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Modified Levey-Jennings charts for calculated laboratory tests
1Abant Izzet Baysal University, Duzce School of Medicine, Department of Clinical Biochemistry, Duzce, Turkey. coskun_a2002@yahoo.com
Clinical Chemistry and Laboratory Medicine
|April 8, 2006
Summary
Quality control for calculated laboratory tests is essential. This study modified Levey-Jennings charts for calculated tests, enhancing the reliability of results in clinical laboratories.
Area of Science:
- Clinical Chemistry
- Laboratory Quality Management
Background:
- Clinical laboratories calculate many test results, such as low-density lipoproteins, from measured tests.
- Current quality control programs do not cover calculated tests, creating a gap in total quality management.
Purpose of the Study:
- To adapt the Levey-Jennings chart for quality control of calculated laboratory tests.
- To enhance the reliability of calculated test results within a total quality system.
Main Methods:
- Developed a method using Taylor series expansion and alternative equations to determine the standard deviation for calculated tests.
- Prepared Levey-Jennings charts specifically for calculated tests, including low-density lipoproteins.
Main Results:
- Successfully created Levey-Jennings charts for calculated tests, demonstrating ease of preparation.
- Implementation of these charts significantly improved the reliability of reported calculated test results.
Conclusions:
- Relying solely on quality control for measured tests is insufficient for comprehensive patient result accuracy.
- Integrating Levey-Jennings charts for calculated tests into total quality management systems is crucial for improving overall laboratory test reliability.