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HelpTest Code TT3 T3 Total
Aliases
T3, Total Triiodothyronine
Patient Preparation
No special patient preparation required
Collection Method
Venous collection
Minimum Volume
- Adults: 1 mL
- Pediatric: 0.8 ml
Container
Lt Green / Plasma Separator / Lithium Heparin
Preferred Specimen
Light Green Top (lithium heparin) plasma
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
- Purple or Pink Top (K2/K3 EDTA)
Reference or Target Ranges
0.8 – 2.0 ng/mL
Reportable Units
ng/mL
Critical Value
Not defined for this assay
Reasons for Rejection
<!-- Rejection-->
| Hemolysis Threshold | 2000 mg/dL |
| Icterus Threshold | 35 mg/dL |
| Lipemia Threshold | 1800 mg/dL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Specimen Stability
<!-- Stability -->
| Ambient | 8 days |
| Refrigerated (4°C to 8°C) | 14 days |
| Frozen(-40°C to 0°C) | 1 year |
Performance Information
<!-- Performance information -->
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Routine: 4 hours |
| Stat Availability | No |
| Performing Bench | UH Chemistry |
| Methodology/Method Description | Roche Cobas – Competition principle |
CPT Codes
84480