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Órgano oficial de difusión de la Federación Mexicana de Patología Clínica, AC y de la Asociación Latinoamericana de Patología Clínica/Medicina de Laboratorio

2015, Number 3

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Rev Mex Patol Clin Med Lab 2015; 62 (3)

Metric sigma implementation as an essential part of internal quality control in the hematology department

Cumplido-Uribe C, Hernández-Hernández J, Andujo-González S, Guzmán-Ramírez H

Language: Spanish
References: 12
Page: 140-145
PDF size: 523.95 Kb.


ABSTRACT

Introduction: Internal quality control (IQC) is necessary because a variety of mistakes can appear at different points of the analytical phase. The analytical quality is not easy to evaluate with conventional methodologies of IQC. The metric sigma implementation could help to control some processes. Objectives: To implement the use of metric sigma as a statistical tool for internal quality control in the hematology department. Material and methods: We evaluated the hematology department’s IQC with metric sigma for 18 months, for which we used the Beckman Coulter LH750 analyzer. The studied data was taken from the analyzed control specimens, every day in three shifts. Results: The IQC sigma results were constant up to 6 (world class). The highest sigma value during this period was platelets, getting 10.74 weighted sigma. The lowest metric sigma value was hematocrit, with 4.21 weighted sigma; 1.85 was its lowest monthly result during the evaluated period. Conclusions: Metric sigma helps to control process and track failures, as well as to get an almost excellent performance in external quality program evaluations.


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