von Willebrand Multimers

Alternative Names/Synonyms	von Willebrand Factor Multimers, VWD Multimers, VWF Multimers
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Hematology
Specimen Type	Blood
Test Code	VWDMT

Ordering Instructions, Requisition

MSH Coagulation requisition form (MS 520)

Specimen Requirements (Sample Type)

Plasma (3.2% Na Citrate)

Specimen Requirements (Volume (mL))

Full draw

Specimen Requirements (Tube Type)

Light Blue citrate tube
Collection Containers – Tube Types

Collection Requirements

The 9:1 blood/citrate ratio must be kept constant. Adjustments for the amount of anticoagulant should be made when the hematocrit is abnormal (above 55%). Mix immediately to prevent clotting.
Collection Instructions

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Referred Out: https://kingstonhsc.ca/laboratory-services

Referral Laboratory

Referred Out to Kingston

Special Instructions

Call hematology Lab x4647 before blood collection