The paper presents the results of the development of a technology for the quantitative determination of D-dimer in blood with an immunochromatographic (LFIA) kit of reagents «LFIA-D-dimer» and instrument accounting of the results. Registration and processing of the digitized indicator of the intensity of staining of the LFIA-test strip using the LFIA-analyzer software allows quantifying the D-dimer content in the sample (in ng DDU/ml). The effectiveness of the proposed approach was evaluated on 258 clinical samples examined in the LFIA with visual and instrument accounting of the results, in comparison with the indicators of D-dimer determination in ELISA. The high reproducibility of the digitized LFIA results was shown - the coefficient of variation (CV) for samples in the range of 100-300 ng DDU/ml (near-threshold in relation to pathological values) was 2.5-5.1%; a tendency to increase CV with a further increase in the concentration of D-dimer was traced. A high correlation of the digitized LFIA result with the research data in the ELISA has been established, which makes it possible to recommend the technology for widespread use in urgent medicine.
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| http://dx.doi.org/10.51620/0869-2084-2022-67-2-91-96 | DOI Listing |
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