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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:
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...
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 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 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...

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Related Experiment Video

Updated: May 31, 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

Unsedated colonoscopy: is it feasible?

Felix W Leung1, Abdulrahman M Aljebreen

  • 1The Research and Medical Services, Sepulveda Ambulatory Care Center, CA, USA. felix.leung@va.gov

Saudi Journal of Gastroenterology : Official Journal of the Saudi Gastroenterology Association
|July 6, 2011
PubMed
Summary

Unsedated colonoscopy is feasible, with the water method reducing pain and improving success rates. This technique may revive unsedated colonoscopy as a viable option for colon cancer screening.

Related Experiment Videos

Last Updated: May 31, 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

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Preventive Medicine

Background:

  • Unsedated colonoscopy was initially feasible but faced challenges due to patient pain, leading to sedation use.
  • Sedation, while effective, created a barrier to widespread colonoscopy screening.
  • Recent advancements aim to overcome these limitations and improve patient experience.

Purpose of the Study:

  • To evaluate the feasibility and effectiveness of unsedated colonoscopy.
  • To assess the impact of the water method on patient comfort and procedural success.
  • To explore the potential of unsedated colonoscopy as a screening tool for colon cancer.

Main Methods:

  • Review of the evolution of unsedated colonoscopy techniques.
  • Analysis of randomized controlled trials evaluating the water method for unsedated colonoscopy.
  • Assessment of outcomes including patient pain, cecal intubation success, and completion rates.

Main Results:

  • The water method significantly decreases pain during unsedated colonoscopy.
  • It increases cecal intubation success and the proportion of patients completing the procedure.
  • The water method may also improve adenoma detection rates due to enhanced bowel preparation.

Conclusions:

  • Unsedated colonoscopy is a feasible procedure.
  • The water method represents a significant advancement, potentially reviving unsedated colonoscopy.
  • Further testing is warranted to confirm its role in colon cancer screening.