The Effect of Goal-directed Hemodynamic Therapy in Radical Cystectomy

"The patients in GDT group will receive intravenous crystalloid fluid or vasopressor or inotropic agent according to the goal-directed therapy protocol utilizing FloTrac / EV1000 clinical platform (Edwards Lifesciences, Irvine, CA, USA).~After induction of anesthesia, the baseline stroke volume index (SVI) is measured and then 200-250 ml of crystalloid is administered over 5-10 minutes. If SVI increase by ≥10%, 200-250 ml of crystalloid is given repeatedly until the increase in SVI \<10%. If SVI does not increase by ≥10% and there is no decrease in mean arterial pressure (MAP), revaluate SVI every 10 minutes. Despite an increase in SVI of \<10% after fluid challenge, if a decrease in MAP is accompanied by cardiac index (CI) ≤ 2.5 L/min/m2, dobutamine is administered by continuous infusion. If there is a decrease in MAP but no decrease in CI, start low dose norepinephrine continuous infusion."