Adult patient:
Heparin gel tube
Minimum blood volume: 5 mL
Paediatric patient:
Paediatric heparin tube
Number of vials: 1
Minimum blood volume: 1.3 mL
Authorisation code required
No
24 Hr available service
Yes
(Call extension: 3353 for express result)
Method
Spectrophotometry
Reference interval
| Male: | 39 – 308 U/L |
| Female: | 26 – 192 U/L |
(Source: from manufacturer reagent insert 2015-05 V6.0)
Clinical indication
Levels of CK are increased in diseases affecting skeletal muscle.
It is a sensitive, but not specific test for the diagnosis and monitoring of myocardial infarction. CKMB with CKMB / CK ratio is more specific, but has been superseded by cardiac troponin T or I.
Result interpretation
CK levels may be increased in myocardial infarction, skeletal muscle injury (e.g. after intramuscular injection or excessive exercise), myositis, myopathy, rhabdomyolysis or hypothyroidism.
Cyanokit (Hydroxocobalamin) at therapeutic concentrations interferes with the result.
Measurement of uncertainty
Frequency of measurement
Daily