Name: Von Willebrand Factor Multimers
Test Name: Von Willebrand Factor Multimers
Health Link Test Code: HCVWFMUL
LIS Test Code: VWFMUL
Methodology: Gel Electrophoresis
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 factors and platelets. Tube must be allowed to fill completely.
Collection Volume: Full 3.5 mL tube
Pediatric Collection Volume: Pediatric tube filled to fill mark
4 hours on spun tube
Sample Analyzed: Plasma
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.4 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. 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 aliquot on dry ice to UWHC Hospital Laboratory.
Report provides interpretation.