Potassium | KK Women's and Children's Hospital

Specimen Container	Gel separator tube (Adult) Microtube (Paeds)
Specimen Requirement	Plain Blood Adult: 3 mL Paediatric: 0.5 mL 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)	<1st month: 3.7-5.9 mmol/L 1st month - 11th month: 4.1-5.3 mmol/L 1st year - 13th year: 3.4-4.7 mmol/L >13th year: 3.5-5.1 mmol/L
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	Critical Value: <1st month: <2.5 mmol/L(Low) and >7.0 mmol/L(High) >1st month: <2.5 mmol/L(Low) and >6.0 mmol/L(High)

Change History Notes

Last Updated - 28 May 2025