Thyroid Stimulating Immunoglobulin
Also known as: TSIG
Use
This test is used to detect thyroid stimulating autoantibodies, which are indicative of conditions such as Graves disease (autoimmune hyperthyroidism). It aids in the diagnosis of autoimmune thyroid diseases by assessing the presence of these antibodies which can influence thyroid function.
Special Instructions
The specimen should be collected in a Serum Separator Tube (SST), Green (Lithium Heparin), or Lavender (K2EDTA) and allowed to clot completely at room temperature before separating from cells within 2 hours of collection. The specimen is then transferred to an ARUP Standard Transport Tube.
Limitations
This assay should be interpreted in conjunction with clinical examination, patient medical history, and other diagnostic findings. It detects the presence of thyroid stimulating immunoglobulins but does not diagnose all possible thyroid dysfunctions on its own. The clinical interpretation must consider the full clinical context.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 30567-2
Result Turnaround Time
0-1 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube.
Causes for Rejection
Unacceptable Conditions are not specified.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 24 hours |
| Refrigerated | 1 week |
| Frozen | 1 year |