vWF Antigen, Ref Lab
Alternate Names
von Willebrand Ag, 086280 LC, Antigenic Factor VIII, CRM Assay
SoftLab Order Code
VWF
Epic Order Name
VON WILLEBRAND FACTOR AG, REF LAB LC 086280
Epic Order ID
LAB757
Laboratory
Reference Lab
Sample Type
Plasma
Collection Container
Blue Top (Sodium Citrate - Light blue)
Collecting Volume
One full light blue top tube
Minimum Collecting Volume
One full light blue top tube
Storage or Stability
Frozen
Causes for Rejection
Gross hemolysis; clotted specimen; frozen specimen thawed in transit
Patient Preparation
Avoid warfarin (Coumadin(R)) therapy for two weeks and heparin therapy for two days prior to the test. Do NOT draw from an arm with a heparin lock or heparinized catheter.
Instructions
If the patient's hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted.