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Thermal Amplitude Test
Ordering Recommendation
Use to determine the clinical significance of cold reacting autoantibodies. Before ordering the Thermal Amplitude Test, results from RBC Antibody ID Package (IRL) (3017610) are required to identify specific antibodies that may interfere with testing.
New York DOH Approval Status
Specimen Required
Three 7 ml lavender (K2EDTA) or pink (K2EDTA)
Maintain tubes at 37°C until separated from cells. Centrifuge samples to separate plasma from the red blood cells and place in ARUP standard transport tubes. Transport packed red blood cells (in original EDTA tubes) AND plasma (in ARUP standard transport tubes). (Min: 7 mL red blood cells and 10 mL plasma)
Refrigerated.
Separator or gel tubes.
Ambient: Unacceptable; Refrigerated: 1 week; Frozen: Unacceptable
Methodology
Qualitative Hemagglutination (HA)
Performed
Mon-Fri
Reported
2-5 days
Reference Interval
Interpretive Data
Standard
Note
Prior to ordering the thermal amplitude test, results from the Antibody ID Package (IRL) (ARUP test code 0013003) are required to identify specific antibodies that may interfere with testing. If Antibody ID Package has not been performed at ARUP within the last 7 days, the test will be added on by ARUP Laboratories and performed. Additional charges apply. Depending on antibody complexity, additional testing may be required. Additional charges apply. Client must provide patient transfusion history.
Hotline History
Hotline History
CPT Codes
86870; additional CPT codes may apply
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0013410 | Thermal Amplitude Test |
Aliases
- Cold Autoantibody Evaluation
- Thermal Amplitude
