ARUP's Laboratory Test Directory

Creatine Kinase, MB : 0080480

Mnemonic: CK MB

Ordering Recommendation: Cardiac troponins [troponin I (0090613) or troponin T (0098803)] are the recommended tests for diagnosis and management of acute coronary syndrome.
Methodology: Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Green (sodium or lithium heparin), plasma separator tube, serum separator tube.

Specimen Preparation: SST needs to sit for 15-20 minutes for proper clot formation and to assure the absence of fibrin in the serum which can interfere with this assay. Centrifuge and remove from cells ASAP or within 2 hours of collection. Specimens must be free of all particulate matter which can interfere with the assay. Transfer 2 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Remarks: CK-MB is quite labile. CK-MB relative percent will be calculated only if Creatine Kinase, Total, Serum or Plasma (ARUP test code 0020010) is ordered.

Unacceptable Conditions: Specimens exposed to repeated freeze/thaw cycles.

Stability (collection to initiation of testing): After separation from cells: Ambient: 8 hours; Refrigerated: 3 days; Frozen: 1 month

Reference Interval:
 
Test Number Components Reference Interval
 Creatine Kinase, Isoenzyme MB 0.0-5.0 µg/L
 CK-MB Relative Percent0.0-5.0%

CPT Code(s): 82553