A13914AF
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CHAPTER 5
Quality Control
Quality Control
Introduction
This task is performed when your laboratory protocol indicates that control material should be
analyzed. A daily analysis of at least two levels of control materials is highly recommended. In
addition, these controls should be run with each new calibration, with each new lot of reagents, and
after specific maintenance or troubleshooting activities. However, users should determine their
own frequency based on the NCCLS Proposed Guideline C24-P INTERNAL QUALITY CONTROL
TESTING: PRINCIPLES AND DEFINITIONS.
Quality Control Program
The system Quality Control program provides the capability of monitoring system and chemistry
performance by performing real-time analysis of control data.
The QC data is presented in both a summary format and in a chart format. Westgard QC rules are
applied to the data to aid in determining chemistry and system reliability.
Determination of QC Flags
The DxC uses the Z-score method for standardizing the scale of a normally distributed
measurement variable. For an individual control result, the Z-score represents the distance in
standard deviations from the assigned mean. The Z-score is calculated from the following equation
where:
Summary of Contents for UniCel DxC 600
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