Figure 5From: 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 pH of the duodenal balloon group showed no significant difference ( P = 0.423), but a significant difference was seen in the regular group ( P = 0.037). The ΔpH showed no significant difference between the two groups ( P = 0.549). Back to article page