Fig. 1

Volumes of red blood cells transfused during the first six hours of admission. Volumes are shown according to quartile distribution of A ΔPCO_{2 fem}. B SvO_{2 fem} and C lactate. All data are reported as mean ± SD. ΔPCO_{2 fem} femoral venous-arterial difference in carbon dioxide pressure. SvO_{2 fem} femoral venous oxygen saturation