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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 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 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:
Stages of General Anesthesia01:22

Stages of General Anesthesia

Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...

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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

Is there a place for sedationless colonoscopy?

Felix W Leung1

  • 1Research and Medical Services, VA Sepulveda Ambulatory Care Center, Veterans Affairs Greater Los Angeles Healthcare System, North Hills, CA, USA; and David Geffen School of Medicine at University of California Los Angeles, Los Angeles, CA, USA.

Journal of Interventional Gastroenterology
|June 21, 2011
PubMed
Summary

Unsedated colonoscopy offers a viable alternative to sedation, reducing barriers to screening. A new water method improves comfort and cecal intubation rates for unsedated procedures.

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
  • Medical Procedures

Background:

  • Colonoscopy is a crucial screening tool, but sedation requirements present barriers in the US.
  • Sedation, while having minimal side effects, necessitates an escort and increases procedure time.
  • Deep sedation with propofol, though efficient for endoscopists, incurs significant costs.

Purpose of the Study:

  • To evaluate the feasibility and patient acceptance of unsedated colonoscopy.
  • To explore methods for improving patient comfort and procedural success in unsedated colonoscopy.
  • To address barriers to screening colonoscopy uptake in the US.

Main Methods:

  • Review of unsedated colonoscopy protocols, including "as needed" and "on demand" sedation options.
  • Assessment of benefits reported by experienced nurses regarding room turnover and recovery time.
  • Introduction and evaluation of a novel water method for colonoscopy, replacing air with warm water infusion and utilizing suction and water exchange for cleansing.

Main Results:

  • Unsedated colonoscopy is well-received by patients, with benefits including optimized discharge planning due to lack of amnesia.
  • The current success rate for cecal intubation in unsedated colonoscopy is limited to approximately 80% due to pain and discomfort.
  • The novel water method shows potential for decreasing procedural discomfort and enhancing cecal intubation rates in unsedated colonoscopy.

Conclusions:

  • Unsedated colonoscopy is a practical and patient-endorsed option that can overcome sedation-related barriers.
  • The new water infusion method holds promise for improving the success and comfort of unsedated colonoscopy.
  • Widespread adoption of unsedated colonoscopy, particularly with advanced techniques, could increase screening rates.