Study on usefulness of jelly injection in hemostasis during endoscopic submucosa dissection

Interventions: For bleeding during endoscopic submucosal dissection, an oral rehydration jelly is injected to identify the bleeding site. There is no upper limit to the number and amount of jelly injections.
For bleeding during endoscopic submucosal dissection, an oral rehydration jelly is injected to identify the bleeding site. There is no upper limit to the number and amount of jelly injections.
Primary outcome(s): In Phase I, OS-1 jelly was used to improve the field of view and evaluate safety when hemostasis occurred. In Phase II, the time taken to identify the bleeding site in the normal group and jelly combination group.
Study Design: Parallel Randomized