Free T4 and TSH | KK Women's and Children's Hospital

Specimen Container	Gel separator tube (Adult) Microtube (Paeds)
Specimen Requirement	Plain Blood Adult: 5 mL Paediatric: 1.3 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	Refer to individual test information.
Reference Value(s)	Refer to individual test information.
Testing Laboratory Location	KKH
Laboratory	Clinical Chemistry
Contact Number	6394 1383
Day and Time Performed	Refer to individual test information.
Orderable on CPOE?	Yes
Downtime Form	Clinical Chemistry - Form A

Change History Notes

27 May 2024 08:00 AM

Update of Specimen Requirement.
15 Oct 2021 04:00 PM

Updated Specimen Requirement and Turn Around Time and Reference Value(s).

Last Updated - 05 Apr 2025