Fig. 4.
Receiver operating curves generated for changes in stroke volume (SV) induced by lung recruitment maneuver (LRM), changes in pulse pressure (PP) induced by LRM, changes in systolic arterial pressure (SAP) induced by LRM, and pulse pressure variations showing the ability to predict the effect of a 250 ml volume expansion given more than 10 min. LRM = consisted of applying a continuous positive airway pressure of 30 cm H2O for 30 s.