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Lab Test Dictionary

von Willebrand Disease Panel with Collagen Binding Assay (CBA) (15540)


Synonyms

vWF; von Willebrand Comprehensive Panel 2

Specimen Type

Plasma

Performing Lab

Quest Diagnostics San Juan Capistrano


Epic ID

LAB4384


Collection Information

Specimen Required

(four-five) 1.8 mL or (three-four) 2.7 mL Blood

Container Type

Light Blue (Sodium Citrate)


Processing Information - Lab Use Only

Transport Temperature

Frozen-Only

Specimen Stability

Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 14 Days

Test Volume Required

1 mL (x4) Platelet-Poor Plasma

Minimum Test Volume

0.75 mL (x4) Platelet-Poor Plasma

Processing Instructions

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.


Included Tests

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.


Comments

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.


CPT Codes

85730, 85240, 85246, 85245, 83520, 85247


Revised

2/11/25

Initials

SA