Inhibitor Assay, PTT with Reflex to PTT 1:1 Mix, with Reflex to 1-Hour Incubation
Ordering Recommendation
Initial screen for inhibitor in plasma.
Mnemonic
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Sun-Sat
Reported
1-2 days
New York DOH Approval Status
Specimen Required
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Transfer 2 mL plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Serum. EDTA plasma, clotted or hemolyzed specimens.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
Reference Interval
Test Number |
Components |
Reference Interval |
---|---|---|
PTT, Inhibitor Screen | 32-48 seconds |
Interpretive Data
FDA
Note
If PTT is prolonged, a PTT 1:1 immediate mixing study will be added. If the immediate mixing study is normal, an incubated mixing study will be added. Additional charges apply.
Hotline History
CPT Codes
85730; if reflexed, add 85732; if reflexed add 85730; 85732
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
2003267 | PTT, Inhibitor Screen | 14979-9 |
Aliases
- Activated Partial Thomboplastin Time
- aPTT
- Circulating Anticoagulant
- Partial Thromboplastin Time
- Partial Thromboplastin Time 1:1
- Partial Thromboplastin Time Inhibitor Assay
- Partial Thromboplastin Time Mixing Study
- PTT
- PTT 1:1 Mix
- PTT Correction
- PTT Inhibitor Assay
- PTT Mixing Study