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CC BY-NC-ND 4.0 · Endosc Int Open 2024; 12(08): E955-E961
DOI: 10.1055/a-2351-0647
Original article

Mechanical evaluation of the dilation force of dilation devices during interventional endoscopic ultrasound

Takeshi Ogura
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Saori Ueno
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Akitoshi Hakoda 
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Atsushi Okuda 
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Nobu Nishioka
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Jun Sakamoto
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Masahiro Yamamura
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Nobuhiro Hattori
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Kimi Bessho
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Hiroki Nishikawa
1   2nd Department of Internal Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan (Ringgold ID: RIN13010)
,
Rie Kanaoka
2   Department of Business planning, Kaneka Medix Corporation, Osaka, Japan (Ringgold ID: RIN88336)
,
Youhei Kurose
2   Department of Business planning, Kaneka Medix Corporation, Osaka, Japan (Ringgold ID: RIN88336)
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Abstract

Background and study aims To insert the metal stent delivery system (8.5F) during interventional endoscopic ultrasound (I-EUS), several dilation steps are needed, which may be related to increased bile leakage from a fistula. There have been no definitive studies of dilation force. The aim of the present study was to evaluate dilation force during I-EUS using several dilation devices.

Methods In the present study, seven dilation devices were evaluated including bougie dilators such as a straight-shaped dilator (the ES dilator, Soehendra dilator, a standard ERCP catheter) a screw-shaped dilator (Tornus ES, Soehendra stent retriever), and a 4-mm balloon catheter (REN biliary balloon catheter, Hurricane RX). The diameter of each dilator and dilation force were measured.

Results Of the bougie dilators, the dilation force of the ES dilator was the highest (0.908±0.035 kg). Of the balloon catheters, the dilation force of the Hurricane RX (3.261±0.024 kg) was slightly higher than that of the REN (3.159±0.072 kg). Of the bougie dilators, although the diameter of the ES dilator was not larger than that of the Tornus ES, the dilation force was stronger. Similarly, the diameter of the Soehendra stent retriever was greater than that of the ERCP catheter or Soehendra dilator and the dilation force was lower.

Conclusions Compared with bougie dilators, balloon catheters have stronger dilation force according to our experimental study. The present results should be evaluated in clinical trials.

Keywords

Endoscopic ultrasonography - Intervention EUS - Biliary tract


Publication History

Received: 22 April 2024

Accepted after revision: 13 June 2024

Accepted Manuscript online:
24 June 2024

Article published online:
08 August 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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