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Westgard multirule for calculated laboratory tests.

Abdurrahman Coskun1

  • 1Duzce University, School of Medicine, Department of Clinical Biochemistry, Duzce, Turkey. coskun_a2002@yahoo.com

Clinical Chemistry and Laboratory Medicine
|October 13, 2006
PubMed
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Quality control for calculated lab tests like LDL-cholesterol is often inadequate. Applying the Westgard multirule to these calculated results enhances their reliability in routine laboratory procedures.

Area of Science:

  • Clinical Chemistry
  • Laboratory Quality Management

Background:

  • Many clinical laboratory tests, such as low-density lipoprotein (LDL)-cholesterol, are calculated from measured results.
  • Current quality control programs primarily focus on measured tests, lacking adequate assessment for calculated tests.

Purpose of the Study:

  • To adapt and apply the Westgard multirule, a standard quality control procedure, to calculated laboratory tests.
  • To improve the quality assurance of calculated test results in routine clinical laboratory settings.

Main Methods:

  • Developed Levey-Jennings charts specifically for calculated tests and their measured components (Equation charts).
  • Implemented the Westgard multirule statistical process control method on these calculated tests.

Main Results:

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  • The application of the Westgard multirule to calculated LDL-cholesterol and other calculated tests was straightforward.
  • This quality control approach significantly increased the reliability of the reported calculated test results.

Conclusions:

  • Relying solely on quality control for measured tests may lead to inadequate patient result reliability.
  • Integrating the Westgard multirule into quality management for calculated tests is essential for enhancing overall laboratory test result accuracy.