Thyroid Antibodies (TPO)
Department of Immunology
Notes
- Diagnosis of autoimmune thyroid disease.
- Serial measurements are not helpful.
Sample Requirements
Adult
5ml Gold-top SST tube or 3.5ml Rust-top gel tube (Trust users only)
Paediatric
1ml Serum Sample
Turnaround Times
1 week
Measuring Range
The measuring range (detection limit, upper limit) for EliA anti-TPO is from 4 to 1542 IU/ml. No hook effects could be observed for concentrations up to 7 fold above the measuring ranges.
Only values above the Detection Limits can be regarded as valid results. Results above the upper limit are reported as >1542.
Please note due to differing binding characterisitics of the antibodies in patient samples, not all sera can be diluted linearly within measurable range.
Reference Ranges
| Range (IU/ml) | Interpretation |
|---|---|
| <25 | Negative |
| 25-35 | Doubtful clinical significance |
| >35 | Clear positive |
Time Limit for Add-ons
2 weeks (whilst stored at 2°C - 8 °C)