Cortisol | 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 Invert blood 5 times after blood collection ensures the clot activator is well mixed with the blood. This will ensure results are reliable.
Specimen Storage/Transport	Do not take sample as soon as patient arrives. Allow for a period of rest.
Orderable as Urgent?	No
Turn Around Time	3 - 4 hrs
Reference Value(s)	8am adult: 102 - 535 nmol/L
Testing Laboratory Location	KKH
Laboratory	Clinical Chemistry
Contact Number	6394 1383
Day and Time Performed	Mon – Fri 0800 hrs – 1700 hrs Sat: 0800 hrs – 1230 hrs
Orderable on CPOE?	Yes
Downtime Form	Clinical Chemistry - Form A
Additional Information	Only cortisol 8 am is available

Change History Notes

15 Nov 2021 02:00 PM

Update Specimen Requirement, Specimen Storage/Transport, Turnaround Time and Additional Information.

Last Updated - 05 Apr 2025