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HelpTest Code FFTSI Thyroid-stimulating Immunoglobulin (TSI)
Specimen Required
Collection Container/Tube:
Preferred: Red-top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 3 mL
Collection Instructions:
1. Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable.
2. Within 2 hours of draw, centrifuge and aliquot 3 mL of serum into a plastic vial.
3. Send refrigerate.
Method Name
IMMULITE 2000 TSI
Reporting Name
Thyroid Stim ImmunoglobulinSpecimen Type
SerumSpecimen Minimum Volume
0.3 mL (Note: This volume does not allow for repeat testing.)
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Ambient | 14 days | ||
| Frozen | 14 days |
Reject Due To
| Gross hemolysis | Reject |
| Thawing | Cold OK; Warm OK |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Reference Values
0.00-0.55 IU/L
Day(s) Performed
Monday through Friday
Report Available
4 to 8 daysPerforming Laboratory
LabCorp BurlingtonCPT Code Information
84445
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FFTSI | Thyroid Stim Immunoglobulin | Not Provided |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FFTSI | Thyroid Stim Immunoglobulin | 30567-2 |