A prospective, multi-center, randomized controlled trial to evaluate safety and effectiveness of endoscopic hemostatic powder, 'Nexpowder' for hemostatic treatments of nonvariceal upper gastrointestinal bleeding. This study is a prospective, multi-center, single blind (for patients), controlled investigation planned to evaluate safety and effectiveness of Nexpowder with 352 subject patients.
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The rates of re-bleeding
Timeframe: 3 days