Tests:Thyroid Stimulating Hormone, Serum: Difference between revisions
Tests:Thyroid Stimulating Hormone, Serum
Created page with "{{DISPLAYTITLE: Thyroid Stimulating Hormone, Serum}} Full Test List Biochemistry Tests {| class="wikitable" ! colspan="2" | == Overview == |- |Department |Biochemistry |- |Test Code |PTSH |- |Synonyms |Thyroid Stimulating Hormone hTSH Ultrasensitive TSH II Thyrotropin |- |Test Availability |Monday - Sunday, testing routinely available out of hours |- |Turnaround Time |1 day |- |Stability – Add test |5 days |- ! colspan="2" | == Specimen Requir..." |
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Thyrotropin | Thyrotropin | ||
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| | |Availability | ||
|Monday - Sunday, testing routinely available out of hours | |Monday - Sunday, testing routinely available out of hours | ||
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== Specimen Requirements == | == Specimen Requirements == | ||
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|Specimen | |Specimen | ||
|Serum | |Serum | ||
Plasma | Plasma | ||
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== Aliquot Requirements == | == Aliquot Requirements == | ||
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|Sample | |Sample | ||
|Serum | |Serum | ||
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Revision as of 15:19, 20 March 2025
Overview | |
|---|---|
| Department | Biochemistry |
| Test Code | PTSH |
| Synonyms | Thyroid Stimulating Hormone
hTSH Ultrasensitive TSH II Thyrotropin |
| Availability | Monday - Sunday, testing routinely available out of hours |
| Turnaround Time | 1 day |
| Stability – Add test | 5 days |
Specimen Requirements | |
| Specimen | Serum
Plasma |
| Preferred | 6 mL Red-Top |
| Acceptable | 6 mL SST Yellow-Top or 4 mL Li-Hep Green-Top |
| Unacceptable | |
| Specimen Transportation | |
| Paediatric Requirements | 2 full Li-Hep Microtainer |
Aliquot Requirements | |
| Sample | Serum |
| Preferred Volume | 1 mL |
| Minimum Volume | 0.3 mL |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | 0.4 - 4.0 mIU/L |
| Test Method | Ci8200 analyser |
| Advanced Notice | Not required |
| Patient Preparation | Not required |
Comments | |
| A TSH will be performed automatically if Free T4 is less than 10 pmol/L.
A normal TSH result excludes thyrotoxicosis in 99% of cases. A normal TSH coupled with a raised Free T4 is suggestive of Euthyroid Hyperthyroxinemia due to illness, drugs or protein binding abnormalities. A TSH result of less than 0.3 mIU/L is consistent with Thyroid Autonomy (eg. Goitre), hyperthyroidism or Thyroxine treatment. TSH may be suppressed in otherwise euthyroid patients in cases of non-thyroidal illness, first trimester pregnancy, goitre, thyroid autonomy and after major surgery. Heterophile antibodies in the serum of certain individuals regularly exposed to animals or who have been treated with animal serum products are known to cause interference with immuno assays. | |