Fig. 5From: Evaluation of end-tidal carbon dioxide gradient as a predictor of volume responsiveness in spontaneously breathing healthy adultsReceiver operating characteristics curves regarding the ability of ET-CO2 to discriminate responders (CO increase ≥ 12%) and non-responders after a PLR maneuver. ET-CO2, end-tidal carbon dioxide; CO, cardiac output; PLR, passive leg riseBack to article page