Title: Properties and units for urinary calculi
Chairman: Antonin Jabor
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
<project announcement published