Automated Closed-Loop Versus Restrictive Fluid Therapy in Abdominal Surgery

Patients receive fluids in the form of 100ml boluses of crystalloid (Plasmalyte) over 6 minutes via an automated closed-loop goal-directed fluid therapy (GDFT) system guided by non-invasive flow monitoring (Clearsight system). Additional boluses of colloid or crystalloid can be administered under the attending anesthesiologist's discretion (e.g. to compensate blood loss) .

Patients receive fluids (Plasmalyte) via a restrictive approach with a baseline of of 4ml/kg/h. Additional boluses of colloid or crystalloid can be administered under the attending anesthesiologist's discretion (e.g. to compensate blood loss) .