Laboratory Medicine
Test catalogue
Thyroid Stimulating Hormone | |
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Test NameThyroid Stimulating Hormone |
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Specimen Type/RequirementsContainer Type = 1 Gold Top (Adult) or 1 Lithium Heparin (Baby) Minimum Testing Volume = 2 ml Blood |
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Specimen HandlingCollection Instructions: Collect sample in gold top vacutainer(SST) for adult or 2mL green top vacutainer (lithium heparin) for pediatric samples. Ensure sample is well mixed. Write your initials, date and time of collection on the collection label or requisition. Laboratory Staff Instructions: Only the endocrinology paper requisition has unrestricted access to ordering FT4, FT3. If you get the endocrinology paper requisition and FT4 or FT3 is ticked off, please order it. If you get any other paper requisition that says “FT4, FT3” on it (from any other location, including FHT or emergency), only order the TSH reflex test code. Do not order FT4 or FT3. The reflex will make sure that FT4 or FT3 is measured if TSH is abnormal. Rejection Criteria: Grossly hemolysed or lipemic specimens, Unlabeled or Not Sufficient Quantity Samples will be rejected. Stability: Samples is stable for 18hrs at room temperature, 7 days at 2-8°C and 3 months frozen at -20◦C or lower. Transportation: Send sample to core lab as soon as possible. |
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Required Documentation |
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Turnaround Time (TAT)1 days |
Test UtilizationFT4 will only be processed when TSH is (Endocrinology has unrestricted access) |
Reference Value0.4 - 5.5 mU/L |
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Test CodeTSH (Reflex), TSHNR (No-Reflex) |
MethodologyTwo-Site, Immunoenzymatic Sandwich Assay |
Testing LocationSMH-Biochemistry |
Other InformationLast Updated: April 05, 2022 |