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October 2007
Looking beyond the terminology of Trueness and Uncertainty, Dr. Westgard examines the intended uses and customers of these terms. If we spend our time fighting about Metrological definitions, are we serving the patient?
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October 2007
Trueness. Uncertainty. Accuracy. Precision. Why are there so many definitions for the same terms? Dr. Westgard traces the history of metric concepts in the clinical laboratory. See when and where ISO, IFCC, and CLSI began introducing new terminology into the lab.
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September 2007
Total Error. Trueness. Uncertainty. Can these terms coexist? Under ISO, will defining an allowable error for a test become unacceptable? Will the embrace of ISO accreditation mandate the rejection of all non-ISO-conforming terminology and concepts?
The debate - and the future - is uncertain.
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February 2007
We need some truthful guidance about Trueness, Uncertainty and Quality. This year's regulations feature new terminology that adheres to ISO conventions. As we leave behind our familiar concepts of precision, bias, and total error, are we gaining anything? Are we just changing names, or are we changing our goals, too?
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Written by James O. Westgard, PhD, FACB
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In the face of failed CLIA regulations, where do we now turn? We may need to look to standards and practices outside the US. With this in mind, Dr. Westgard introduces a new series of articles about ISO and quality management. Guest authors Dr. Rogerio Rabelo and Dr. Daniel Perigo come to us from Fleury Diagnostics in Brazil, where they have experienced the ISO certification process.
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