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Abstract : BACKGROUND AND AIMS:Lactate levels predict outcomes after hepatectomy. We compared metabolic effects of lactated versus lactate free solutions in living donor hepatectomy./ppbMETHODS: /bConsecutive right lobe donors ( = 53) were alternatively allotted to lactated Ringer's solution and normal saline (Group L-control) or acetated crystalloid (Sterofundin B Braun Group S -study group) in an observational prospective randomised study. The primary outcome measure was lactate level, and secondary outcomes were base excess, bicarbonate, glucose and chloride intra- and post-operatively. Mann-Whitney and Chi-square tests were used for analysis./ppbRESULTS: /bThe intraoperative, post-operative lactate levels and the time for normalisation were comparable. Group L had significantly lower intraoperative bicarbonate levels (mmol/L) at 6 and 8 h (20.0 ± 2.14 vs. 21.3 ± 1.6, = 0.0471; 18.68 ± 2.04 vs. 20.39 ± 17, = 0.002), base excess at 4 and 6 h (mmol/L) (-3.64 ± 2.73 vs. -3.0 ± 1.52, = 0.031; -6.64 ± 2.76 vs. -4.35 ± 1.7 = 0.006). The intraoperative chloride levels (mmol/L) were higher in group L at 4 and 8 h (108 ± 5.9 vs. 105.99 ± 2.76, = 0.0471; 109.51 ± 3.86 vs. 106.93 ± 3.09, = 0.002). Intraoperative glucose (mg/dL) at 6 h was higher in group L, 160.55 ± 31.52 vs. 145.5 ± 24.29, = 0.043. The highest post-operative chloride (mmol/L) was higher in Group L (112.3 ± 3.86 vs. 109.81 ± 3.72, = 0.034). Post-operative base excess and bicarbonate showed an improved profile in Group S (-7.37 ± 2.99 vs. -5.06 ± 1.71 = 0.001 and 17.79 ± 2.23 vs. 19.68 ± 1.51 = 0.005)./ppbCONCLUSION: /bAcetated fluids were associated with higher levels of bicarbonate, lesser base deficit, glucose and chloride but no difference in lactate levels in comparison with Ringer's lactate and normal saline in living donor hepatectomy.