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Introduction
Rivaroxaban concentrations were measured in 127 inpatient samples using an HPLC‐MS/MS assay.
Methods
We compared this measurement with a calibrated anti‐Xa assay and performed PT, aPTT and dilute PT tests to assess the value of clot‐based assays in clinical decision‐making.
Results
The correlation between the anti‐Xa assay and the HPLC‐MS/MS at therapeutic concentrations was strong...
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