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Related Concept Videos

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 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...
Upper GI Series: Barium Swallow01:24

Upper GI Series: Barium Swallow

The Barium Swallow Study, or a Barium Esophagogram, is a diagnostic imaging method used to visualize the upper gastrointestinal (GI) tract, including the esophagus, stomach, and small intestine. It employs barium sulfate, a radiopaque contrast material, to provide clear images of the upper digestive system, helping to identify abnormalities, diseases, or structural issues.
Purpose and Procedure
Patients undergoing this procedure ingest a liquid containing barium sulfate with a chalky...
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: May 21, 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

Immediate unprepared hydroflush colonoscopy for severe lower GI bleeding: a feasibility study.

Aparna Repaka1, Matthew R Atkinson, Ashley L Faulx

  • 1Division of Gastroenterology and Liver Disease, Digestive Health Institute, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, Ohio 44106, USA.

Gastrointestinal Endoscopy
|June 5, 2012
PubMed
Summary

Immediate unprepared hydroflush colonoscopy is a feasible technique for severe lower GI bleeding, enabling visualization without oral preparation. This method allows for effective assessment in critical patients.

Related Experiment Videos

Last Updated: May 21, 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

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Emergency Medicine

Background:

  • Severe lower GI bleeding often necessitates urgent colonoscopy.
  • Traditional colonoscopy prep is time-consuming and may be inadequate in critically ill patients.
  • Oral bowel preparation poses challenges in severe lower GI bleeding cases.

Purpose of the Study:

  • To assess the feasibility and safety of immediate unprepared hydroflush colonoscopy.
  • To evaluate the outcomes of this technique in severe lower GI bleeding patients.
  • To determine if hydroflush colonoscopy provides adequate visualization without oral preparation.

Main Methods:

  • Prospective feasibility study.
  • Immediate colonoscopy using tap-water enema and hydroflush technique (water-jet pumps, suction).
  • Performed on intensive care unit patients with severe lower GI bleeding.

Main Results:

  • Colonoscopy to the cecum achieved in 69.2% of patients.
  • Adequate visualization for bleeding source identification in all procedures.
  • Definite bleeding source identified in 38.5% of cases.
  • Median ICU stay: 1.5 days; hospital stay: 4.3 days.
  • Rebleeding rate: 25%.

Conclusions:

  • Immediate unprepared hydroflush colonoscopy is feasible for severe lower GI bleeding.
  • The hydroflush technique facilitates visualization without traditional bowel prep.
  • This approach is a viable option in selected critically ill patients.