Fig. 3From: Effect of preoperative oral rehydration before cesarean section on ultrasound assessment of gastric volume and intraoperative hemodynamic changes: a randomized controlled trialThe total number of vasopressor boluses after inducing combined spinal epidural anesthesia. The probability was calculated using the Kruskal–Wallis test by ranks. A pairwise comparison was performed using Dunn’s test if the Kruskal–Wallis test was significant*Group O < Group Cn.s., not significantBack to article page