Figure 4From: O2 delivery and CO2 production during cardiopulmonary bypass as determinants of acute kidney injury: time for a goal-directed perfusion management?Acute kidney injury rates in patient groups according to the critical values of DO 2 , DO 2 /VCO 2 ratio and hematocrit, with sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV).Back to article page