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Laboratory Test Reference Guide

Laboratory Information

Test Name

Von Willebrand Disease Screen


Haemophilia screen
Bleeding Screen

Constituent Tests

Specimen Collection

Pre Testing Requirements

For samples within Waikato Hospital, samples must be received in the laboratory within 2 hours of collection and kept at room temperature (NOT on ice or heat).

Specimen Collection and Transport Protocols


If despatched from outside Waikato Hospital, plasma must be double spun and frozen within 4 hours of collection.

Adult Specimen

3 x 2.7 mL Citrate tubes (light blue)

Sample Delivery to Lab

Must be received in the Laboratory within 2 hours of collection. Do not send specimen via Lamson pneumatic tube system. Please walk specimen to laboratory.

Instructions for Referral to Waikato Lab

Aliquot instructions

2 x1.5ml frozen double-spun citrated plasma

Aliquot Transport

PFA must be sent directly to Waikato Hospital. Sample is unsuitable for testing after 4 hours. 

Test Information



Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

Batched weekly however Factor VIII, von Willebrand activity and von Willebrand Factor antigen are available urgently as required

Diagnostic Use Or Instructions

A PFA will be performed with all initial VWD investigations performed when samples are collected at Waikato Hospital.

Minimum Volume

2 x 2.7 mL Citrate tubes (light blue)

Electronic Information

Registration Code


HL7 mapping code