Quality planning of Complete blood count (CBC) by using Six sigma and OPSpecs Chart in Hematology Laboratory Phrae Hospital
Abstract
Black ground: Quality control planning with the Six-Sigma system and the OPS pecs Chart has been used to increase laboratory efficiency for a long time. Especially, in the clinical chemistry laboratories. As for the Hematology and Microscopy laboratories, more quality control plans have been established. Hematology and Microscopy laboratory in Phrae Hospital has applied for membership of quality control by the EQA program of RIQAS. Which has a evaluation (2019) and a Six-Sigma quality control plan started in 2020.
Objective: To improve the quality control of the Complete Blood Count (CBC).
Study design: Six CBC blood integrity data were used, including WBC, RBC, HGB, HCT, MCV,
and PLT which were analyzed by Mindray CAL8000 and BC-6800 automatic blood cell counters in June. By using 3 levels of quality control substances . The EQA (RIQAS) quality assessment results and the %TEa from the CLIA to calculate the six-sigma of each item. To Plot normalize Inaccuracy and normalize Imprecision by using Microsoft Excel to help evaluate laboratory methods on OPSpecs Chart.
Results: It has been found that the automatic blood count device Mindray CAL8000 is effective in three world class criteria, RBC (8.40), HGB (11.29) and MCV (6.89). One excellent level is HCT (5.88). Two Good levels are WBC (4.99) and PLT (5.25). The Mindray BC-6800 has three world class performance levels - WBC (6.22), HGB (9.88) and MCV (8.29). Two good levels are RBC (4.81), and PLT (4.03). One Marginal level is HCT (3.72).
Conclusion: The automatic blood count device CAL8000 has a Sigma value from Good to World class. Can plan quality control using Sigma Westgard Rule 1 3s to monitor machine faults analysis results. As for the BC-6800, which is less efficient than the CAL8000, it requires more stringent quality planning. Use three additional Westgard Sigma Rules: 1 2s, 2 of 3 2s and R 4s in PLT, MCV and HCT.
Key words: Quality control planning, %TEa, Six-Sigma, OPSpecs Chart, CBC. World class, Marginal
