Gel Immersion Endoscopic Mucosal Resection (EMR) for Superficial Nonampullary Duodenal Epithelial Tumors May Reduce Procedure Time Compared with Underwater EMR (with Video)

Figure 2

(a, b) Underwater immersion, the endoscopic view is sometimes poor due to the difficult accumulation of water and mixture of air bubbles or intestinal fluids. (c, d) The viscoelasticity of the gel allows it to stay in the lumen and easily remove air bubbles and intestinal fluids without mixing, resulting in a good field of view and facilitating snaring.

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