Fig. 5

Linear regression analyses of the gradient between tcPCO₂ and artPCO₂ with hemodynamic parameters. There were strong relationships of tc-artPCO₂ with (A) cardiac output measured by pulmonary artery thermodilution (r = −0.787, P < 0.001), B cardiac output measured by transpulmonary thermodilution (r = −0.738, P < 0.001), and C tcPO₂ (r = −0.878, P < 0.001). Solid line represents linear regression between tc-artPCO₂ with the parameters. Dash lines indicate 95% confidence intervals. tcPCO₂, transcutaneous partial pressure of carbon dioxide; CO_PATD, cardiac output measured by pulmonary artery thermodilution; CO_TPTD, cardiac output measured by transpulmonary thermodilution; tcPO₂, transcutaneous partial pressure of oxygen