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HelpTest Code PT-PTT Prothrombin Time with INR and PTT (PT/PTT)
Specimen Type
Plasma Na Cit
Specimen Requirements
Collection Container/Tube: Light-blue top (3.2% sodium citrate)
Specimen Type: Citrated Plasma
Specimen Volume: 1 mL plasma
Collection Instructions: Collection tube must be properly filled.
SPECIMEN PROCESSING AND HANDLING
Transport whole blood at room temperature if draw to analyze time is expected to be less than 4 hours.
If the specimen will be delayed longer than 4 hours, centrifuge specimen for 15 minutes at 2500-3500 rpm. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet (buffy) layer and place into an aliquot tube. Spin again, transfer to a new screw-cap vial, then freeze at -20° C. Ship on dry ice.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma Na Cit | Frozen (preferred) | 30 days |
| Ambient | 4 hours |
PERFORMING LAB
WKMC, WKB, WKP, WKS