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Test Code RCRE Urine Creatinine, Random

Important Note

If ordering a timed collection use order code URCR

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