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HelpTest Code LAB721 Tissue Transglutaminase Antibody, IgG
Useful For
- Evaluating patients suspected of having celiac disease, including patients with compatible clinical symptoms, patients with atypical symptoms, and individuals at increased risk
- Screening test for dermatitis herpetiformis, in conjunction with endomysial antibody test
- Monitoring adherence to gluten-free diet in patients with dermatitis herpetiformis and celiac disease
Methodology
Enzyme-linked fluorescent immunoasay (EliA)
Performing Laboratory
Bozeman Outpatient Services at North 19th
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions: Allow specimen to clot. Spin down within 2 hours of collection.
Specimen Rejection:
1. Grossly hemolyzed or lipemic samples will be rejected.
2. Repeatedly freezing and thawing samples can cause analyte deterioration. Thaw only once.
Specimen Transport Temperature
Ambient <8 hours/Refrigerated >8 hours
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Ambient | 8 hours |
| Refrigerated | 14 days | |
| Frozen | 30 days |
Reference Values
Negative
<7.0 U/mL (negative)
7.0-10.0 U/mL (equivocal)
>10.0 U/mL (positive)
Day(s) Test Set Up
Monday, Wednesday, Friday
Turnaround Time: Same day as performed
Test Classification and CPT Coding
83516