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The page below is a sample from the LabCE course Quality Control. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Using Westgard Rules

  • In 1981, Dr. James Westgard and his associates developed a multi-rule procedure for interpreting control data.
  • Since then, a number of sophisticated quality control schemes or analogues based on this multi-rule logic have evolved.
  • To show how the Westgard Rules may be applied in quality control, three of the most common rejection limits will be illustrated in the following pages.