Abstract Number: PB0565
Meeting: ISTH 2022 Congress
Background: Apixaban (Eliquis) is a direct factor Xa inhibitor used in the prevention of thrombotic diseases. Due to its predictable pharmacokinetics and wide therapeutic window, no therapeutic range in which the clinical outcome is optimized has been established in conjunction with apixaban market approval. However, because hemostasis is a balance between the tendency to clot and the risk of bleeding, anticoagulants have an inherent risk of causing bleeding, which indeed is the most common side effect of apixaban. Although the manufacturer of apixaban has stated that regular monitoring is not needed, quantitative assays should be available to aid in the assessment of a patient’s anticoagulant status.
Aims: The INNOVANCE Anti-Xa assay for the quantitative determination of apixaban is a chromogenic assay for which a new application for the Sysmex® CN-3000/CN-6000 Systems was developed. The aim of the studies was to assess the performance of this application.
Methods: The following studies were conducted using the Sysmex CN-6000 System: limit of quantitation (LoQ), linearity, precision, dilution recovery, and method comparison versus the Sysmex CS-5100 System. Performance characteristics were confirmed for the Sysmex CN-3000 System by method comparison versus the Sysmex CN-6000 System.
Results: Based on the results from the LoQ, linearity, and precision studies, the analytical measuring interval for the application was defined to be 20–350 ng/mL. An extended measuring interval (1:2 sample dilution) of 350–700 ng/mL was demonstrated by dilution-recovery studies. Good comparability of the INNOVANCE Anti-Xa assay on the Sysmex CN-6000 System versus the INNOVANCE Anti-Xa assay on the Sysmex CS-5100 System could also be shown.
Conclusion(s): The INNOVANCE Anti-Xa assay demonstrates good performance on the Sysmex CN-3000/CN-6000 System and can be used for the quantitative determination of apixaban in human citrated plasma.
To cite this abstract in AMA style:Pahren D, Wilkens M, Groß U, Merz M, Bußfeld D. Performance Evaluation of the INNOVANCE Anti-Xa Assay for the Quantitative Determination of Apixaban on the Sysmex CN-3000/CN-6000 Systems [abstract]. https://abstracts.isth.org/abstract/performance-evaluation-of-the-innovance-anti-xa-assay-for-the-quantitative-determination-of-apixaban-on-the-sysmex-cn-3000-cn-6000-systems/. Accessed September 22, 2023.
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