Articles Vol. 67 No. 2 02/03/2026

APPLICATION OF THE SIX-SIGMA METHOD IN QUALITY CONTROL OF PERIPHERAL BLOOD CELL ANALYSIS ON THE DXH 690T MACHINE AT THE LABORATORY DEPARTMENT – VINMEC SMART CITY INTERNATIONAL GENERAL HOSPITAL

Nguyen Thi Kim Hue1,2, Nguyen Thi Hoai Phuong1,2, Nguyen Thi Hong Anh1,2, Hoang Huong Huyen1,2, Nguyen Tu Trung1,2, Nguyen Thi Huy1,2, Tran Thanh Lam3,4
1 Laboratory Department, Vinmec Smart City International General Hospital
2 Khoa Xét nghiệm, Bệnh viện Đa khoa Quốc tế Vinmec Smart City
3 Laboratory Department, Vinmec Times City International General Hospital
4 Khoa Xét nghiệm, Bệnh viện Đa khoa Quốc tế Vinmec Times City
DOI: 10.52163/yhc.v67i2.4347
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Keywords
Six Sigma, DxH 690T, Hematology, Quality management
Abstract

Objectives: Assess the analytical performance of several peripheral blood cell indices on the DxH 690T system using the Six Sigma method.

Method: Cross-sectional descriptive study of White Blood Cell count (WBC), Red Blood Cell count (RBC), Hemoglobin (HGB), and Platelet count (PLT) indices from October 2024 to March 2025 at the Department of Laboratory Medicine of Vinmec Smart City International Hospital.

Results: Based on Sigma values, the quality of the indices is classified as follows: 9 indices have excellent quality, accounting for 75%. There is 1 index with good quality, accounting for 8.3%, and 2 indices with acceptable quality, both accounting for 16.7%.

Conclusion: The Six Sigma method is a valuable tool in laboratory quality management, enabling laboratories to assess analytical performance and improve testing quality.

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