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CK
MessageTest performed at York Hospital Labortory.
Test Code
CK
Alias/See Also
Creatine Kinase
Creatine Phosphokinase (CPK)
Creatine Phosphokinase (CPK)
CPT Codes
82550
Preferred Specimen
0.2 mL serum collected in a serum separator tube (SST)
Other Acceptable Specimens
0.2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: 4 hours
Refrigerated: 5 days
Frozen: 1 month
Refrigerated: 5 days
Frozen: 1 month
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed specimen
Methodology
Spectrophotometry
Setup Schedule
Daily
Report Available
Next Day
Available STAT 1/2 Hour
Available STAT 1/2 Hour
Reference Range
| Male | 55-170 U/L |
| Female | 30-135 U/L |
Clinical Significance
CK is commonly elevated in myocarditis of any cause, cerebrovascular accidents, rhabdomyolysis, polymyositis, and acute physical exertion. CK is also increased in the muscular dystrophies. Low CK may reflect decreased muscle mass or muscle wasting. Low serum CK activities are common in the elderly, in the bedridden, and in patients with advanced malignancy.
