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The Periodic Table and Organismal Elements01:27

The Periodic Table and Organismal Elements

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Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
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Published on: July 1, 2016

Inappropriate trace element testing in the Auckland region.

David Song1, Barry Palmer, Stephen du Toit

  • 1Department of Chemical Pathology, Labplus, Auckland City Hospital, Auckland, New Zealand.

The New Zealand Medical Journal
|March 2, 2011
PubMed
Summary

Trace element test usage in Auckland surged, driven by non-evidence-based requests from a few general practitioners. This study highlights significant wastage of public laboratory resources and suggests cost savings through defined test indications.

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Area of Science:

  • Clinical Chemistry
  • Laboratory Medicine
  • Public Health

Background:

  • Trace element testing is a common laboratory procedure.
  • Understanding trends in test utilization is crucial for resource management.

Purpose of the Study:

  • To analyze recent changes in trace element test usage in Auckland, New Zealand.
  • To identify factors influencing increased demand for these tests.

Main Methods:

  • Analysis of laboratory records for trace element tests from 2004 to 2008.
  • A questionnaire survey of frequent test requestors to determine reasons for ordering.

Main Results:

  • A 3.5-fold increase in annual trace element test requests observed.
  • Significant increases noted in serum copper, zinc, and selenium tests.
  • A small group of general practitioners accounted for a majority of the increased test orders, with non-evidence-based justifications.

Conclusions:

  • The majority of trace element tests in Auckland appear to be non-evidence-based.
  • This represents a substantial waste of public laboratory resources.
  • Defining appropriate indications for trace element tests can lead to significant cost savings.