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Related Concept Videos

Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

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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:
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Endoscopic Procedures III: Video Capsule Endoscopy01:28

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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,...
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

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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.
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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...
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Endoscopic Procedures II: Colonoscopy01:25

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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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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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Endoscopic Procedures V: ERCP01:26

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Endoscopic Retrograde Cholangiopancreatography (ERCP) is a diagnostic procedure that combines endoscopy and fluoroscopy to diagnose and treat conditions related to the bile ducts, pancreatic ducts, and gallbladder. This procedure is beneficial for identifying and addressing blockages, gallstones, strictures, and tumors within the biliary or pancreatic systems. ERCP is both diagnostic and therapeutic, offering the ability to visualize and treat identified problems in one session.
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Related Experiment Video

Updated: Jan 14, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
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Upper gastrointestinal endoscopy: evolving classification tools.

Ramin Rezaeinasab1, Mehrsa Askari1, Saleheh Khorasani1

  • 1Student Research Committee, Alborz University of Medical Sciences, Karaj, Iran.

Gastroenterology and Hepatology From Bed to Bench
|October 21, 2025
PubMed
Summary

Standardized gastrointestinal (GI) endoscopy classification systems improve diagnostic accuracy and clinical decision-making for digestive diseases. Continued refinement and education are key to enhancing consistency and patient outcomes in endoscopic evaluations.

Keywords:
Classification systemUpper gastrointestinal diseasesUpper gastrointestinal tract endoscopy

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Area of Science:

  • Gastroenterology and Endoscopy
  • Medical Informatics

Background:

  • Gastrointestinal (GI) endoscopy is crucial for diagnosing and managing digestive diseases.
  • Standardized classification systems enhance consistency, accuracy, and clinical decision-making in endoscopic evaluations.

Purpose of the Study:

  • To review key GI endoscopy classification systems, their applications, and implementation challenges.
  • To highlight advancements and future directions in endoscopic classification.

Main Methods:

  • Comprehensive literature search across major databases (PubMed, Scopus, etc.).
  • Categorization of upper GI endoscopy classifications by anatomical region and adverse event reporting.
  • Utilized AI tools for refining criteria and developed a visual representation of classifications.

Main Results:

  • Reviewed major systems: Los Angeles (reflux esophagitis), Prague (Barrett's esophagus), Forrest (peptic ulcer disease), and AGREE (adverse events).
  • Advances in high-definition and narrow-band imaging (NBI) improve classification precision.
  • Identified challenges including system complexity and need for endoscopist education.

Conclusions:

  • Endoscopic classification systems are vital for standardizing GI disease assessment, improving diagnosis, treatment, and communication.
  • Continued refinement and integration into practice will enhance utility and patient outcomes.