vWF
Plasma
Quest Diagnostics San Juan Capistrano
LAB4384
(four-five) 1.8 mL or (three-four) 2.7 mL Blood
Light Blue (Sodium Citrate)
Frozen-Only
Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 14 Days
1 mL (x4) Platelet-Poor Plasma
0.75 mL (x4) Platelet-Poor Plasma
Platelet Poor Plasma: Centrifuge light blue-top tube 15 minutes at approx. 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and send frozen.
Partial Thromboplastic Time, Activated; Factor VIII Activity, Clotting; von Willebrand Factor Antigen; Ristocetin Cofactor; von Willebrand Factor Collagen Binding Assay; von Willebrand Antigen Multimeric Analysis
Storage of whole blood at refrigerated temp prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
85730, 85240, 85246, 85245, 83520, 85247
05-15-19
SL