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HelpTest Code TSH Thyroid Stimulating Hormone (TSH)
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | Send the sample to the laboratory immediately |
| Refrigerate: | 7 days |
| Frozen: | 6 months |
Reference Interval
| Age | |
|---|---|
| 4 days - 5 mths | 0.73-4.77 mIU/L |
| 6 mths - 13 yrs | 0.70-4.17 mIU/L |
| 14 yrs - 18 yrs | 0.47-3.41 mIU/L |
| ≥19 yrs | 0.35-4.94 mIU/L |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31622
Update
Last updated 16/05/2024
Updated on Methodology.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of hyperthyroidism and hypothyroidism. Monitor thyroxine replacement or suppression therapy. Distinguish non-thyroidal illness (NTI) from hyperthyroidism.