Goal Directed Fluid Management , Pvi

"GDFM Group: 500 ml bolus crystalloid after~2 ml \\ kg crystalloid infusion to be started~If PVI \<13 MAP is \<65 mmHg, continue infusion of fluid, 1-2 µg NE bolus to be entered after 5 min.~PVI \<13 MAP\> 65 mmHg to continue fluid infusion If PVI\> 13 MAP \<65 mmHg, 250 ml bolus crystalloid \\ colloid will be given and bolus 1-2 µg NE, If it continues after 5 minutes, liquid and NE doses will be repeated. Liquid treatment will be continued until PVI \<13.~PVI\> 13 MAP \<65 mmHg 250 ml bolus fluid to be given, if continued 5 minutes later to be repeated,repetition of fluid will continue until PVl \<13."