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Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

Potassium (whole Blood)

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Tube type: Lithium Heparin

Special instructions

Reference Range
Newborn 3.7-5.9
Child 3.4-4.7
Adult 3.5-4.5


Turnaround Time
1 day

Department: Biochemistry

Clinical Application
As potassium has a much higher intracellular concentration than extra-cellular concentration, factors which increase the amount of intracellular potassium leaking into extra-cellular fluid may cause a falsely high result. E.g. an old or haemolysed sample.


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