Laboratory Quality Control

Using International QA schemes to supplement existing EQA schemes

Mind the Gap! Using International Quality Assessment Schemes to Supplement Existing EQA SchemesQ&A with Global Business Manager of Randox Quality Control, Steven Jordan, who discusses using international quality assessment schemes to supplement existing EQA schemes

Q: Our laboratory’s existing EQA scheme is not as frequent as we need for some programmes. Should we change EQA scheme or what are our options?

A: Changing EQA providers can be a tricky proposition for some laboratories. Perhaps you are tied into a contract with your current provider, or if you are part of a group of laboratories you have to consider the wider needs of your colleagues as well. Sometimes people are reluctant to change because they’ve always used a particular EQA scheme and don’t want the stress of learning a new system.

Whatever the reason, if you are not in a position to completely change your EQA provider, you could still benefit from supplementing your existing EQA with individual programmes from an international quality assessment scheme. International schemes often offer more frequent programmes than national schemes, with all the usual programmes you’d expect but also some less routine ones. Multi-analyte programmes may also be available which allow laboratories to significantly reduce the number of programmes needed to cover their assay range and meet their EQA needs, thereby increasing productivity and efficiency.

Q: What should a laboratory look for when considering an alternative or complementary EQA scheme?

A: Firstly, make sure the scheme is inspected and accredited to international standards of best practice. It should be accredited to ISO/IEC 17043:2010, which outlines the general requirements for proficiency testing. Accreditation to this level gives scheme participants added confidence that the scheme is fit for purpose.

The frequency of programme reporting is also important, the more frequent the better. Some international schemes offer both bi-weekly and monthly reporting enabling identification of errors sooner. It also means laboratories will cover the clinical range sooner. Some schemes can turn around reports within 24-72 hours meaning corrective action can also be implemented with minimal effect on lab operations.

In summary, a good EQA scheme should have:

  • A sufficient number of scheme participants.
  • Flexible programme choices, ideally with the flexibility to customise the programme to suit the laboratory’s unique requirements.
  • Effective consolidation of programmes (see comment on multi-analyte programmes above)
  • Quality material – you should be provided with ‘blind’ samples that can be analysed as if they were patient samples, effectively monitoring bias. Analytes should come in a realistic range of concentrations, allowing assessment of normal and abnormal ranges, and analytical and clinical ranges should be covered.
  • Regular reports – bi-weekly preferably or at least once a month, with a rapid turnaround of resulting reports.
  • An independent advisory panel, to ensure the scheme is conducted in a professional and ethical way.

Q: Is bigger really better?

A: When it comes to EQA this is definitely true. The more laboratory participants the scheme has, the wider the range of methods and instruments covered, increasing statistical validity as a result. International schemes will generally offer bigger peer groups which increases the representation of manufacturer’s instruments and diagnostic kits.

For more information the Randox range of RIQAS EQA schemes, visit

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