AustralieFrV1, Main, Exploration, bibRecord, 00C716

International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) standardization project for the measurement of lipoprotein(a). Phase 2 : Selection and properties of a proposed secondary reference material for lipoprotein(a)

Identifieur interne : 00C716 ( Main/Exploration ); précédent : 00C715; suivant : 00C717

International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) standardization project for the measurement of lipoprotein(a). Phase 2 : Selection and properties of a proposed secondary reference material for lipoprotein(a)

Auteurs : J. R. Tate [Australie] ; K. Berg [Norvège] ; R. Couderc [France] ; F. Dati [Allemagne] ; G. M. Kostner [Autriche] ; S. M. Marcovina [États-Unis] ; N. Rifai [États-Unis] ; I. Sakurabayashi [Japon] ; A. Steinmetz [Allemagne]

Source :

Clinical chemistry and laboratory medicine [ 1434-6621 ] ; 1999.

RBID : Pascal:00-0137065

Descripteurs français

Pascal (Inist)
- Lipoprotéine a, Analyse biochimique, Analyse quantitative, Normalisation, Matériau référence, Secondaire, Etalonnage, Coopération internationale, Homme.
Wicri :
- topic : Analyse quantitative, Normalisation, Coopération internationale, Homme.

English descriptors

KwdEn :
- Biochemical analysis, Calibration, Human, International cooperation, Lipoprotein a, Quantitative analysis, Reference material, Secondary, Standardization.

Abstract

The International Federation of Clinical Chemistry and Laboratory Medicine Working Group for the Standardization of Lipoprotein(a) Assays has initiated a project to select a secondary reference material for lipoprotein(a) that can standardize the measurement of this lipoprotein. Most of the analytical problems with lipoprotein(a) assays are due to apolipoprotein(a) kringle 4 type 2 reactive antibodies and values being expressed in mg/l mass units rather than as nmol/l of apolipoprotein(a) particles. In Phase 2, four manufactured materials were compared for analytical performance, commutability properties and method harmonization in 27 lipoprotein(a) test systems. Results of precision and linearity testing were comparable for all materials whereas testing for the harmonization effect resulted in an among-assay coefficient of variation for corrected lipoprotein(a) values of between 11% and 22%. The material that gave maximum harmonization achieved a variation of < 8% for 18 immunonephelometric and immunoturbidimetric assay systems. It can be hypothesized that this residual variation in part takes into account the inaccuracy of lipoprotein(a) measurement due to apolipoprotein(a) size polymorphism. On the basis of acceptable analytical performance, maximal harmonization effect and documented stability, a lyophilized material has been selected as the common calibrator for lipoprotein(a) to be used in a value transfer procedure by diagnostic companies.

Affiliations:

Allemagne, Australie, Autriche, France, Japon, Norvège, États-Unis
Massachusetts, Washington (État), Île-de-France, Østlandet
Boston, Oslo, Paris, Seattle
Université de Washington

Links toward previous steps (curation, corpus...)

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to stream PascalFrancis, to step Curation: 000136
to stream PascalFrancis, to step Checkpoint: 006006
to stream Main, to step Merge: 00D719
to stream Main, to step Curation: 00C716

Le document en format XML

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<series><title level="j" type="main">Clinical chemistry and laboratory medicine</title>
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<front><div type="abstract" xml:lang="en">The International Federation of Clinical Chemistry and Laboratory Medicine Working Group for the Standardization of Lipoprotein(a) Assays has initiated a project to select a secondary reference material for lipoprotein(a) that can standardize the measurement of this lipoprotein. Most of the analytical problems with lipoprotein(a) assays are due to apolipoprotein(a) kringle 4 type 2 reactive antibodies and values being expressed in mg/l mass units rather than as nmol/l of apolipoprotein(a) particles. In Phase 2, four manufactured materials were compared for analytical performance, commutability properties and method harmonization in 27 lipoprotein(a) test systems. Results of precision and linearity testing were comparable for all materials whereas testing for the harmonization effect resulted in an among-assay coefficient of variation for corrected lipoprotein(a) values of between 11% and 22%. The material that gave maximum harmonization achieved a variation of < 8% for 18 immunonephelometric and immunoturbidimetric assay systems. It can be hypothesized that this residual variation in part takes into account the inaccuracy of lipoprotein(a) measurement due to apolipoprotein(a) size polymorphism. On the basis of acceptable analytical performance, maximal harmonization effect and documented stability, a lyophilized material has been selected as the common calibrator for lipoprotein(a) to be used in a value transfer procedure by diagnostic companies.</div>
</front>
</TEI>
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<country name="Japon"><noRegion><name sortKey="Sakurabayashi, I" sort="Sakurabayashi, I" uniqKey="Sakurabayashi I" first="I." last="Sakurabayashi">I. Sakurabayashi</name>
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International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) standardization project for the measurement of lipoprotein(a). Phase 2 : Selection and properties of a proposed secondary reference material for lipoprotein(a)

International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) standardization project for the measurement of lipoprotein(a). Phase 2 : Selection and properties of a proposed secondary reference material for lipoprotein(a)

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri