Name: von Willebrand Disease Type 2B Evaluation
Test Name: von Willebrand Disease Type 2B Evaluation
Health Link Test Code: HCVW2B
LIS Test Code: VW2B
VWD Type 2B Binding von Willebrand Factor Multimers
Testing Site: Testing will be sent to an approved reference laboratory
In-Lab Turnaround Time: 1 - 2 weeks.
Collection Container: Light blue top (3.2% NaCitrate)
Do NOT draw through a line containing heparin. The venipuncture MUST be atraumatic to avoid hemolysis and contamination with tissue factor and platelets. Tube must be allowed to fill completely.
Collection Volume: 3.5 mL
Sample Analyzed: Plasma
Testing Volume: 1.5 mL
Pediatric Testing Volume: 1 mL
Centrifuge specimen to yield platelet poor plasma (platelet count should be less than 10 K/uL). Separate plasma and transfer to plastic tube or vial as follows. Two aliquots must be submitted. For adults, one 0.5 mL and one 1.0 mL aliquot. For pediatrics, one 0.2 mL and one 0.7 mL aliquot.
Freeze plasma within 4 hours of collection at -20°C or below.
Transport whole blood specimen at room temperature to laboratory within 4 hours of collection. See Specimen Processing for instructions if transport criteria are not met. Transport frozen plasma aliquots on dry ice to UWHC Hospital Laboratory.