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Imai et al. Mini-invasive Surg 2024;8:2 Mini-invasive Surgery
DOI: 10.20517/2574-1225.2023.67

Original Article Open Access

Usefulness of capsule endoscopy for small

intestinal obstruction: a dual-center prospective
observational study

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Makoto Imai , Ryota Niikura 1,2 , Atsuo Yamada , Hirobumi Suzuki , Ayako Nakada , Yuzo Mitsuno ,
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Shinzo Yamamoto , Tomonori Aoki , Yoku Hayakawa , Takashi Kawai , Mitsuhiro Fujishiro 1
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Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 1138655, Japan.
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Gastroenterological Endoscopy, Tokyo Medical University, Tokyo 1600023, Japan.
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Department of Gastroenterology, Japanese Red Cross Medical Center, Tokyo 1508935, Japan.
Correspondence to: Dr. Ryota Niikura, Gastroenterological Endoscopy, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-
ku, Tokyo 1600023, Japan. E-mail: rniikuratritonocn@gmail.com
How to cite this article: Imai M, Niikura R, Yamada A, Suzuki H, Nakada A, Mitsuno Y, Yamamoto S, Aoki T, Hayakawa Y, Kawai
T, Fujishiro M. Usefulness of capsule endoscopy for small intestinal obstruction: a dual-center prospective observational study.
Mini-invasive Surg 2024;8:2. https://dx.doi.org/10.20517/2574-1225.2023.67
Received: 21 Jun 2023 First Decision: 13 Nov 2023 Revised: 12 Jan 2024 Accepted: 22 Jan 2024 Published: 29 Jan 2024
Academic Editor: Jean François Rey Copy Editor: Dong-Li Li Production Editor: Dong-Li Li
Abstract
Aim: To evaluate whether capsule endoscopy can identify causes of small intestinal obstruction and determine the
appropriate patient population for capsule endoscopy.

Methods: In this prospective observational study, we performed a tag-less patency capsule endoscopy for patients
with small intestinal obstruction. After confirming the patency of the small intestine, capsule endoscopy was
performed using Pill Cam SB2. The study endpoint was recurrence of small intestinal obstruction within 1 year.
Results: Of the 31 study patients, 8 were excluded. The remaining 23 patients, including 13 with a history of surgery
and 3 with band adhesions on contrast-enhanced CT, were analyzed. Subsequently, 18 of the 23 study patients
underwent tag-less patency capsule endoscopy to evaluate the small intestinal patency. Capsule endoscopy
revealed redness in six patients, erosions and ulcers in three patients, small intestinal diverticulum in one patient,
and tumor in one patient. One patient with Meckel’s diverticulum and another with small intestinal ganglioneuroma
underwent surgical resection. No recurrence of small intestinal obstruction was observed at 1 year.

Conclusion: This prospective observational study demonstrated that capsule endoscopy can determine the cause
of small intestinal obstruction after the obstruction is relieved.

Keywords: Small intestinal obstruction, patency capsule endoscopy, capsule endoscopy

© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0
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adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as
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