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Click on the first letter of test name, or select test group, to review specifications:

 

PTT MIXING STUDY

Alternate Names: Activated Partial Thromboplastin Time Mixing Study,
PTT Inhibitor Screen,
PTT Substitution Test
Performed: Daily, 24 Hours
Methodology: Photo Optical Clotting
Turnaround Time: Routine: 4 Hours
Stat: < 3 hours

Container / Specimen Requirements

 
    Container / Tube: Blue Vacutainer® tube (sodium citrate)
    Minimum Volume (tube drawn to FULL draw)

5 mL tube:

4.5 mL

3 mL tube:

2.7 mL

2 mL tube:

1.8 mL
Special Handling or Timing of Specimen: None
Preparation of Patient: None
Reference Range: Mix should correct to 25.0 - 38.0 seconds
Causes for Specimen Rejection:  Improper labeling.
Clotted specimens.
Hemolysis.
Specimens diluted with I.V. fluid or contaminated with heparin.
Specimens that are too old.
Tubes must be filled to top of blue line on label.
CareManager Test Group:
CareManager Name/Alias:
LAB
PTT
Specimen Labeling: Click here for policy

 

 
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