2010, Number 4
How to guarantee the analytic quality
Westgard J, Mercapide L, Sáez A, Porras A, Martínez O, Amaya E, Iturriza M, Mendoza E, Brambila E, Terrés A
Full text
Language: Spanish
References: 15
Page: 179-189
PDF size: 329.56 Kb.
ABSTRACT
Background: On July, 2010 previous to the 5th International Cycle of Quality Conferences a number of experts from Latin America met in Cancun, Mexico including chemists, pathologists, and related professionals to discuss various topics on the current state of quality management and technical competence in clinical laboratory. The conclusions of this event was transmitted live to thirty-five alternate venues in Argentina, Brazil, Colombia, Chile, Ecuador, Panama, Peru, Dominican Republic, and Venezuela. The event was sponsored by Bio- Rad and counted with the recognition of IFCC and with the support of the Secretariat of Health of Mexico, in addition to multiple national professional societies from the participating countries. The main objective of the reunion was to review issues affecting Latin America on quality improvement of laboratories, notably: 1) Education and training professionals and technicians 2) Reinforcement in mandatory, regulations. 3) Improving economic resources. 4) Improvements in coordination between those involved. To perform this task the organizers distributed experts into five groups which covered the following topics: 1) How to achieve an appropriate and adequate quality in clinical laboratories. 2) Effective control of analytical stage 3) Education: pillar of quality on clinical laboratory. 4) Risks control on clinical laboratory: the critical staff role in patient care 5) Preparing clinical laboratory for crisis management. Lessons from AH1N1 flu epidemic. Objective: This document presents conclusions of Group 2, which dealt with the Effective Control of the Analytical Stage, emphasizing specific issues such as medical relevance, strategic planning of quality, internal quality control, external quality assessment, proficiency testing, traceability, uncertainty, and risk analysis. Method: During two journeys, experts reviewed international regulations and discussed specific issues, commenting on the situation from each of their seven countries of origin, including regulations and practices of each of them. The approach was eminently practical to give priority to the possibility of generating basic recommendations that may apply immediately to any clinical laboratory regardless of their medical care level, or geographic location regardless of whether these recommendations can evolve towards guidelines or standards in the future. The conclusions of each work group were presented on a plenary session with live transmission via Internet to the 34 sites of the above-mentioned countries. Original submissions are now available at https://bio-rad.on.intercall.com/ confmgr/public_stored_docs.jsp Recommendations: INTERNAL QUALITY CONTROL. Traceability is manufacturer’s responsibility, laboratory should request the documentation. Validation is a laboratory responsibility. Proper personnel should review and comply with manufacturer recommendations, but not only limit to them. The number, frequency and level controls depends on the number of tests and the magnitude of the analytical round; type test: manual or automated; the type of round (continuous flow or batch); the number of shifts per day and days of the week that performs test plus additional events such as batch change, calibrations, blackouts, etc. Each Head of the Laboratory must design and document a control plan. In general it may be recommended to locate a normal control and an abnormal at the beginning and end of the round (n = 4 controls) compare and assess the results. If you notice differences it is appropriate to add a couple at the mid point of the round. Evaluate the outcomes of patients by calculating the average and median of all the results that are within of reference limits. Note and also monitor the percentage of abnormal results. Perform a detailed statistical control of all data (controls and patients). EXTERNAL QUALITY ASSESSMENT. The Proficiency Test Provider must approve ILAC G13/08: 2007 / ISO 17043:2010 Standards. Uniformity and accuracy evaluation is the responsibility of the proficiency testing provider. The program must use unbiased high quality controls. The frequency must be at least monthly. The laboratory must retain an aliquot to make verifications. Report results must be within the first 72 hours so that appropriate measures can be applied. The most important for evaluating accuracy parameter is Bias % vs. Assigned Value. The laboratory must apply preventive and corrective measures utilizing independent «Third Opinion Controls» systematically. Discussion: The key point of evidence-based medicine is within the clinical laboratory, which generates the basis on which more than 70 % of medical decisions are taken. Medical relevance of clinical laboratory is the fundamental premise. Quality health care, from the point of view of efficiency, lies precisely in the clinical laboratory where the need for technical competence and quality management systems is clear; including traceable, well controlled and validated methods. The first step to achieve the quality is the elaboration of a strategic plan that shall include specific, measurable, achievable and challenging analytical objectives that actually are being developed worldwide on biological variation basis in order to achieve medical relevance.REFERENCES