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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:
Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
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...
Inflammatory Bowel Disease V: Surgical Management01:21

Inflammatory Bowel Disease V: Surgical Management

Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
Here are some common surgical interventions for IBD:
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...
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy01:30

Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy

Various diagnostic tests are employed in the diagnostic process for Inflammatory Bowel Disease (IBD), particularly to differentiate between Crohn's disease and ulcerative colitis.
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A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the colonic...

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Related Experiment Video

Updated: May 14, 2026

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

Repeat colonoscopy's value in gastrointestinal bleeding.

Parit Mekaroonkamol1, Kimberly Jegel Chaput, Young Kwang Chae

  • 1Parit Mekaroonkamol, Kimberly Jegel Chaput, Pojnicha Mekaroonkamol, Sherry Pomerantz, Department of Internal Medicine, Albert Einstein Medical Center, Philadelphia, PA 19141, United States.

World Journal of Gastrointestinal Endoscopy
|February 21, 2013
PubMed
Summary
This summary is machine-generated.

Repeating colonoscopies for lower gastrointestinal bleeding can be valuable, particularly within the first year. Early repeat procedures may reveal new findings that alter patient management, especially for bleeding indications.

Keywords:
Colonic diseaseColonoscopyDiagnostic yieldLower gastrointestinal hemorrhageRecurrent hemorrhage

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Investigating Intestinal Inflammation in DSS-induced Model of IBD
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Investigating Intestinal Inflammation in DSS-induced Model of IBD

Published on: February 1, 2012

Related Experiment Videos

Last Updated: May 14, 2026

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

Investigating Intestinal Inflammation in DSS-induced Model of IBD
08:43

Investigating Intestinal Inflammation in DSS-induced Model of IBD

Published on: February 1, 2012

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Diagnostic Yield

Background:

  • Repeat colonoscopies are performed for various indications.
  • The diagnostic yield of early repeat colonoscopies, excluding colorectal cancer (CRC) screening, requires further assessment.

Purpose of the Study:

  • To evaluate the diagnostic yield and clinical significance of early repeat colonoscopies.
  • To identify indications and time intervals associated with clinically valuable findings from repeat colonoscopies.

Main Methods:

  • Retrospective review of patients undergoing repeat colonoscopies within three years for the same indication.
  • Exclusion of repeat procedures for CRC screening, poor preparation, or complications.
  • Analysis of new endoscopic findings leading to therapeutic intervention or management change.

Main Results:

  • Of 139 eligible repeat colonoscopies, 20.33% for lower GI bleeding and 28.57% for abdominal pain yielded new findings impacting management.
  • Repeat colonoscopies for recurrent lower GI bleeding identified previously undetected hemorrhoids, actively bleeding lesions, adenomas, radiation colitis, rectal ulcers, and one colon cancer.
  • A repeat interval of less than one year was significantly associated with a higher likelihood of clinically significant findings.

Conclusions:

  • Early repeat colonoscopy demonstrates clinical value for recurrent lower gastrointestinal bleeding.
  • Performing repeat colonoscopies within the first year after the index procedure increases the chance of detecting significant findings.