Quality - LaboratoryQuality Control An Overview...

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Laboratory Quality  Control   An Overview
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Definitions (1) Quality Control - QC refers to the measures that must be included during each assay run to verify that the test is working properly. Quality Assurance - QA is defined as the overall program that ensures that the final results reported by the laboratory are correct. “The aim of quality control is simply to ensure that the results generated by the test are correct. However, quality assurance is concerned with much more: that the right test is carried out on the right specimen, and that the right result and right interpretation is delivered to the right person at the right time”
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Definitions (2) Quality Assessment - quality assessment (also known as proficiency testing) is a means to determine the quality of the results generated by the laboratory. Quality assessment is a challenge to the effectiveness of the QA and QC programs. Quality Assessment may be external or internal, examples of external programs include NEQAS, HKMTA, and Q- probes.
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Variables that affect the  quality of results The educational background and training of the laboratory personnel The condition of the specimens The controls used in the test runs Reagents Equipment The interpretation of the results The transcription of results The reporting of results
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Errors in measurement True value - this is an ideal concept which cannot be achieved. Accepted true value - the value approximating the true value, the difference between the two values is negligible. Error - the discrepancy between the result of a measurement and the true (or accepted true value).
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Sources of error Input data required - such as standards used, calibration values, and values of physical constants. Inherent characteristics of the quantity being measured
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Quality - LaboratoryQuality Control An Overview...

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