Probabilistic sensitivity analysis using institutional drug costs. Two thousand simulation samples were used to confirm analysis using institutional costs. y-axis represents the incremental cost and x-axis represents incremental adverse event averted. Samples in north quadrants indicate more expensive drug, while samples in south quadrants indicate more cost savings. East quadrants represent a higher rate of adverse events averted, and samples in west quadrants mean a lower rate of adverse events averted. (A) Argatroban compared with fondaparinux. (B) Argatroban compared with bivalirudin. (C) Bivalirudin compared with fondaparinux.