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EQA 2023 - Anti-PF4 Antibodies screening (TIH)
Expert Biologists - Scheme Coordinators:
Chantal BON and Roland MELEY
EQA performed since 2022
Number of participating laboratories in 2022: 53

1 – Scheme overview

This External Quality Assessment scheme allows an evaluation of accuracy of the differents methods for Anti-PF4 Antibodies screening, in the diagnosis of heparin-induced thrombocytopenia.

The control products are suitable for immunological methods (rapid tests and ELISA) and the main marketed reagents are represented.

Several levels are tested: negative and positive at different antibody concentrations.

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

2 – Assessment frequency

Number of investigations per year: 4
Number of control samples per investigation: 2 or 3
Number of samples per year : 10

3 – List of analytes assessed 

  • Anti-PF4 Antibodies
  • The exploitation of the results is quantitative (expression in U/mL and OD), and also qualitative (negative, positive or questionable research).

4 – Description of the control samples

Liquid Human control plasma (citrate) (ready-to-use 0.5 mL samples), overloaded with anti-PF4 monoclonal antibody.

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