature: 24-48 hours; Refrigerated (2-8°C): 5-7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What is this test?
The 2-hour urine creatinine test measures the concentration of creatinine in your urine over a 2-hour collection period. Creatinine is a natural waste product produced by your muscles as part of normal daily activity. Healthy kidneys filter creatinine from your blood and excrete it in urine. This test helps doctors understand how well your kidneys are performing this important filtration function.
During the test, you will collect all urine produced during a 2-hour period into a special container provided by your healthcare provider. It's important to follow the collection instructions carefully, including when to start and stop collecting, and how to store the sample properly.
Reference range
20-300 mg/dLnot specified
Timed 2-hour urine collection (empty bladder at start time and collect all urine thereafter); no fasting required
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
The 2-hour urine creatinine test is primarily used to assess kidney function. Elevated creatinine levels in urine may indicate kidney disease, muscle breakdown, or certain metabolic conditions. Low levels might suggest reduced muscle mass, severe kidney disease, or improper urine collection. This test is often combined with blood creatinine measurements to calculate creatinine clearance rate, which provides a more complete picture of kidney function. Doctors may use results to monitor existing kidney disease, screen for kidney problems, or evaluate the effectiveness of treatments.
Frequently asked questions
Why do I need to collect urine for exactly 2 hours?
Does this test require fasting?
What can affect my urine creatinine results?
Is the test painful?
How long does it take to get results?
Sources
- 1
- 2
- 3
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