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Creatine kinase, Total, Plasma / Serum

Item Value
Approval req'd? No
Available Stat? Yes
Test code CK
Performed by Parnassus, Mission Bay & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Spectrophotometric, kinetic
Container type Light green top preferred, Gold top acceptable
Amount to Collect 1 mL blood
Click here for Microdetermination info
Sample type Plasma or serum
Preferred volume 0.5 mL plasma or serum
Min. Volume 0.2 mL plasma or serum
Click here for Microdetermination info
Units U/L
Normal range Male:
0-4 years 41-277 U/L
5-9 years 54-269 U/L
10-14 years 38-255 U/L
≥ 15 years 50-388 U/L

0-4 years 34-204 U/L
5-9 years 44-189 U/L
10-14 years 28-170 U/L
≥ 15 years 37-241 U/L

1. Normal range for 1 to 15 year old children adapted from Beckman Coulter's "Pediatric Reference Range Guidelines for Synchron Systems" Bulletin 9345
2. Normal range for adults was determined by testing 270 male and female healthy blood donors at UCSF. Adult range adopted for children 15-18 years.
Synonyms CPK; CK; Creatine phosphokinase
Stability Room temperature 4 hours, refrigerated 12 hours, frozen at -20C 3 days.
Turn around times STAT 1 hour, Routine 4 hours
Additional information Levels are increased by IM injection or exercise. Hemolysis may artifactually
increase the result.
CPT coding 82550
LOINC code 2157-6
Last Updated 7/24/2015 8:50:47 AM
Entry Number 216
Lab Procedure Link Click here for Procedure
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