Search for Tests

Search by test name, number or alias

Back to search results

VON WILLEBRAND FACTOR, ANTIGEN

Test Number:
  • 6064
Test Alias:
Preferred Specimen:
  • Plasma
Container Type:
  • 3.2% sodium citrate (light blue-top) tube
Alternative Specimen:
Volume:
  • 1 mL
Collection Instructions:
  • Centrifuge light blue-top tube for 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and ship on dry ice. Place in specimen bag with "Frozen Specimen" label applied and transport frozen.

    Note:separate specimens must be submitted when multiple tests are ordered.

Transport Temperature:
  • Critical frozen
Specimen Stability:
  • Ambient: 8 hours
  • Refrigerated: 24 hours
  • Frozen: 1 month
Methodology:
  • Immunoturbidimetric Assay
CPT Code:
  • 85246
Reject Criteria:
  • Hemolysis • Received room temperature • Received refrigerated
Reference Range:
  • 50-217 %
Report Available:
  • 7 days

Back to search results