Feasibility of the Drill Dilator as an Initial Dilation Device for Postoperative Biliary Strictures with Surgically Altered Anatomy
- 1Department of Gastroenterology, Hematology, and Clinical Immunology, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan
- 2Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan
Abstract
Background: Endoscopic treatment of postoperative biliary strictures in patients with surgically altered anatomy can be technically challenging. The Drill Dilator advances by rotational torque with minimal forward pushing, potentially facilitating dilation while maintaining endoscope stability. This study evaluated the feasibility and safety of the Drill Dilator as an initial dilation device for postoperative biliary strictures in patients with surgically altered anatomy. Methods: We retrospectively reviewed 46 endoscopic sessions for postoperative biliary strictures performed between December 2016 and April 2026. Among these, 18 initial treatment sessions were included in the comparative analysis. Six sessions in which the Drill Dilator was used as the initial dilation device were evaluated and compared with 12 sessions using conventional dilation devices. Results: The Drill Dilator successfully passed and dilated the stricture in all sessions (100%). Additional dilation with another device was required in 50% of sessions (3/6). Technical success was achieved in all sessions (100%). Mild post-ERCP cholangitis (PEC) occurred in two patients (33.3%), with no severe procedure-related adverse events. In the conventional dilation group, device passage and technical success rates were 100% (12/12) and 91.7% (11/12), respectively. Conclusions: The Drill Dilator was feasible as an initial dilation device for postoperative biliary strictures in patients with surgically altered anatomy. Its use may facilitate subsequent endoscopic dilation, particularly in situations where alignment between the dilation device and the bile duct is challenging.
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BibTeX
@article{yoshida2026feasibility,
title = {{Feasibility of the Drill Dilator as an Initial Dilation Device for Postoperative Biliary Strictures with Surgically Altered Anatomy}},
author = {Kenta Yoshida and Satoshi Sato and Chikara Iino and Kota Fujimaki and Keita Mikami and Keisuke Furusawa and Satoru Tsuruta and Yusuke Wakasa and Hayato Nagase and Norihisa Kimura and Keinosuke Ishido and Hirotake Sakuraba},
journal = {Journal of Clinical Medicine},
year = {2026},
month = nov,
doi = {10.3390/jcm15218666},
url = {https://www.mdpi.com/2077-0383/15/21/8666},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Feasibility of the Drill Dilator as an Initial Dilation Device for Postoperative Biliary Strictures with Surgically Altered Anatomy
AU - Kenta Yoshida
AU - Satoshi Sato
AU - Chikara Iino
AU - Kota Fujimaki
AU - Keita Mikami
AU - Keisuke Furusawa
AU - Satoru Tsuruta
AU - Yusuke Wakasa
AU - Hayato Nagase
AU - Norihisa Kimura
AU - Keinosuke Ishido
AU - Hirotake Sakuraba
PY - 2026
DA - 2026/11/06
JO - Journal of Clinical Medicine
DO - 10.3390/jcm15218666
UR - https://www.mdpi.com/2077-0383/15/21/8666
AB - Background: Endoscopic treatment of postoperative biliary strictures in patients with surgically altered anatomy can be technically challenging. The Drill Dilator advances by rotational torque with minimal forward pushing, potentially facilitating dilation while maintaining endoscope stability. This study evaluated the feasibility and safety of the Drill Dilator as an initial dilation device for postoperative biliary strictures in patients with surgically altered anatomy. Methods: We retrospectively reviewed 46 endoscopic sessions for postoperative biliary strictures performed between December 2016 and April 2026. Among these, 18 initial treatment sessions were included in the comparative analysis. Six sessions in which the Drill Dilator was used as the initial dilation device were evaluated and compared with 12 sessions using conventional dilation devices. Results: The Drill Dilator successfully passed and dilated the stricture in all sessions (100%). Additional dilation with another device was required in 50% of sessions (3/6). Technical success was achieved in all sessions (100%). Mild post-ERCP cholangitis (PEC) occurred in two patients (33.3%), with no severe procedure-related adverse events. In the conventional dilation group, device passage and technical success rates were 100% (12/12) and 91.7% (11/12), respectively. Conclusions: The Drill Dilator was feasible as an initial dilation device for postoperative biliary strictures in patients with surgically altered anatomy. Its use may facilitate subsequent endoscopic dilation, particularly in situations where alignment between the dilation device and the bile duct is challenging.
SN - 2077-0383
ER -