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Related Concept Videos

Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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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:
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Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

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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,...
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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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...
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

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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...
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Lower GI Series: Barium Enema01:23

Lower GI Series: Barium Enema

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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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Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

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Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more...
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Related Experiment Video

Updated: Dec 19, 2025

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Optimal Colonoscopic Surveillance Interval After Normal Baseline Screening Colonoscopy.

Jian Dong1,2,3,4,5,6,7,8,9,10, Minman Wu1,2,3,4,5,6,7,8,9,10, Jiarong Miao1,2,3,4,5,6,7,8,9,10

  • 1Jian Dong, MD, PhD, The First Department of Medical Oncology, The Third Affiliated Hospital of Kunming Medical University, Tumor Hospital of Yunnan Province, Kunming, China.

Gastroenterology Nursing : the Official Journal of the Society of Gastroenterology Nurses and Associates
|June 4, 2020
PubMed
Summary

Determining the ideal colonoscopy screening interval is crucial. For individuals with normal baseline colonoscopies, the optimal surveillance interval is approximately 5 years, with age over 50 and male gender being key risk factors for adenoma.

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Area of Science:

  • Gastroenterology
  • Preventive Medicine
  • Oncology

Background:

  • The optimal colonoscopic surveillance interval for the Chinese population remains undetermined.
  • Current guidelines may lead to overuse or underuse of colonoscopy in surveillance settings.

Purpose of the Study:

  • To assess the optimal colonoscopic surveillance interval following a normal baseline screening colonoscopy.
  • To identify risk factors associated with adenoma development during surveillance.

Main Methods:

  • Retrospective study of 1,005 individuals with normal baseline colonoscopies and at least two follow-up examinations (2000-2013).
  • Analysis of adenoma detection rates, risk factors (age, gender), and surveillance intervals.

Main Results:

  • 169 individuals developed adenomas during surveillance.
  • Mean adenoma surveillance interval was 4.76 ± 2.89 years.
  • Age over 50 and male gender were identified as significant risk factors for adenoma detection.

Conclusions:

  • An optimal colonoscopic surveillance interval of approximately 5 years is recommended for individuals with normal baseline screening.
  • Age and male gender are critical factors influencing adenoma risk during surveillance.