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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...
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...
Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...

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A prospective international multisite randomized controlled trial of water exchange with and without distal cap(s) in adenoma detection.

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Related Experiment Video

Updated: May 9, 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

Water-aided colonoscopy.

Felix W Leung1

  • 1Division of Gastroenterology, Department of Medicine, Sepulveda Ambulatory Care Center, Veterans Affairs Greater Los Angeles Healthcare System, 111G, 16111 Plummer Street, North Hill, CA 91343, USA. felix.leung@va.gov

Gastroenterology Clinics of North America
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Water exchange colonoscopy, a novel technique, may improve adenoma detection and reduce patient discomfort compared to water immersion. This method facilitates easier insertion and withdrawal during the procedure.

Keywords:
Adenoma detection rateColonoscopyDiscomfortPainWater exchangeWater immersionWater-aided method

More Related Videos

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

Published on: July 11, 2025

Related Experiment Videos

Last Updated: May 9, 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

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

Area of Science:

  • Gastroenterology
  • Endoscopic procedures

Background:

  • Water-aided colonoscopy techniques aim to improve patient comfort and procedural efficiency.
  • Water immersion and water exchange are two such methods, with water exchange being a recent modification.

Purpose of the Study:

  • To compare the efficacy and patient experience of water exchange versus water immersion colonoscopy.
  • To evaluate the impact of these water-aided methods on adenoma detection rates.

Main Methods:

  • Review of aggregate data from randomized controlled trials comparing water exchange and water immersion colonoscopy.
  • Analysis of procedural outcomes, including patient discomfort and adenoma detection rates, particularly in the proximal colon.

Main Results:

  • Water exchange involves removing infused water predominantly during insertion.
  • A higher adenoma detection rate has been reported with water exchange compared to water immersion.
  • Aggregate data suggest water exchange may be superior in reducing colonoscopy discomfort and optimizing adenoma detection.

Conclusions:

  • Water exchange colonoscopy shows potential superiority over water immersion for patient comfort and adenoma detection.
  • This technique may be particularly beneficial for optimizing adenoma detection in the proximal colon.