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Current Project

Chemistry and Human Health Division (VII)


Number: 2001-070-1-700

Title: Properties and units for urinary calculi

Task Group
Antonin Jabor

Members: Pedro Soares de Araujo, René Dybkaer, Urban Forsum, Wolf R. Külpmann, and Gunnar Nordin

To work out properties and units for Urinary Calculi based on the former C-NPU commission's concepts and syntactic rules. The C-NPU commission, maintained as a joint IFCC-IUPAC activity for two decades, has as its main task to promote and maintain scientifically and conceptually sound ways of expressing the outcome of measurements and other examinations in laboratory medicine. The NPU coding scheme and vocabulary, based on the SI system, concepts theory and high-level international standards, is the main outcome and should be the cornerstone for expressing measurements within international communication standards.

> See former Series on Properties and Units in the Clinical Laboratory Sciences

Urinary calculi (urinary stones) consist of chemically defined substances and other materials (e.g. foreign bodies, surgical fibers). A calculus is frequently composed of a nucleus surrounded by layers. The composition of the calculus is unknown before analysis, i.e. the number and properties of all components in the calculus are unpredictable. Urinary calculus examination is performed both in routine laboratories and in specialized centers. Different laboratories use different technical equipment and chemical analysis is used together with physical methods. Communication between laboratories and users needs a standardized nomenclature and terminology. The morphology of urinary calculi is the base of the classification in certain countries, chemical composition in others. Therefore, it is difficult to propose a general of nomenclature and terminology for urinary calculi. The proposed system reflects both the recommended structure of terms used in other areas of clinical laboratory sciences and the utilized examination procedures. Further, the described structure could be used as a template for the nomenclature and terminology in other areas of calculus analysis in human diseases (e.g. gall stone, salivary stone, and prostate calculus). The project conforms to the IUPAC strategic goals 2 and 4 i.e. to promote standardized nomenclature, symbols, terminology and methodology in the chemical sciences as well as to facilitate the development of effective channels of communication in international chemistry community.


Last Update: 30 January 2002

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