BƯỚC ĐẦU ỨNG DỤNG PHƯƠNG PHÁP SIGMA TRONG CẢI TIẾN KIỂM SOÁT CHẤT LƯỢNG XÉT NGHIỆM HOÁ SINH TẠI BỆNH VIỆN NGUYỄN TRI PHƯƠNG

Abstract

Introduction: The sigma index is used as a self-assessment method, helping the laboratory select Westgard rules and make an appropriate quality control plan. Objective: to evaluate the effectiveness of applying sigma values in improving the error control of some quantitative biochemical assays. Materials and methods: A pre-evaluation intervention study, conducted from March to November 2023, determined sigma values before and after the application of interventions on eight quantitative biochemical tests (urea, glucose, creatinine, AST, ALT, GGT, cholesterol, triglycerides), using the DxC700AU analyzer (Beckman Coulter), at the Laboratory, Nguyen Tri Phuong Hospital. Results: Before the intervention, GGT and triglycerides had excellent sigma values, needed to simplify control rules. The remaining parameters belong to the group where control improvements should be applied. After the intervention, sigma values increased at all 8 parameters (considering both concentration levels), as low as 4.4 and as high as 12.2. The worst level of improvement was in Creatinine. Conclusion: The laboratory can widely apply the sigma index to evaluate the effectiveness of improving the quality control of many laboratory parameters.