Fig. 1. Plasma electrolytes and blood hemoglobin (mm) versus time after infusion of 4 ml/kg NaCl, 7.5% (○); 4 ml/kg NaCl, 0.9% (▿); or 32 ml/kg NaCl, 0.9% (▵). The changes over time depended on the infused fluid for all variables. P values are shown in the top right of each graph (multivariate analysis of variance, between groups). Post hoc comparisons were performed at each time point and between each of two succeeding time points using one-way analysis of variance (**P < 0.001 and *P < 0.01). The bars above the x-axes denote time intervals with significant changes. Data are presented as geometric mean with 95% confidence interval. 1, 11, 24, and 48 h = hours after surgery; Inf = after infusion; Pre = baseline; Sur = 25 min after incision.