vWF; von Willebrand Comprehensive Panel 2
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
Please submit a separate, frozen vial for each special coagulation assay ordered. Draw blood in a light blue-top tube containing 3.2% sodium citrate, mix gently by inverting 3-4 times. Centrifuge 15 minutes at 1500 g within one hour 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(s). Freeze immediately and transport on dry ice.
Partial Thromboplastic Time, Activated, Factor VIII Activity, Clotting; von Willebrand Factor Antigen, Ristocetin Cofactor, von Willebrand Factor Collagen Binding Assay and von Willebrand Antigen Multimeric Analysis.
Note: Storage of whole blood at refrigerated temperatures prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
85730, 85240, 85246, 85245, 83520, 85247
2/11/25
SA