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88620:THYROID STIMULATING IMMUNOGLOBULIN (TSI) | |||||||||
Alias Names: | TSI | ||||||||
Methodology: | Bioassay / Chemiluminescence (CL) | ||||||||
Edit Date: | 11/15/2006 | ||||||||
Performed: | Monday, Tuesday, Thursday, Saturday | ||||||||
Released: | 2-5 days after setup at PeaceHealth Laboratories’ reference lab. | ||||||||
CPT Code: | 84445-90 | ||||||||
Specimen Collection Details | |||||||||
Collection: | One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube. | ||||||||
Handling: | Allow to clot, centrifuge and separate serum from cells into a plastic vial. Freeze. Allow no more than one freeze/thaw cycle. If multiple tests are ordered, send separate specimen for this test. | ||||||||
Stability: | Specimen stable 2 hours ambient, 6 days refrigerated, or 3 months frozen. | ||||||||
Standard Volume: | 1 mL serum. | ||||||||
Minimum Volume: | 0.7 mL serum. | ||||||||
Transport: | Frozen on dry ice. | ||||||||
Rejection Criteria: | Plasma; specimen frozen and thawed more than once. |
Negative |
≤ 109% basal activity
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Indeterminate |
110- 129% basal activity
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Positive |
≥ 130% basal acitvity is consistent with Graves’ disease.
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