1 – Program overview

This external quality assessment program evaluates the accuracy of D-Dimer and Von Willebrand Factor assays. The main commercial assay techniques are represented..

Statistical reports are sent with supporting comments from the expert clinical biologists who coordinate the program.

Participants can test all analytes, or only those they are interested in..

2 – Assessment frequency

Number of surveys per year: 6
Number of control samples per survey: 2
Number of samples per year : 12

D-dimers are assessed on all 12 samples, and von Willebrand factor on 8 samples.

3 – List of analytes assessed 

• D-Dimers: quantitative exploitation and qualitative interpretation in relation to the decision threshold
• Von Willebrand Factor – Antigen
• Von Willebrand Factor – Activity

4 – Description of the control samples

Lyophilized human control plasma (citrate) (samples to be resuspended in 1 mL of distilled water).