Traceability is an important tool in the harmonization and standardization of reporting laboratory results, making them comparable across measurement systems. Driven by International Standardization Organization (ISO) 15189 accreditation requirements, medical laboratories have entered the era of metrological traceability. Although calibrators are a key component in the entire metrological traceability system, there is controversy over internal quality control (IQC) materials. It has been proposed that trueness materials supplied by the system's manufacturer with metrological traceability can be used to confirm that the performance of the measuring system is properly unbiased. This article focuses on the implementation challenges and operational hurdles of applying traceability concepts to IQC materials for trueness verification in medical laboratories regarding the most recent 2022 edition of ISO 15189 standard requirements for IQC and metrological traceability. There are practical considerations concerning the acquiring of IQC materials. We must acknowledge the limitations and restrictions that manufacturers and laboratories face before the recommendations can be applied in routine practices.
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http://dx.doi.org/10.5937/jomb0-45468 | DOI Listing |
Clin Chim Acta
December 2024
Laboratoire national de métrologie et d'essais, Paris, France.
J AOAC Int
December 2024
Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou, 510316 China.
Background: White granulated sugar, a significant commodity in bulk trade and widely used raw material, plays a crucial role in the food, energy, and medicine industries. A certified reference material (CRM) of white granulated sugar provides a valuable tool for monitoring and maintaining the safety and quality of white granulated sugar and other related products. The colorimetric value, conductivity ash, sucrose content, and reducing sugar content serve as essential factors that determine the quality of white granulated sugar.
View Article and Find Full Text PDFAnal Bioanal Chem
December 2024
Bio-Metrology Group, Korea Research Institute of Standards and Science, Daejeon, Republic of Korea.
The mole, the SI unit for measuring the amount of a substance, was redefined as a fixed number of entities. This definition enables straightforward quantification of substances by counting individual entities. Counting proves particularly effective for quantifying large and discrete biological entities such as DNA, proteins, viruses, and cells, which are challenging to quantify via traditional physical or chemical methods.
View Article and Find Full Text PDFAnal Bioanal Chem
November 2024
Divisão de Metrologia Química, Laboratório de Análise Orgânica, Instituto Nacional de Metrologia, Qualidade E Tecnologia (Inmetro), 50 N. Sra. das Graças Av., Duque de Caxias, RJ, 25250-020, Brazil.
The Brazilian National Metrology Institute produced a suite of certified reference materials (CRMs) intended as internal standards (ISs) for quantitative nuclear magnetic resonance (qNMR). Being a ratio primary method, the use of qNMR in organic chemistry has already crossed the borders of research laboratories, despite the cost of instrumentation. The International Bureau of Weights and Measures (BIPM) proposed eight potential qNMR ISs.
View Article and Find Full Text PDFClin Chem Lab Med
November 2024
Department of Laboratory Medicine, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland.
Although the concept of bias appears consolidated in laboratory science, some important changes in its definition and management have occurred since the introduction of metrological traceability theory in laboratory medicine. In the traceability era, medical laboratories should rely on manufacturers who must ensure traceability of their diagnostic medical devices (IVD-MD) to the highest available references, providing bias correction during the trueness transfer process to calibrators before they are marketed. However, sometimes some bias can be observed arising from an insufficient correction during the traceability implementation.
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