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Test Code CK Creatine Kinase (CK), Serum

Reporting Name

Creatine Kinase (CK), S

Useful For

Diagnosing and monitoring myopathies or other trauma, toxin, or drug-induced muscle injury

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Necessary Information


Patient's age and sex are required.



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.


Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  28 days
  Ambient  48 hours

Reference Values

Males

≤3 months: not established

>3 months: 39-308 U/L

Females

≤3 months: not established

>3 months: 26-192 U/L

Reference values have not been established for patients that are less than 3 months of age.

Note: Strenuous exercise or intramuscular injections may cause transient elevation of creatine kinase (CK).

Day(s) Performed

Monday through Sunday

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82550

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CK Creatine Kinase (CK), S 2157-6

 

Result ID Test Result Name Result LOINC Value
CK Creatine Kinase (CK), S 2157-6

Report Available

Same day/1 to 2 days

Reject Due To

Gross hemolysis Reject

NY State Approved

Yes

Method Name

Photometric, Creatine Phosphate + ADP