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Related Concept Videos

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 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:
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...
Lower GI Series: Barium Enema01:23

Lower GI Series: Barium Enema

A Barium Enema, or a lower GI series, is a specialized radiographic examination designed to visualize the lower gastrointestinal tract, specifically the colon and rectum. This procedure is instrumental in diagnosing various conditions such as colorectal cancer, polyps, diverticulosis, and inflammatory bowel disease.
Procedure Details
The examination begins by inserting a lubricated rectal tube into the patient's rectum to administer a radiopaque barium solution. The barium flow is carefully...
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:

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Related Experiment Video

Updated: Jun 2, 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

[Surveillance colonoscopy before scheduled: is it worthwhile?].

Daniel G Cimmino1, Lisandro Pereyra, Pablo Luna

  • 1Servicio de Endoscopia Digestiva, Hospital Alemán, Buenos Aires, Argentina.

Acta Gastroenterologica Latinoamericana
|May 5, 2011
PubMed
Summary

Colonoscopies performed less than a year apart found incident polyps linked to procedural difficulties. Over three years, a history of polyps also predicted new polyp detection during surveillance colonoscopies.

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E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
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E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy

Published on: August 1, 2019

Related Experiment Videos

Last Updated: Jun 2, 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

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
06:28

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy

Published on: August 1, 2019

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Oncology

Context:

  • Colonoscopy is crucial for colorectal cancer screening and surveillance.
  • Understanding polyp recurrence and incidence is vital for optimizing surveillance intervals.
  • Previous studies have focused on long-term recurrence, but short-term incidence requires further investigation.

Purpose:

  • To determine the incidence of colonic polyps detected in surveillance colonoscopies performed earlier than scheduled.
  • To identify clinical and endoscopic predictors of polyp detection in early surveillance colonoscopies.

Summary:

  • A retrospective analysis of 378 paired colonoscopies revealed polyp incidence rates of 19% (adenomas) and 1.5% (high-grade dysplasia) within one year, and 21% (adenomas) and 2% (high-grade dysplasia) within three years.
  • In the first year, fair bowel preparation and prolonged colonoscopy duration were predictors of polyp detection.
  • At three years, fair bowel preparation, a history of sessile polyps, and the presence of 3 or more polyps in the initial colonoscopy predicted polyp detection.

Impact:

  • Findings suggest that procedural factors, like bowel preparation quality and procedure length, may contribute to missed polyps or rapid polyp growth within the first year.
  • A history of polyps is a significant predictor for future polyp detection, reinforcing its importance in risk stratification.
  • This study aids in refining colonoscopy surveillance protocols and identifying high-risk individuals for earlier follow-up.