Novel Modified Water Balloon for Mini-Probe Endoscopic Ultrasonography in Diagnosis of Esophageal and Gastric Submucosal Lesions: A Dual-Center Retrospective Study

Objective

Endoscopic ultrasonography (EUS) is commonly used for preoperative diagnosis of upper gastrointestinal submucosal lesions (SMLs), but it remains technically challenging due to rapid water drainage and the risk of aspiration. This study evaluated the efficacy and safety of a novel modified water balloon (WB) for mini-probe EUS compared to the conventional water immersion (WI) method.