VON WILLEBRAND FACTOR ANTIGEN
General Information
HLAB/HOL Code: VWAG
UPHSM LIS Test #: 1194
Schedule: Monday, Wednesday, Friday
Testing Time: 1 Day
Testing Lab: UP Health System-Marquette
UPHSM LIS Test #: 1194
Schedule: Monday, Wednesday, Friday
Testing Time: 1 Day
Testing Lab: UP Health System-Marquette
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 2.0 mL Plasma
Temperature: Frozen
Tube Type: 1 Blue Top (Citrate)
Collection Info:
Centrifuge light blue citrate tube. Remove plasma and spin again. Place plasma in a plastic vial and freeze immediately. Double centrifuging
specimens is critical for accurate results as platelet contamination may cause spurious results.
Temperature: Frozen
Tube Type: 1 Blue Top (Citrate)
Collection Info:
Centrifuge light blue citrate tube. Remove plasma and spin again. Place plasma in a plastic vial and freeze immediately. Double centrifuging
specimens is critical for accurate results as platelet contamination may cause spurious results.
Methods
Immuno-turbidometric Assay
Clinical Utilities
The quantitative determination of Von Willebrand Factor Antigen.
CPT Codes
85246
* The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding
is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
Reference Range
60-140% for patients with Group O blood type
75-180% for patients with blood types other than O
Note: The VW antigen level increases during pregnancy, use of birth control pills, physical exercise, stress and also with age. Neonates, infants, and children have normal or mildly increased plasma VW antigen, with respect to the adult normal reference ranges.
75-180% for patients with blood types other than O
Note: The VW antigen level increases during pregnancy, use of birth control pills, physical exercise, stress and also with age. Neonates, infants, and children have normal or mildly increased plasma VW antigen, with respect to the adult normal reference ranges.
