Usefulness of continuous suction mouthpiece during esophagogastroduodenoscopy: A single-center, prospective, randomized study

Figure 1 The continuous suction mouthpiece. A: The continuous suction mouthpiece (CSM) without the mouthpiece; B, C: The CSM with the mouthpiece.

Figure 2 Use of the continuous suction mouthpiece. A: Image showing actual use of the continuous suction mouthpiece (CSM); B: Endoscopist’s view of the CSM during its use; C: Patient’s view of the CSM during its use.

Figure 3 Obvious aspiration pneumonia was not observed in any of the participating patients. A: Extent of salivary flow. The grade of extent of salivary flow was significantly lower in patients with the continuous suction mouthpiece (CSM) than in patients with the conventional mouthpiece (P < 0.001); B: Frequency of saliva suction. No suction events were observed in patients with the CSM, while 3/98 (3.1%) of the patients with the conventional mouthpiece required suctioning during esophagogastroduodenoscopy (EGD) (P = 0.082); C: Number of choking episodes. Although not statistically significant, less frequent choking episodes were observed in patients with the CSM than in patients with the conventional mouthpiece (P = 0.084).