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HelpTest Code TYP Thyroid Screen in Pregnancy
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: | 6 days |
| Frozen: | 1 month |
Reference Interval
| Trimester | TSH (mIU/L) | FT4 (pmol/L) |
|---|---|---|
| 1 | 0.16 – 3.78 | 10.9 – 17.7 |
| 2 | 0.34 – 3.51 | 9.3 – 15.2 |
| 3 | 0.34 – 4.32 | 7.9 – 14.1 |
Days and Times Performed
24 hours, TAT 1 day
Methodology
See individual test listings for Methodology
THYROID STIMULATING HORMONE (TSH) IN PREGNANCY
THYROXINE, FREE (FT4) IN PREGNANCY
Service Code
31620
Update
Last updated 26/2/2022
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of thyroid disorders. Monitoring thyroxine replacement or suppression therapy.
Panel Information
Profile includes the following tests:
- Thyroxine, Free (FT41)
- Thyroid Stimulating Hormone (TSH1)