Creatine kinase (CK), serum | KK Women's and Children's Hospital

Specimen Container

Gel separator tube (Adult)
Microtube (Paeds)

Specimen Requirement

Plain Blood
Adult: 3 mL
Paediatric: 1.3 mL

Avoid collection after exercise or other strenuous activity.

Invert blood 5 times after blood collection ensures the clot-activating factors is well mixed with the blood. This will ensure results are reliable.

Orderable as Urgent?

Yes

Turn Around Time

Average 2 hrs (1 - 3 hrs)

Reference Value(s)

Age

Reference Range (U/L)

Female

Male

All

30 - 160

20 - 310

Testing Laboratory Location

KKH

Laboratory

Clinical Chemistry

Contact Number

6394 1383

Day and Time Performed

Daily, 24 hrs

Orderable on CPOE?

Yes

Downtime Form

Clinical Chemistry - Form A

Additional Information

Change in ADULT reference interval from 9th July 2014.
Previous reference interval was (U/L): Male 30-450; Female 25-200”

Change History Notes

Last Updated - 27 May 2025