Endoscopic ultrasonography-guided gallbladder drainage (EUS-GBD) using the current plastic stent (PS) system requires multiple steps for stent deployment and carries the risk of bile leakage from the puncture site. In this study, we developed a single-step PS system that includes a 3F electrocautery metal tip on the inner sheath mounted with a 7F/4-cm double-pigtail PS and experimentally evaluated it on a gallbladder model mimicking EUS-GBD. We assessed procedure time, intra-gallbladder pressure-drop ratios, and bile leakage using a newly developed single-step PS system, comparing it with the current PS system during drainage attempts on a gallbladder model. Mean duration times for the three attempts were 2 minutes 59 seconds and 27 seconds for the current PS system and the newly developed PS system groups, respectively (P < 0.001). Mean intra-gallbladder pressure-drop ratios were 86.7% in the current PS system group and 7.6% in the newly developed PS system group (P < 0.001). The newly developed PS system prevented bile leakage from the puncture site. The newly developed PS system saved significant time, maintained intra-gallbladder pressure, and prevented bile leakage during the procedure when compared with the current PS system.

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).

Bibliographical Record
Tesshin Ban, Yoshimasa Kubota, Takashi Joh. Newly developed plastic stent delivery system for endoscopic ultrasonography-guided gallbladder drainage: Experiments on gallbladder models. Endosc Int Open 2025; 13: a27340383.
DOI: 10.1055/a-2734-0383