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HelpTest Code RCRE Urine Creatinine, Random
Specimen Type
Urine, random
Container/Tube
Sterile Urine Container
Offsite Collection Instructions
1. Collect without additives or preservatives.
2. Random urine collections only.
3. Transport refrigerated (2-8° C).
Turnaround Time
4 hours
Test Includes
Quantitative determination of creatinine in urine
Preferred Volume
0.5 mL
Specimen Minimum Volume
0.2 mL
Reject Due To
N/A
DAY(S) AND TIME(S) PERFORMED
24 hours, 7 days a week including holidays.
STAT DAY(S) AND TIME(S) PERFORMED
N/A
STAT Turnaround Time
N/A
Method Name
Kinetic Colorimetric Assay based on the Jaffé Method.
Synonyms
N/A
Test Limitations
The presence of ketone bodies can cause artificially high
results in urine. High homogentisic acid concentrations in
urine
samples lead to false results.
If preservatives need to be used for other analyte orders,
collect sample using Hydrochloric Acid (6N HCl) or Boric Acid
(5
g/L).
Test Usage
The assay of creatinine in urine helps with the diagnosis
and
treatment of renal disease and renal dialysis. If the Urine
Protein/Urine Creatinine ratio is needed please order test code
RPRCR. A more
sensitive test and better
estimation of glomerular filtration rate (GFR) is given by the
creatinine clearance test, test
code CCLR.
UCMC Collection Instructions
1. Collect without additives or preservatives.
2. Random urine collections only.
3. Transport refrigerated (2-8° C).
Reference Values
Reference ranges for random urine specimens have not been
established; subject to ordering physician interpretation only.
Additional Information
N/A
Stability: Room Temp
3 days
Stability: Refrigerated
8 days
Stability: Frozen
3 weeks