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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter / Tate, Jillian R.

IMPACT FACTOR increased in 2015: 3.017
Rank 5 out of 30 in category Medical Laboratory Technology in the 2014 Thomson Reuters Journal Citation Report/Science Edition

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Source Normalized Impact per Paper (SNIP) 2015: 0.982
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Plasma Brain Natriuretic Peptide Measured by Fully-Automated Immunoassay and by Immunoradiometric Assay Compared

Silvia Del Ry / Daniela Giannessi / Aldo Clerico

Citation Information: Clinical Chemistry and Laboratory Medicine. Volume 39, Issue 5, Pages 446–450, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2001.070, June 2005

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The clinical relevance of measuring plasma brain natriuretic peptide (BNP) is well-known, especially in patients with heart failure. Recently, a new method for measuring BNP, called TRIAGE®, has been developed which can be used for point-of-care testing of patients with congestive heart failure. The aim of the present study is to compare the analytical performance of this fully-automated method to that of an immunoradiometric assay (IRMA), routinely used to measure BNP. The TRIAGE® method is a non-competitive immunofluorometric assay which uses two different binding phases, specific for two different epitopes of the BNP amino acid chain, to form a sandwich with the specific ligand (i.e., BNP). A polyclonal antibody is included in the fluorescent immunoassay reagents which are contained in the assay devices and a monoclonal antibody is immobilized in the detection lane of the assay device. The imprecision of the TRIAGE® method was approximately 12% for BNP concentrations in the normal range and about 18% for BNP concentrations above the normal range. The mean reading time of the TRIAGE® method was 14.5±8.6 min. A close linear relationship was found between the BNP values measured with the two methods (TRIAGE=24.6+0.933 IRMA; r=0.932, n=83). The TRIAGE® method is indicated for BNP assay in ambulatory and coronary or emergency units, where usually only a few samples (preferentially whole blood samples) must be measured in a short time. The IRMA method should be preferred for pathophysiological studies, requiring the highest degree of precision and sensitivity for simultaneous measurement of several stored plasma samples or tissue extracts.

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