Journal of Gastroenterology and Hepatology

Volume 34, Issue 1 pp. 194-201

Gastroenterology

Ex vivo assessment of anchoring force of covered biflanged metal stent and covered self-expandable metal stent for interventional endoscopic ultrasound

Ryosuke Tonozuka,

Ryosuke Tonozuka

orcid.org/0000-0003-3999-2847

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Shunji Yunoki,

Shunji Yunoki

Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan

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Takao Itoi,

Corresponding Author

Takao Itoi

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

Correspondence

Dr Takao Itoi, Department of Gastroenterology and Hepatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.

Email: [email protected]; [email protected]

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Atsushi Sofuni,

Atsushi Sofuni

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Takayoshi Tsuchiya,

Takayoshi Tsuchiya

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Kentaro Ishii,

Kentaro Ishii

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Reina Tanaka,

Reina Tanaka

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Mitsuyoshi Honjo,

Mitsuyoshi Honjo

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Shuntaro Mukai,

Shuntaro Mukai

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Mitsuru Fujita,

Mitsuru Fujita

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Kenjiro Yamamoto,

Kenjiro Yamamoto

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yasutsugu Asai,

Yasutsugu Asai

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yukitoshi Matsunami,

Yukitoshi Matsunami

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Takashi Kurosawa,

Takashi Kurosawa

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Hiroyuki Kojima,

Hiroyuki Kojima

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yuichi Nagakawa,

Yuichi Nagakawa

Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan

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Yoshiyasu Nagakawa,

Yoshiyasu Nagakawa

Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan

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Ryosuke Tonozuka,

Ryosuke Tonozuka

orcid.org/0000-0003-3999-2847

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Shunji Yunoki,

Shunji Yunoki

Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan

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Takao Itoi,

Corresponding Author

Takao Itoi

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

Correspondence

Dr Takao Itoi, Department of Gastroenterology and Hepatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.

Email: [email protected]; [email protected]

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Atsushi Sofuni,

Atsushi Sofuni

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Takayoshi Tsuchiya,

Takayoshi Tsuchiya

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Kentaro Ishii,

Kentaro Ishii

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Reina Tanaka,

Reina Tanaka

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Mitsuyoshi Honjo,

Mitsuyoshi Honjo

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Shuntaro Mukai,

Shuntaro Mukai

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Mitsuru Fujita,

Mitsuru Fujita

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Kenjiro Yamamoto,

Kenjiro Yamamoto

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yasutsugu Asai,

Yasutsugu Asai

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yukitoshi Matsunami,

Yukitoshi Matsunami

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Takashi Kurosawa,

Takashi Kurosawa

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Hiroyuki Kojima,

Hiroyuki Kojima

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

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Yuichi Nagakawa,

Yuichi Nagakawa

Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan

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Yoshiyasu Nagakawa,

Yoshiyasu Nagakawa

Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan

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First published: 05 June 2018

https://doi.org/10.1111/jgh.14307

Citations: 4

Disclosure statement: The following author discloses financial relationships relevant to this publication: Ryosuke Tonozuka gives remunerated lectures for Olympus Medical Systems. Takao Itoi provides remunerated lectures for Olympus Medical Systems and Boston Scientific Japan and is a consultant for Boston Scientific and MI Tech. The other authors have no disclosures relevant to this publication.

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Abstract

Background and Aims

Endoscopic ultrasound (EUS)-guided transmural drainage using a covered biflanged metal stent (CBFMS) and a conventional tubular biliary covered self-expandable metal stent (CSEMS) has recently been performed by EUS experts. However, appropriate traction force of the sheath to prevent the migration during stent deployment is well unknown. Herein, we assessed the anchoring force (AF) of the distal flange in CBFMSs and CSEMSs.

Methods

The AFs of four CBFMSs (Stents AX, NG, PL, and SX) and six CSEMSs (Stents BF, BP, EG, HN, SP, and WF) were compared in an ex vivo setting. We assessed the AF produced by each stent using an EUS-guided transmural drainage model and an EUS-guided hepaticogastrostomy model consisting of sheet-shaped specimens of the stomach, gelatin gel, and gelatin tubes.

Results

For CBFMSs, the maximum AF of Stent AX was significantly higher than those of Stents PL and SX (P < 0.05) in the porcine model. In the gelatin series, all stents except Stent NG showed a nearly similar AF. For CSEMSs, Stents HN, EG, BF, and WF showed gradual AF elevation in the porcine stomach. Stents SP and BP showed a lower AF than the other four stents. For the gelatin setting, the maximum AF of Stents HN, EG, and WF was higher than those of the other stents regardless of the type of specimens.

Conclusions

The significance of the AF and traction distance according to the property of various CBFMSs and CSEMSs could be elucidated using ex vivo models.

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Citing Literature

Volume34, Issue1

January 2019

Pages 194-201

Ex vivo assessment of anchoring force of covered biflanged metal stent and covered self-expandable metal stent for interventional endoscopic ultrasound

Abstract

Background and Aims

Methods

Results

Conclusions

References

Citing Literature

References

Information

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Ex vivo assessment of anchoring force of covered biflanged metal stent and covered self-expandable metal stent for interventional endoscopic ultrasound

Abstract

Background and Aims

Methods

Results

Conclusions

References

Citing Literature

References

Related

Information