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HelpTest Code 4010130 Creatine Phosphokinase (CPK, CK)
Specimen Requirements
1.0 mL serum or plasma
NOTE: Serum/plasma should be separated from cells
within 2 hours of collection.
Container
PST (light green top) tube or SST (tiger, gold, or red top) tube
Minimum Volume
65 µL serum/plasma
Stability
7 days at 2-8°C
May be frozen at -20°C for longer storage
Reject Due To
Improperly labeled sample
Analytical Time
Same day
Sample Retention Time
7 days
CPT Code
82550
Method
Photometry
Performing Laboratory
Springfield Hospital Laboratory