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Individual plasma concentrations of ampicillin during surgery. Blue triangles indicate the start of infusion of ampicillin–sulbactam every 3 h over 30 min. Orange rectangles indicate the MIC of Enterobacterales divided by the unbound fraction of ampicillin (32 mg/L/0.72). *Patients with maintenance dialysis preoperatively. ABPC, ampicillin; ft > MIC, free time above the MIC.
