Recently we have had a problem with apparent poor EQA performance
because we have sent in results as less than for a particular analyte.
We are using the manufacturer's stated reporting range for the assay, so
treat EQA same as patient samples and following CE regulations.
It appears other labs do send in results, even though they are below the
stated limits. Do these labs also report patient results at this level, or are they
being selective for the EQA providers.
Should EQA schemes mark you down for complying with the providers stated
assay range? Or, should they ask users to only report within the ranges.
I know this might be a problem when a different platform has a lower cut off
level, but then surely this is what CE marking of kits etc was all about.
Gary Mascall
Worcestershire Acute Hospitals NHS Trust.
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