1 – Program overview

This external quality assessment program evaluates the accuracy of D-dimer and von Willebrand factor assays. The main commercial assay methods 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: 4
Number of control samples per survey: 2
Number of samples per year: 8

3 – List of analytes assessed 

• D-dimer
• Von Willebrand factor antigen
• Von Willebrand factor activity

4 – Description of the control samples

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