Fig. 8

The predictive values of tc-artPCO₂, shock index, and arterial lactate for the critical level of systemic oxygen delivery. A Receiver operating characteristic curves for tc-artPCO₂, shock index, and arterial lactate to distinguish between the critical level of systemic oxygen delivery (DO_2crit) < 11.72 and DO_2crit ≥ 11.72 mL/kg/min. B Characteristics of prognostic indexes for detecting the critical level of systemic oxygen delivery: tc-artPCO₂, shock index, and arterial lactate