Inhibitor Assay, PTT with Reflex to PTT 1:1 Mix, with Reflex to 1-Hour Incubation
2003266
Ordering Recommendation
 
Mnemonic
PTT INHIB
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Sun-Sat
Reported
1-4 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
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. Specimens refrigerated more than four hours. Hemolyzed specimens.  
Remarks
  
Stability
Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks  
Reference Interval
 
 
Test Number Components Reference Interval
 Partial Thromboplastin Time 32-​48 seconds
2003270Partial Thromboplastin Time 1:1 Mix (performed if PTT > 48 seconds) 32-​48 seconds
2003272Partial Thromboplastin Time 1 hour By report
 Partial Thromboplastin Time Inhibitor Screen 1 Hour, Mix By report
Interpretive Data
 
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.
CPT Code(s)
85730; if reflexed, add 85732; if reflexed add 85730; 85732
Components
Component Test Code*Component Chart Name
2003267PTT, Inhibitor Screen
* 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
  • Partial Thromboplastin Time
  • Partial Thromboplastin Time 1:1
  • Partial Thromboplastin Time Inhibitor Assay
  • Partial Thromboplastin Time Mixing Study
  • PTT
  • PTT 1:1 Mix
  • PTT Inhibitor Assay
  • PTT Mixing Study