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HelpTest Code CK Creatine Kinase (CK)
Laboratory Code
LAB62
Specimen Requirements
Submit only one of the following:
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | 2 days |
| Refrigerate | 7 days |
| Frozen | 1 month |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Reference Interval
| Age | Male |
|---|---|
| 0 – 12 yrs | 68 – 293 U/L |
| 13 – 17 yrs | 80 – 354 U/L |
| 18 – 59 yrs | 45 – 250 U/L |
| ≥ 60 yrs | 40 – 200 U/L |
| Age | Female |
|---|---|
| 0 – 12 yrs | 68 – 293 U/L |
| 13 – 17 yrs | 48 – 200 U/L |
| ≥ 18 yrs | 30 – 150 U/L |
Critical value: ≥ 10,000 U/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation and monitoring disorders of skeletal and cardiac muscle.
Service Code
31051
LOINC Code Information
2157-6
Alias
Creatine Phosphokinase (CPK)
Update
Last updated 10/03/2025