Figure 8From: Effectiveness of CO2-insufflated endoscopic submucosal dissection with the duodenal balloon occlusion method for early esophageal or gastric cancer: a randomized case control prospective study The VAS scores (0 to 10) for the occurrence of nausea due to abdominal distension after ESD ranged from 0 to 1 in the duodenal balloon group and from 3 to 7 in the regular group, showing a significant difference between the two groups ( P = 0.031). Back to article page