Ordering Recommendation

Initial screen for inhibitor in plasma.

New York DOH Approval Status

This test is New York state 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

Methodology

Electromagnetic Mechanical Clot Detection

Performed

Sun-Sat

Reported

1-2 days

Reference Interval

Test Number
Components
Reference Interval
  PTT, Inhibitor Screen 32-48 seconds

Interpretive Data



Compliance Category

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

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