Von Willebrand Factor Antigen




Test Mnemonic

VWF

CPT Codes

  • 85246 - QTY (1)

LOINC ®

27816-8

Aliases

  • Coagulation Factor VIII Related Antigen
  • Factor VIII:R Ag

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
Volume2 mLTypePlasmaContainerSodium citrate (Lt. Blue)Collect Temperature Transport TemperatureFrozenSpecial Instructions 

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
Volume1 mLType Container Collect Temperature Transport Temperature Special Instructions 

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name Description
NameLatex Immunoassay (LIA)Description 

Reference Range

Von Willebrand Factor Antigen
Sex Age From Age To Type Range Range Unit
Von Willebrand Factor Antigen Sex  DaysAge From1 DaysAge ToNormalType37 - 314Range%
Von Willebrand Factor Antigen Sex2 DaysAge From5 DaysAge ToNormalType50 - 278Range%
Von Willebrand Factor Antigen Sex6 DaysAge From30 DaysAge ToNormalType19 - 269Range%
Von Willebrand Factor Antigen Sex1 MonthsAge From3 MonthsAge ToNormalType58 - 226Range%
Von Willebrand Factor Antigen Sex4 MonthsAge From11 MonthsAge ToNormalType33 - 216Range%
Von Willebrand Factor Antigen Sex1 YearsAge From5 YearsAge ToNormalType60 - 131Range%
Von Willebrand Factor Antigen Sex6 YearsAge From10 YearsAge ToNormalType44 - 158Range%
Von Willebrand Factor Antigen Sex11 YearsAge From16 YearsAge ToNormalType46 - 168Range%
Von Willebrand Factor Antigen Sex17 YearsAge From99 YearsAge ToNormalType50 - 173Range%

Special Info

3.2% sodium citrate is the preferred anticoagulant recommended by CLIS. Order VWF panel for further evaluation and classification.

Clinical Info

Differentiates between Hemophilia A and von Willebrand's disease. Other tests may be necessary (Ristocetin cofactor, ristocetin aggregation, VWF multimers) to diagnose von Willebrand's disease.