The permissible limits for intermediate precision in control charts
Authors:
J. Ambrožová
Authors‘ workplace:
Oddělení klinické biochemie Nemocnice Prachatice, a. s.
Published in:
Klin. Biochem. Metab., 23 (44), 2015, No. 3, p. 109-115
Overview
Objective:
Presentation an advanced method for deriving correct permissible precision limits which are required for the correct use of control charts, and for the effective internal quality control management (IQC) in a laboratory practice.
Method:
The 3-signal table application designed by Haeckel and Wosniok [1], which provides appropriate means to calculate the correct permissible precision limits (pCVA) from the empirical biological variability (CVE), based on reference intervals (RIs); the subsequent proper use of pCVA in the control charts.
Discussion:
Potential uses of the 3-signal table [1].
Conclusion:
Warning against an improper use of the control charts; the correct method for deriving the permissible intermediate precision limits as the key ingredient for setting up effective control charts, which are a prerequisite for an objective classification of different laboratory methods according to their real quality.
Keywords:
permissible precision limits, quality classes, reference limits, control charts.
Sources
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Labels
Clinical biochemistry Nuclear medicine Nutritive therapistArticle was published in
Clinical Biochemistry and Metabolism
2015 Issue 3
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