Thyroid Stimulating Hormone (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	3 - 4 hrs
Reference Value(s)	TSH reference imtevals for women with singleton pregnancies 15-50 years old (inclusive) - Cord: <25.00 mIU/L - <3rd day: 1.00-20.00 mIU/L - 3rd-30th day: 0.50-6.50 mIU/L - 1st-5th month: 0.50-6.00 mIU/L - 6th month-18th year: 0.50-4.50 mIU/L - Adult: 0.45-4.50 mIU/L TSH reference intervals for women with singleton pregnances 09 to 14 wks gestation: 0.01 - 2.39 mIU/L 18 to 22 wks gestation: 0.33 - 3.33 mIU/L 28 to 32 wks gestation: 0.37 - 3.49 mIU/L 34 to 39 wks gestation: 0.38 - 3.28 mIU/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	Critical Value: - TSH, Cord: > 30 mIU/L - TSH, Serum: > 30 mIU/L

Change History Notes

27 May 2024 08:00 AM

Update of Specimen Requirement.
03 Dec 2021 08:10 AM

Updated Specimen Requirement, Turn Around Time, Reference Value(s), Date and Time Performed and Additional Infomation.

Last Updated - 05 Apr 2025