Abstract
A high-performance liquid chromatographic (HPLC) method was developed using solid-phase extraction, o-phthalaldehyde (OPA) derivatization and fluorescence detection for the determination of the direct thrombin inhibitor bivalirudin in human plasma and urine. The use of this assay will facilitate the study of the pharmacodynamics of bivalirudin in studies of special patient populations. A C 18 bioanalytical column at a flow rate of 1 ml/min with an aqueous trifluoroacetic acid (0.1% TFA in deionized water, pH 2.2, v/v) mobile phase and methanol gradient was used. The assay demonstrated linearity from 3 to 20 μg/ml bivalirudin in plasma, with a detection limit of 1 μg/ml. The method was utilized in a study evaluating the pharmacokinetic and pharmacodynamic effects of bivalirudin in patients undergoing percutaneous coronary interventions (PCIs).
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