Magnetic Luminex® assays are magnetic bead-based antibody microarrays that can be used to facilitate simultaneous quantitation in a single sample [17 (link)]. Previous studies have demonstrated the feasibility of using Luminex to measure cytokines in pericardial fluid [16 (link),18 (link),19 (link)]. In the study, we custom-made a Luminex (R&D Systems, Inc., Minneapolis, MN, USA) panel including MPO to assess the impact of pericardial fluid on POAF. In addition, all the pericardial fluid samples were optimally diluted to ensure cytokine levels fell within the dynamic detection range of the assay. According to the manufacturer’s instructions, all the standards and samples were run in duplicate.
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