ClearEndoclip Versus EZ Clip for Upper Gastrointestinal Ulcer Bleeding

Inclusion Criteria: * Men and women aged 20 to 80 * The patients who came to the emergency room due to upper gastrointestinal bleeding with as follows: peptic ulcer with acute bleeding or protruding vascular exposure (Forrest class Ia-IIa), anastomotic vascular ulcer bleeding, bleeding from endoscopic submucosal dissection or endoscopic mucosal resection site after 24 hours * American Society of Anesthesiologist (ASA) Physical Status 1 - 3 * Patients with adequate patient compliance and adequate geographical distance for follow-up. character Exclusion Criteria: * Patients with gastrointestinal bleeding who are not recommended to clip Bleeding from a malignant tumor Hemorrhagic gastritis Angiodysplasia variceal bleeding * Bleeding during endoscopic submucosal dissection or endoscopic mucosal resection * Patients with insufficient clinical information * Pregnant or lactating patients * Patients or guardians who have not obtained informed consent