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VWF Antigen

eDH Procedure Code(s)

LAB757 Von Willebrand Factor Antigen
LAB4312 Von Willebrand Disease Lab Profile
LAB3932 Bleeding Diathesis Screen

Test Information

Reference range depends on ABO blood type. Results are reported with comment giving expected range for patient’s ABO type.

Order Questions

LAB3932 Bleeding Diathesis Screen
  • Relevant Patient History:
  • Relevant Family History:
  • Aspirin, NSAIDS, or Antiplatelet drugs?
  • Warfarin, Heparin, Other anticoagulant?
  • Is Platelet Function testing required?

Collection Information

1.8 mL Sodium Citrate tube filled to the line
OR
2.7 mL Sodium Citrate tube filled to the line
Blue top tubes must be filled within 10% of the stated volume. A discard tube must be used if a citrate tube is to be drawn using a winged blood collection set. It is important to remove air from the blood collection set to ensure the proper blood volume is obtained in the coag tube.
If the patient has a known hematocrit >55%, please contact the coagulation lab for an adjusted collection tube before drawing the blood.

Specimen Information

Specimen Type Specimen Source Acceptable Containers Minimum Test Volume (mL)
Blood Blood, Venous BluCit-F 1.0
Blood Blood, Venous OrgCit-F 0.5
Blood Blood, Venous Adjusted-F 1.0

Shipping and Handling

Processing Instructions: Double spin, separate, and freeze.

Transport Temperature: Frozen
Transport Instructions: N/A

Specimen Stability Unprocessed
Unprocessed: 4 hours

Specimen Stability Post Processing
Ambient: 4 hours
Refrigerate: N/A
Frozen: 2 weeks

Test Components

Component LOINC Code
VON WILLEBRAND FACTOR ANTIGEN 6012-9

Turnaround Time (TAT)

STAT 1 Hour
Routine 1 Day

CPT Code(s)

85246

Performing Lab Section

Coagulation

Performing Lab(s)

Dartmouth Hitchcock Medical Center Laboratory (MHMH)