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[Intralaboratory quality control over random and systematic errors using the combined Shewart-cusum check card]
Vutreshni Bolesti
|January 1, 1988
Summary
This study presents a quality assurance method for detecting errors in laboratory analysis. The combined Shewhart-CUSUM control chart effectively identifies both random and systematic errors, improving analytical quality assessment.
Area of Science:
- Clinical Chemistry
- Laboratory Medicine
- Analytical Chemistry
Context:
- Quality assurance is crucial for reliable laboratory results.
- Distinguishing between random and systematic errors is essential for effective error correction.
- Automated analyzers require robust quality control methods.
Purpose:
- To present a method for within-laboratory quality assurance.
- To evaluate the effectiveness of a combined Shewhart-CUSUM control card for detecting analytical errors.
- To assess the analytical quality of results from the RA 1000 Technicon analyzer.
Summary:
- A quality assurance method using a combined Shewhart-CUSUM control card is described for identifying casual (random) and systematic mistakes in laboratory analytical processes.
- This method was applied to evaluate the analytical quality of results generated by the RA 1000 Technicon automatic analyzer.
- The combined card is superior to the classical check card, which only detects random errors.
Impact:
- The combined method provides valuable information for laboratory specialists to ensure reliable laboratory data.
- While systematic errors detected may often be of minor medical importance, they offer crucial insights for process improvement.
- Enhances the overall reliability and accuracy of diagnostic testing in clinical laboratories.