Comparison of PVI-guided Fluid Management With Traditional Fluid Management in Colorectal Surgery

pvı- guided total amount of crystalloid volume of fluid infused during colorectal surgery pvı-guided(according to pvi value) fluid infused during whole procedure 2 ml/kg/h infusion during surgery If PVI value \<%13 and if MAP\>65mmHg continue with 2 ml/kg/h cristalloid infusion If PVI value \<%13 and if MAP\>65mmHg 5 mcg efedrin intravenous bolus till MAP\>65 mmHg If PVI value \>%13 and MAP\>65 mmHg infuse 250 ml Gelofusine bolus up to PVI value lowers to %13 every 5 minute If PVI value \>%13 and MAP \<65 mmHg infuse 250 ml Gelofusine bolus and 5 mcg efedrin intravenous up to PVI value lowers to %13

traditional-guided total amount of crystalloid volume of fluid infused during colorectal surgery traditional-guided fluid infused during whole procedure 4-8 ml/kg/h infusion during surgery If MAP \<65 mmHg or \<30%of basal value, infuse 250 ml Gelofusine bolus and 5 mcg efedrin If MAP\>65 mmHg no intervention