Sodium | 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	Urgent: 1 hour Routine: Average 2 hrs (1 - 3 hrs)
Reference Value(s)	<1st month: 133-146 mmol/L 1st month-11th month: 139-146 mmol/L 1st year-13th year: 138-145 mmol/L >13th year: 136-145 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 Low: <125 mmol/L High: >155 mmol/L

Change History Notes

Last Updated - 21 Jun 2025