Thyroid-Stimulating Immunoglobulin (TSI)
Collect SST/3 mL, after 30 minutes of clotting, promptly centrifuge and send.
Alternate sample: Red top, lavender EDTA or green top heparin. If collecting alternate, sample must be centrifuged within 2 hours, transfer 3 mL serum/plasma to a screw top transport tube, indicate sample type on tube and send.
The IMMULITE 2000 TSI assay designed for the specific Semi- Quantitative detection of stimulating autoantibodies using a bridging format and human TSH receptor fragment chimeric recombinant proteins.
Room temp: 14 days, Refrigerated: 14 days, Frozen: 14 days
The measurement of thyroid stimulating autoantibodies, in conjunction with other clinical and laboratory findings, is used as an aid in the diagnosis of patients suspected of having Graves’ disease.