Fig. 3From: Perioperative changes in fluid distribution and haemodynamics in acute high-risk abdominal surgeryPreload dependency and overhydration in the perioperative period for acute high-risk abdominal surgery: A Overhydration, defined as relative fluid overload (RFO) > 15%, measured by bioimpedance spectroscopy; B preload dependency defined as stroke volume increase during fluid challenge or passive leg raise manoeuvre, *p < 0.05Back to article page