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Commutability and traceability in EQA programs.

Tony Badrick1, Wilson Punyalack1, Peter Graham1

  • 1RCPAQAP, St Leonards, Sydney, NSW, Australia.

Clinical Biochemistry
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Summary
This summary is machine-generated.

External Quality Assurance (EQA) is crucial for traceability and comparable patient results. This review clarifies EQA's role in achieving traceable and commutable results, emphasizing its value alongside conventional samples.

Keywords:
Analytical biasExternal Quality AssurancePatient sample commutabilityReference materialTraceability

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Area of Science:

  • Clinical Chemistry
  • Laboratory Medicine
  • Quality Assurance

Background:

  • Commutability of samples is vital for laboratory traceability.
  • The role of External Quality Assurance (EQA) in achieving traceability has been underestimated.
  • Traceability ensures comparable patient results across different laboratories.

Purpose of the Study:

  • To review the role of EQA in achieving traceable and commutable results.
  • To highlight the importance of EQA in facilitating comparable patient results.
  • To discuss the interplay between commutability, traceability, EQA, and Internal Quality Control (IQC).

Main Methods:

  • Discussion of commutability and traceability within EQA and IQC frameworks.
  • Presentation of examples of commutable EQA samples.
  • Analysis of conventional traceability chains and EQA's role in a "bottom up" model.

Main Results:

  • The pursuit of commutable samples has inadvertently diminished EQA's perceived value.
  • Some EQA materials demonstrate commutability for specific measurands.
  • EQA is essential for performance improvement in laboratories.

Conclusions:

  • Laboratories must understand the importance of using a diverse range of values in EQA to identify quality needs.
  • Traceability and EQA are compatible and not mutually exclusive.
  • EQA remains a key component in ensuring reliable and comparable laboratory testing.