Home
HelpTest Code TYP Thyroid Screen in Pregnancy
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 6 days |
| Frozen | 1 month |
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
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 |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of thyroid disorders.
Monitoring thyroxine replacement or suppression therapy.
Service Code
31620
Update
Last updated 13/03/2025
Panel Information
Panel includes the following tests:
Laboratory Code
LAB3040178
LOINC Code Information
See individual test listings for LOINC code information.