Related Experiment Video
Updated: Aug 20, 2025

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
Published on: March 25, 2022
Minimal water exchange with gel immersion: A safe and useful method to secure the visual field during balloon
Kensuke Yokoyama1, Tetsurou Miwata1, Tomonori Yano1
1Department of Medicine, Division of Gastroenterology, Jichi Medical University, Shimotsuke, Japan.
Abstract:
During balloon enteroscopy-assisted endoscopic retrograde cholangiography, the minimal water exchange method facilitates reaching the site and prevents pneumobilia, hepatic portal venous gas, and air embolism. However, the water may mix with bile or blood, obscuring the visual field. Yokoyama and colleagues demonstrate how the gel immersion method helps overcome this problem.
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