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Creatine Kinase, MB
Labcorp test code: 120816
Test CodeCRKMB
Alias/See Also
CRKMB
LAB0001821
LAB0001821
CPT Codes
82553
Includes
CK-2
CK-MB
CK-MB
Preferred Specimen
1 mL serum from Gold top tube
Patient Preparation
The MB isoenzyme of CK is most commonly elevated in acute myocardial infarction (AMI). In AMI, plasma CK-MB typically rises some four to six hours after the onset of chest pains, peaks within 12 to 24 hours, and returns to baseline levels within 24 to 48 hours. The pattern of serial CK-MB determinations is more informative than a single determination.
Minimum Volume
0.7 mL serum
Other Acceptable Specimens
Serum from Red top tube
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: 1 day
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
Methodology
Electrochemiluminescence immunoassay (ECLIA)
Reference Range
• Male: 0.0−10.4 ng/mL
• Female: 0.0−5.3 ng/mL
Performing Laboratory
Labcorp
