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Title

A multicenter evaluation of a new quantitative highly sensitive D-dimer assay for exclusion of venous thromboembolism

Authors
Palareti, Gualtiero
Aguilar, Carlos
Legnani, Cristina
Peetz, Dirk
Published in Thrombosis and Haemostasis. 2008, vol. 100, no. 3, p. 505-12
Abstract D-dimer testing is widely applied for exclusion of deep-vein thrombosis (DVT) and pulmonary embolism (PE). We report on a multicenter performance evaluation of a new particle-enhanced immunoassay, Innovance D-Dimer. Innovance D-Dimer assay was performed in 1,543 frozen samples from outpatients suspected of DVT and/or PE enrolled in three management studies as well as in a routine clinical practice. Samples were assayed on BCS/BCS XP, BCT as well as Sysmex CA-7000, CA-1500 and CA-560 analyzers (cut-off on all analyzers: 0.5 mg/l). Stratus CS D-Dimer and Vidas D-Dimer Exclusion were used for comparison. The precision study indicated total coefficients of variation ranging from 2.1% to 8.4% depending on the analyzer and on the sample. Sensitivity and negative predictive values were above 99% and their lower 95% confidence interval were equal or above 97.4% and 98.6%, respectively. Specificity ranged from 38.2% to 40.4% and the respective lower 95% confidence intervals from 35.5% to 37.7%. Area under the curve was 0.90 for all assay systems except for Innovance D-Dimer with BCT (0.89). Two samples from patients with distal DVT tested negative with all assay systems. One patient with high pre-test clinical probability and proximal DVT tested negative with Vidas D-Dimer Exclusion. Our data indicate that the performances of Innovance D-Dimer, regardless of the analyzer, are similar to the reference methods, and that this assay can be used for the exclusion of venous thromboembolic disease.
Keywords AlgorithmsCalibrationChemistry, Clinical/methodsDimerizationFibrin Fibrinogen Degradation Products/analysisHumansImmunoassay/instrumentation/methodsPredictive Value of TestsProbabilityRegression AnalysisReproducibility of ResultsSensitivity and SpecificityVenous Thromboembolism/blood/diagnosis
Identifiers
PMID: 18766269
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Research group Anticorps antiphospholipides (12)
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DE MOERLOOSE, Philippe et al. A multicenter evaluation of a new quantitative highly sensitive D-dimer assay for exclusion of venous thromboembolism. In: Thrombosis and Haemostasis, 2008, vol. 100, n° 3, p. 505-12. doi: 10.1160/TH08-04-0202 https://archive-ouverte.unige.ch/unige:1922

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Deposited on : 2009-06-09

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