Effect of normothermia (NT), hypothermia (HT), hemorrhagic shock during normothermia (NT/HS), and hemorrhage during hypothermia (HT/HS) on oral mucosal perfusion (μflow), red blood cell velocity (μVel), and amount of tissue haemoglobin (μHb). Effects of hemorrhage: change of μflow, μVel, and μHb after 30 minutes of shock (3.0 h) versus μflow, μVel, and μHb before shock (2.5 h) during normothermia (NT/HS) and hypothermia (HT/HS). Effect of hypothermia without hemorrhage: change of μflow, μVel, and μHb at the corresponding time point (3.0 h) versus baseline conditions under normothermia (NT) and hypothermia (HT). Data are presented as absolute changes for n = 5 dogs, mean ± SE, *P < 0.05.