Fig. 2From: Ability of the Analgesia Nociception Index variations to identify a response to a volume expansion of 250 mL of crystalloids in the operating room (REVANI): a prospective observational studyReceiver operating characteristics (ROC) curves evaluating the ability of baseline PPV and SVV, and of changes in Analgesia Nociceptive Index (ANI) to detect an increase in stroke volume ≥ 10% following a volume expansion of 250 mL saline 0.9%Back to article page