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Frequent issues and lessons learned from EuroFlow QA.

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The EuroFlow Quality Assessment (QA) program improves laboratory data quality for non-member participants. Adherence to EuroFlow protocols enhances standardization, making data comparable and suitable for patient evaluation.

Keywords:
EuroFlowFlow cytometryQuality assessment schemeStandardization

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Area of Science:

  • Clinical laboratory science
  • Immunophenotyping
  • Flow cytometry standardization

Background:

  • The EuroFlow Quality Assessment (QA) program was established to evaluate and improve the standardization of EuroFlow protocols for sample preparation and instrument setup.
  • Initially beta-tested internally, the program opened to external participants in 2015, aiming to ensure data quality and comparability with EuroFlow consortium members.

Purpose of the Study:

  • To assess if external laboratories achieve data quality comparable to EuroFlow members.
  • To determine if non-member data is sufficiently standardized for automated analysis, including population gating and alarm notification.
  • To evaluate the impact of the EuroFlow QA program on improving standardized data quality.

Main Methods:

  • Analysis of 163 results from 2015-2016 EuroFlow QA rounds involving 87 laboratories worldwide.
  • Comparison of scores between first-time participants and those with prior participation, as well as with EuroFlow member scores.
  • Identification of common errors, including protocol non-adherence, improper gating, and compensation issues.

Main Results:

  • A significant improvement was observed in participants' scores after their first participation (median 91% correct) compared to subsequent participations (median 94% correct, p=0.017).
  • Participant scores approached the quality of EuroFlow member scores (median 97% correct).
  • Frequent errors included non-adherence to protocols, improper reagent use, incorrect gating strategies, and compensation-related problems.

Conclusions:

  • The EuroFlow QA program positively impacts the improvement of standardized data quality for non-member laboratories.
  • Adherence to EuroFlow standard operating procedures and reagent panels is crucial for achieving high-quality, standardized data.
  • The program facilitates the use of the EuroFlow reference sample database by external laboratories for patient evaluation.