Fig. 2
Survival graph (Kaplan-Meier plot) for patients according to variation (0–24 h) of rSO2 with treatment. No responders: which showed no improvement or a decrease in rSO2 value; Responders: patients which showed an improvement in rSO2 value to reach rSO2 of >60 % at 24 h and; Partially responders: patients in which the rSO2 value improved but did not reach >60 % at 24 h; ICU LOS intensive care unit length of stay (days), rSO 2 regional oxygen saturation index