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Creatine Kinase, MB
Test Code2140
Alias/See Also
CARDIAC ENZYME; CK, MB; ISO ENZYME; CK ISOENYME
Preferred Specimen
One 3 mL green (sodium or lithium heparin), plasma separator tube, or 4 mL serum separator tube.
Minimum Volume
2 mL plasma or serum, frozen. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Transport Temperature
2 mL plasma or serum, frozen. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Specimen Stability
After separation from cells: Ambient: 8 hours; Refrigerated: 2 days; Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens exposed to repeated freeze/thaw cycles.
Methodology
Chemiluminescent Immunoassay
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
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. Specimens must be free of all particulate matter which can interfere with the assay. If testing cannot be performed within 48 hours from collection, ship frozen. CK-MB is quite labile. CK-MB relative percent will be calculated only if Creatine Kinase, Total, Serum or Plasma (0020010) is ordered.
