Monitor patients receiving creatine supplementation.
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Plain Red, Serum Separator Tube (SST), Green (Sodium or Lithium Heparin), or Lavender (K2EDTA).
Separate from cells within 6 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.2 mL)
Ambient: 6 hours; Refrigerated: 1 week; Frozen: 6 months (Three freeze/thaw cycles are acceptable.)
Effective May 20, 2013
|10 years or less||37.0 - 117.0 µmol/L|
|11 years or greater||9.0 - 90.0 µmol/L|
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 order Creatine Disorders Panel, Plasma or Serum (ARUP test code 2002328) and/or Creatine Disorders Panel, Urine (ARUP test code 2002333).
|Component Test Code*||Component Chart Name||LOINC|
|2002342||Creatine, Serum/Plasma - mg/dL||2148-5|
- serum or plasma creatine