Fig. 7
Linear regression analyses of systemic oxygen delivery and (A) tc-artPCO2, B tcPO2, C shock index, D heart rate (HR), E mean arterial pressure, and F lactate level. Liner regression analyses showed that there were strong negative correlations of systemic oxygen delivery with tc-artPCO2 (r = 0.77, P < 0.001) and significant positive correlations of systemic oxygen delivery with tcPO2 (r = 0.72, P < 0.001) and mean arterial pressure (r = 0.75, P < 0.001). N = 42. DO2, systemic oxygen delivery; tc-artPCO2, gradient between transcutaneous and arterial partial pressures of carbon dioxide; tcPO2, transcutaneous partial pressure of oxygen; HR, heart rate; MAP, mean artery pressure