Evaluating the accuracy and precision of glucose measurement results in some government medical laboratories in eastern Libya

Abstract

In a clinical laboratory, quality control is essential for verifying test results are reliable and have appropriate levels of precision and accuracy. It is well recognized that laboratory analysis influences over 70% of medical decisions made regarding patient care. An internal quality control procedure verifies that the test produces consistently reliable results on a daily basis.

Objective of this study to evaluate how implementing internal quality control affected test result accuracy and precision in the clinical labs in east Libya.

Material and methods: The control serum is lyophilized serum containing component concentrations suitable for clinical laboratory quality control and known concentrations for each laboratory analysis. Test, like a glucose test, to evaluate the pipettes, reagents, or lab equipment. The test findings are then compared using the known concentration of control sera in accordance with the internal quality control system. Levey and Jennings Chart and Westgard Rules.

Stabilized control sera with established concentrations (both normal and pathological) were employed in the laboratories of ten government hospitals in east Libya, which received every day one aliquot container sample of control sera normal and one aliquot container of pathological for fifteen days. The total number of samples was 300 (150 normal and 150 pathological) for the investigation in order to assess precision and accuracy.  Additionally, questionnaires were used to evaluate internal quality control procedures.