Fig. 4From: The tidal volume challenge improves the reliability of dynamic preload indices during robot-assisted laparoscopic surgery in the Trendelenburg position with lung-protective ventilationComparison of receive -operating characteristic curves of PPV6, PPV8, ΔPPV6–8, SVV6, SVV8 and ΔSVV6–8 to predict fluid responsiveness during robot-assisted laparoscopic surgery in the Trendelenburg position under lung-protective ventilation. PPV6, pulse pressure variation during tidal volume at 6 ml/kg predicted body weight (PBW); PPV8, pulse pressure variation during tidal volume at 8 ml/kg PBW; ΔPPV6–8, change in value of pulse pressure variation after tidal volume challenge; SVV6, stroke volume variation during tidal volume at 6 ml/kg predicted body weight (PBW); SVV8, stroke volume variation during tidal volume at 8 ml/kg PBW; ΔSVV6–8, change in value of stroke volume variation after tidal volume challenge; area under the ROC curve appears in cartouche with 95% confidence intervalBack to article page