Home
HelpTest Code 4919 Von Willebrand Factor Antigen
Specimen Type
Plasma
Container
Blue Sodium Citrate
Minimum Volume
Fill blue top tube to the indicated line during collection. A minimum of 0.5 mL of platelet poor plasma must be submitted for testing.
Stability
30 days frozen
Transfer Instructions
Transport separataed plasma on dry ice.
CPT
85246
Result Information
| Result Code | Result Name |
| 85991141 | VWF Ag |
Special Handling
Centrifuge light blue-top tube within 1 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.