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HelpTest Code FREE T3 T3 (Triiodothyronine), Free, Serum
Additional Codes
LAB137
Collection Method
Venous collection
Minimum Volume
0.5ml
Container
Gold Top SST
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
Reference or Target Ranges
| Age | Male | Female |
| < 1 month | comment 1 | comment 1 |
| 1 - 23 months | 3.3 - 5.2 | 3.3 - 5.2 |
| 2 -12 years | 3.3 - 4.8 | 3.3 - 4.8 |
| 13 - 20 years | 3.0 - 4.7 | 3.0 - 4.7 |
| > 18 years | 2.5 - 4.4 | 2.5 - 4.4 |
comment 1- Pediatric reference ranges have not been established by CPH laboratory services.
Reportable Units
pg/ml
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | 4300 mg/dL |
| Icterus Threshold | 33 mg/dL |
| Lipemia Threshold | 2000 mg/dL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Specimen Stability
| Ambient | Refrigerate ASAP |
| Refrigerated (4°C to 8°C) | 7 days |
| Frozen(-40°C to 0°C) | 1 month |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Routine: 4 hours |
| Stat Availability | No |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
84481
Last review/edit date
March 2024