Test Code LAB307 VON WILLEBRAND FACTOR ANTIGEN
Method
Immunoassay
CPT(s)
Description | CPT Code |
VWF Antigen | 85246 |
Reference Range
50 – 185%
Instrumentation
ACL Top
Specimen Information
Container | Specimen | Temperature | Collect Vol | Submit Vol | Min Vol | Stability |
Blue Top Tube | Plama | Frozen | To fill line | 2 mL plasma | 0.5 mL plasma | 6 months |
Blue Top Tube | Whole Blood | Ambient | To fill line | To fill line | To fill line | 4 hours |
Refer to Coagulation Specimen Handling prior before collection. Submit 2 × 0.5 mL frozen plasma aliquots for this test. Draw blood in light blue top tube(s). If sample can be submitted within 3 hours, submit whole blood at ambient temperature. If this is not possible, spin down tube and remove plasma. Spin plasma again and place citrate platelet-poor plasma in required number of plastic vials (Glass vials cannot be accepted.) Freeze specimen at less than or equal to minus 40° C if possible. Send specimen frozen on dry ice. Each coagulation assay requested should have its own vial.
LOINC Code Information
Result Code | Reporting Name | LOINC Code |
VWFA | VWF Antigen | 27816-8 |
Performing Location
University of Vermont Medical Center
Test Schedule / Analytical Time / Test Priority
Tuesday, Thursday / 1 day / Available STAT, nights and weekends with pathologist approval
Section
Coagulation
Is the UVMMC lab NY State Certified to perform this testing? Yes/No
Yes