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Related Concept Videos

Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
During an EGD, the endoscope can be used to:
Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers, unexplained...
Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:

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Related Experiment Video

Updated: Jun 17, 2026

The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors
04:09

The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors

Published on: February 13, 2026

Balloon overtube-guided colorectal endoscopic submucosal dissection.

Tomohiko Ohya1, Ken Ohata, Kazuki Sumiyama

  • 1Department of Endoscopy, The Jikei University School of Medicine, 3-25-8 Nishi Shinbashi, Minato-ku, Tokyo 105-8461, Japan.

World Journal of Gastroenterology
|December 23, 2009
PubMed
Summary

A balloon overtube aids colorectal endoscopic submucosal dissection (ESD) by improving scope access and manipulation. This technique enhances lesion accessibility during the procedure.

Related Experiment Videos

Last Updated: Jun 17, 2026

The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors
04:09

The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors

Published on: February 13, 2026

Area of Science:

  • Gastroenterology
  • Endoscopic Surgery

Background:

  • Colorectal endoscopic submucosal dissection (ESD) is a minimally invasive technique for resecting gastrointestinal lesions.
  • Challenges in scope positioning and stabilization can complicate colorectal ESD procedures.

Purpose of the Study:

  • To assess the utility of a balloon overtube in facilitating colorectal ESD performed with a gastroscope.
  • To evaluate the impact of balloon-assisted technique on procedural outcomes.

Main Methods:

  • A retrospective analysis of 45 colorectal ESD cases was conducted.
  • Fifteen patients with preoperatively identified access difficulties were assigned to the balloon overtube-guided ESD group.
  • Standard ESD procedures were followed, with the balloon overtube used to enhance scope maneuverability.

Main Results:

  • The overall en bloc excision rate for colorectal ESD was 95.6%.
  • In the balloon overtube group, en bloc excision was achieved in 86.7% of patients.
  • Lesion accessibility and scope manipulation were improved with the balloon overtube, though not statistically significant compared to standard ESD.

Conclusions:

  • The use of a balloon overtube can improve lesion access during colorectal ESD.
  • This device facilitates better scope manipulation, potentially improving procedural feasibility.