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  • Title: Comparison of Procalcitonin Assays on KRYPTOR and LIAISON® XL Analyzers.
    Author: Dipalo M, Gnocchi C, Avanzini P, Musa R, Di Pietro M, Aloe R.
    Journal: Diagnostics (Basel); 2019 Aug 08; 9(3):. PubMed ID: 31398868.
    Abstract:
    Our laboratory performs procalcitonin (PCT) assays on a Brahms KRYPTOR analyzer with the Brahms PCT sensitive Kryptor kit. In this study, we wanted to compare the assays obtained in this way with the ones performed on the LIAISON® XL. From January to May 2017, 171 samples were analyzed, of which 65 from female patients (age: 22-98 years) and 106 from male patients (age: 16-97 years). The PCT determination was performed using the LIAISON® XL and KRYPTOR analyzers, by chemiluminescence (Chemiluminescence immunoassay-CLIA) (LIAISON® BRAHMS PCT® II GEN) and immunofluorescence (Brahms PCT sensitive Kryptor) assay, respectively. For the LIAISON® BRAHMS PCT® II GEN, 52% of the results were placed between 0.0 and 0.5 ng/mL, 18% between 0.5 and 2.0 ng/mL, and 30% between 2.0 and 100 ng/mL; the mean was 4.09 ng/mL, the median 0.456 ng/mL, the maximum value 97.2 ng/mL, and the minimum value 0.02 ng/mL. For the Brahms PCT sensitive Kryptor, 55% of the results were positioned between 0.0 and 0.5 ng/mL, 21% between 0.5 and 2.0 ng/mL, and 24% between 2.0 and 100 ng/mL; the mean was 3.72 ng/mL, the median 0.39 ng/mL, the maximum value 103 ng/mL, and the minimum value 0.01 ng/mL. The mean of the results obtained with the two methods showed no significant differences (3.717 for Kryptor and 4.094 for LIAISON®). PCT assay with Brahms reagents, both on the Kryptor and LIAISON®XL platforms, offers excellent performance in terms of sensitivity and specificity.
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