Efficacy of small-volume simethicone given at least 30 min before gastroscopy

Figure 1 Endoscopic scoring system. Score of 1: No bubbles; Score of 2: Minimal bubbles which the endoscopist must actively look for; Score of 3: Foam is obviously present but not severe; Score of 4: Severe foam obscuring vision; Area A: Esophagus; Area B: The antrum and angularis of the stomach; Area C: The body and fundus of the stomach; Area D: Duodenum. TMVS is the sum of the scores of areas A, B, C and D added together. TMVS: Total mucosal visibility score.

Figure 2 Workflow of patient enrollment.

Figure 3 Endoscopist contribution per group.

Figure 4 Percentage of patients with total mucosal visibility score of 4-5 during gastroscopy. TMVS: Total mucosal visibility score.

Figure 5 Endoscopic images of a patient in the placebo group (total mucosal visibility score 13).

Figure 6 Endoscopic images of a patient in the simethicone group (total mucosal visibility score 4).

Figure 7 Correlation between volume of additional water flushes during gastroscopy (mL) and total mucosal inspection time (s).