1 – Program overview

This External Quality Assessment program evaluates the accuracy of the most common hemostasis and thrombosis assays.

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

Participants are free to assay all analytes or only those they are interested in.

2 – Assessment frequency

Number of surveys per year: 10
Number of control samples per survey: 2
Number of samples per year : 20

Several plasma profiles are tested, with different levels for the most common analytes. The most frequent analytes are tested in every survey, while the less common ones are tested at least 4 times during the year.

3 – List of analytes assessed 

• Prothrombin time (in seconds [Quick time], percent and INR)
• Activated partial thromboplastin time (expressed in seconds and ratio)
• Cephalin Kaolin time (expressed in seconds and ratio)
• Fibrinogen
• PT coagulation factors (II, V, VII, X and VII+X)
• aPTT coagulation factors (VIII, IX, XI and XII)
• Factor XIII
• Antithrombin (activity and antigen)
• Protein C (activity and antigen)
• Protein S (activity and antigen)
• Free protein S
• Thrombin Time
• Reptilase Time

4 – Description of the control samples

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

warning Sample volume: if necessary, order an additional kit.