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Creatine, Serum or Plasma

Test Codes

EPIC: LAB5996, Beaker: XCRES, ARUP: 2002340

Department

Send Outs

Instructions

Caution: Please be careful not to confuse Creatine, Serum with the in-house Creatinine, Serum.

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube, Dark Green-top Lithium or Sodium Heparin tube or Lavender-top EDTA tube.

Send specimen for processing immediately after collection.

Physician Office/Draw Specimen Preparation

Centrifuge to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and freeze (-20°C/-4°F or below) immediately.

Preparation for Courier Transport

Transport: 1.0 mL serum or plasma, frozen (-20°C/-4°F or below). (Minimum: 0.2 mL)

Rejection Criteria

Specimens not collected and processed as indicated.

In-Lab Processing

Centrifuge to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and freeze (-20°C/-4°F or below) immediately.

Transport: 1.0 mL serum or plasma, frozen (-20°C/-4°F or below). (Minimum: 0.2 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 6 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 6 months

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to ARUP Laboratories, Salt Lake City, UT.

Performed

Monday.
Results are available in 3-10 days.

Reference Range

By report.

Test Methodology

Liquid Chromatography/Tandem Mass Spectrometry.

CPT Codes

82540

Contacts

Last Updated

10/3/2023