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Related Concept Videos

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:
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
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 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 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 Studies I: Bronchoscopy and Thoracoscopy01:30

Endoscopic Studies I: Bronchoscopy and Thoracoscopy

Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
Bronchoscopy
Description
Bronchoscopy is a procedure that involves direct visualization of the larynx, trachea, and bronchi for diagnostic and therapeutic purposes. A flexible fiber optic or rigid bronchoscope is used to carry out the procedure. The fiber-optic bronchoscope is more frequently used due to...

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Related Experiment Video

Updated: May 29, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
03:43

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists

Published on: July 11, 2025

Colonoscopy: basic principles and novel techniques.

Yark Hazewinkel1, Evelien Dekker

  • 1Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, PO Box 22700, Meibergdreef 9, Amsterdam, 1105 AZ, The Netherlands.

Nature Reviews. Gastroenterology & Hepatology
|September 7, 2011
PubMed
Summary
This summary is machine-generated.

Improving colonoscopy quality involves optimizing bowel prep with split-dosing and ensuring high cecal intubation rates. Monitoring adenoma detection rates and employing techniques like chromoendoscopy enhance colorectal cancer prevention.

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Clinical Application of Single-Surgeon, Three-Port, Laparoscopic Resection for Colorectal Cancer with Natural Orifice Specimen Extraction
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Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
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Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

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Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
15:49

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Published on: October 16, 2013

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Colorectal Cancer Screening

Background:

  • Colonoscopy is the gold standard for colorectal cancer (CRC) detection and removal of precancerous lesions.
  • Current data indicate lower protection against right-sided CRC compared to left-sided CRC.
  • Continuous improvement of colonoscopy effectiveness relies on defined quality indicators.

Purpose of the Study:

  • To review standard and novel colonoscopy techniques.
  • To assess the impact of these techniques on key quality indicators.
  • To identify areas for quality improvement in colonoscopy practice.

Main Methods:

  • Review of existing literature on colonoscopy quality indicators.
  • Analysis of techniques impacting bowel preparation, cecal intubation, and adenoma detection.
  • Evaluation of advanced imaging and polypectomy techniques.

Main Results:

  • Split-dose bowel preparation regimens are superior to single-dose.
  • High cecal intubation rates (approx. 95%) are achievable with proper technique and devices.
  • Adenoma detection rates should exceed 25% in men and 15% in women, improved by optimal withdrawal and inspection time.
  • Chromoendoscopy is the only advanced imaging technique proven to enhance adenoma detection.

Conclusions:

  • Optimizing bowel preparation, cecal intubation, and adenoma detection rates are crucial for improving colonoscopy effectiveness.
  • Advanced techniques like chromoendoscopy and meticulous polypectomy contribute to better patient outcomes.
  • Adherence to quality indicators is essential for reducing colorectal cancer incidence and mortality.