Open Access
CC BY-NC-ND 4.0 · Endosc Int Open 2024; 12(11): E1374-E1378
DOI: 10.1055/a-2422-2425
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Feasibility of newly designed rotatable sphincterotome for endoscopic sphincterotomy (with video)

1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Kazuki Hayashi
2   Department of Gastroenterology, Nagoya City University East Medical Center, Nagoya, Japan (Ringgold ID: RIN36975)
,
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Fumihiro Okumura
3   Department of Gastroenterology, Gifu Prefectural Tajimi Hospital, Tajimi, Japan (Ringgold ID: RIN37079)
,
Kaiki Anbe
4   Department of Gastroenterology, Toyokawa Municipal Hospital, Toyokawa, Japan (Ringgold ID: RIN73900)
,
Katsuyuki Miyabe
5   Department of Gastroenterology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan (Ringgold ID: RIN13789)
,
Atsuyuki Hirano
6   Department of Gastroenterology, Nagoya City University West Medical Center, Nagoya, Japan (Ringgold ID: RIN36744)
,
Hiroki Takada
7   Department of Gastroenterology, Kasugai Municipal Hospital, Kasugai, Japan (Ringgold ID: RIN37027)
,
Naruomi Jinno
8   Department of Gastroenterology, Japan Community Healthcare Organisation Chukyo Hospital, Nagoya, Japan (Ringgold ID: RIN13730)
,
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Kenta Kachi
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Hidenori Sahashi
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Akihisa Adachi
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Tadashi Toyohara
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Kayoko Kuno
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Yusuke Kito
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
,
Hiromi Kataoka
1   Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan (Ringgold ID: RIN38386)
› Author Affiliations
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Abstract

Background and study aims Endoscopic sphincterotomy can be challenging especially in patients with surgically altered anatomy. Although a rotatable sphincterotome (r-sphincterotome) may be useful, its rotational function is often inadequate. We evaluated the feasibility of a newly designed r-sphincterotome equipped with a well-conceived cutting wire.

Methods We measured the movement and dynamics of both the newly designed r-sphincterotome and two existing r-sphincterotomes using in-house equipment. Ideally, the rotational force exerted at the proximal end should transmit directly to the distal end. But it is often challenging, particularly within the constraints of a bent endoscope and working channel. We collected data regarding deviation from the ideal value 10 times for each sphincterotome.

Results The deviation from the ideal value was significantly lower with the newly designed r-sphincterotome than with the conventional r-sphincterotomes (44.9 ± 27.8 vs. 73.7 ± 44.6 and 130.1 ± 71.4 degrees, respectively; P < 0.001). The newly designed r-sphincterotome rotated smoothly and consistently at a constant speed, mirroring the input rotation.

Conclusions We evaluated the feasibility of the newly designed r-sphincterotome using an experimental model. We believe that the findings from these experiments may contribute to easier and more precise sphincterotomies.



Publication History

Received: 05 March 2024

Accepted after revision: 09 September 2024

Article published online:
28 November 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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