Ordering Recommendation

Initial screen for inhibitor in plasma.

Mnemonic
PTT INHIB
Methodology

Electromagnetic Mechanical Clot Detection

Performed

Sun-Sat

Reported

1-2 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation

Transfer 2 mL plasma to an ARUP Standard Transport Tube. (Min: 1 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Serum. EDTA plasma, clotted or hemolyzed specimens.

Remarks
Stability

Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks

Reference Interval
Test Number
Components
Reference Interval
  PTT-LA Screen (PTT-D) 32-48 seconds
2003270 Partial Thromboplastin Time 1:1 Mix (performed if PTT > 48 seconds) 32-48 seconds
2003272 Partial Thromboplastin Time 1 hour By report
  PTT, Inhibitor Screen By report

Interpretive Data



No compliance statements are in use for this test.

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
N/A
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
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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
Inhibitor Assay, PTT with Reflex to PTT 1:1 Mix, with Reflex to 1-Hour Incubation