Platelet Poor Plasma

Refer to Blue Top Tube (3.2% Sodium Citrate) Collection Instructions

1. Centrifuge specimen in a centrifuge that has been validated to ensure platelet poor plasma.
2. Immediately transfer the plasma to a stoppered, plastic tube and centrifuge again for 10 minutes. 
3. Transfer the supernatant plasma into a screw-capped, plastic vial and send frozen at ≤ -20°C, if possible.
4. If unable to centrifuge, forward unprocessed sodium citrate whole blood (minimum volume: 2 mL) to the laboratory promptly at room temperature only.

 The unspun specimen must arrive within 2 hours of collection.

85245 - VWF Activity (EAP 30023010)

Note: VWF AG “von Willebrand Factor Antigen, Plasma” and
FVIII “Coagulation Factor VIII (8) Assay, Plasma” are recommended in
conjunction with VWF ACT “von Willebrand Factor Activity, Plasma.”