Equal mix, aPTT

Alphabetical Test listing

Equal mix, aPTT-501

  
Equal mix, aPTT
  
501
  
85732.0
  
EQA
  
Activated partial thromboplastin time mixing study
APTT mixing study
  
  • APTT
  • If appropriate, normal plasma APTT, equal mix APTT (immediate) and equal mix APTT (incubated 60 minutes)
  
Sodium citrate (Na cit) plasma
  

Lt blue Sodium citrate (Na Cit) - 2.7mL

If the patient has a hematocrit >55, a specially prepared Lt blue Sodium citrate (NaCit) tube must be used in place of the standard Lt blue Sodium citrate (NaCit) tube.

Hematocrit-Anticoagulant adjustments

  
1.5 mL
  
  • Do not over or under fill tube as the ratio of anticoagulant to whole blood is critical

Coag – tube fill guidelines

  • Mix by gentle inversion 3 - 4 times
  
  1.  
  
  
Sodium citrate (Na cit) whole blood - STAT requests only
  
2.7 mL
  

Send whole blood sample in original collection container with STAT courier.

Must be tested within 4 hours of collection.

  

Lt blue Sodium citrate (NaCit) - 2.7mL

  

Plasma:

Frozen (strict)

Whole blood:

Ambient - 4 hours

Refrigerated - NO

  
  • Improper label (unlabeled or mislabeled)
  • Improper anticoagulant
  • Improperly filled tube
  • Hemolysis
  • Clotted specimen
  • Delay in transport
  • Improper storage/transport temperature
  • Grenier tubes are not acceptable
  
AHL - Coagulation: W
  
Daily
  
1 - 2 days
  

Clot Based Assay

  

See report

  
85730
85732 (if appropriate)
  
Yes
  
  
11/30/2001
  
01/13/2021
  
02/17/2020