ARUP's Laboratory Test Directory

Creatine, Urine : 2002343

Mnemonic: CRTN URINE

Methodology: Liquid Chromatography/Tandem Mass Spectrometry
Performed: Mon
Reported: 2-9 days
Specimen Required: Collect: Random urine.

Specimen Preparation: Transfer 2 mL urine to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: Specimens exposed to more than one freeze/thaw cycle.

Stability (collection to initiation of testing): Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 2 weeks
Reference Interval:
Effective May 20, 2013
Less than 4 years 23 - 1500 mmol/mol
4-10 years 24 - 890 mmol/mol
11-150 years 10 - 370 mmol/mol

Interpretive Data: For random or timed specimens other than 24 hrs, the result represents the total milligrams of creatine excreted during the collection period.

Reference ranges for creatine have been established for random urine collections, in mmol/mol creatinine.

See Compliance Statement B: www.aruplab.com/CS
Note: To evaluate inherited disorders of creatine metabolism or transport, please use Creatine Disorders Panel, Plasma or Serum (2002328) and/or Creatine Disorders Panel, Urine (2002333).
CPT Code(s): 82540