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Test & Collection Guide

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von Willebrand Screen

Alternate names:
vWD Assay, vWD Screen, vWF
Laboratory:
Unassigned
Specimen types:
Plasma
Blood
Container types:
Sodium CitrateSodium Citrate
Collection Instructions:
Transport specimen at Room Temperature to lab

Specimens for vWD screening kept at room temperature, should be centrifuged and tested within 4 hours of time of collection.

If testing is not complete within 4 hours, plasma should be removed from the cells (6 X 1 mL Eppendorf tubes) and frozen at -20 C for up to 2 weeks or -70 C for up to 6 months.

A frost-free freezer should not be used.

Notes:

To comply with HIC ruling tests must be requested individually.

2 x Sodium citrate tubes

Includes INR, APTT, von Willebrand Factor, Factor VIII and vW Antigen.

Frequency:
Weekly
Result Turnaround Time:
4 weeks