Monitor patients receiving creatine supplementation. May be useful when evaluating for possible creatine transporter deficiency; however, the preferred test is Creatine Disorders Panel, Urine (2002333).
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Random Urine or 24 Hour Urine, refrigerate during collection.
Transfer 2 mL aliquot from a well-mixed random collection or 24 hour urine to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.5 mL)
24 Hour Urine: Submit with order time of collection, and volume.
Ambient: 6 hours; Refrigerated: 24 hours; Frozen: 6 months (Three freeze/thaw cycles are acceptable.)
Effective May 20, 2013
|Less than 4 years||23 - 1500 mmol/mol creatinine|
|4-10 years||24 - 890 mmol/mol creatinine|
|11-150 years||10 - 370 mmol/mol creatinine|
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.
Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
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).
|Component Test Code*||Component Chart Name||LOINC|
|2002344||Creatine, Urine - mg/24hr||2150-1|
- Urine creatine