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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:
196
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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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 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,...
339
Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

366
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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Endoscopic Procedures V: ERCP01:26

Endoscopic Procedures V: ERCP

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Endoscopic Retrograde Cholangiopancreatography (ERCP) is a diagnostic procedure that combines endoscopy and fluoroscopy to diagnose and treat conditions related to the bile ducts, pancreatic ducts, and gallbladder. This procedure is beneficial for identifying and addressing blockages, gallstones, strictures, and tumors within the biliary or pancreatic systems. ERCP is both diagnostic and therapeutic, offering the ability to visualize and treat identified problems in one session.
Patient...
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Related Experiment Video

Updated: Sep 21, 2025

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

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A single centre audit: repeat pre-operative colonoscopy.

Michelle Zhiyun Chen1, Hareshdeva Devan Nair1, Apoorva Saboo1

  • 1Colorectal Surgery Unit, Department of General Surgery, Northern Hospital, Melbourne, Victoria, Australia.

ANZ Journal of Surgery
|June 1, 2022
PubMed
Summary
This summary is machine-generated.

Repeat colonoscopies for colorectal cancer tumor localization are common, occurring in 28.6% of patients. Inadequate initial colonoscopy reporting and lesion tattooing significantly increase repeat procedures, delaying definitive operations.

Keywords:
colonoscopycolorectal cancer

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Area of Science:

  • Gastroenterology
  • Surgical Oncology
  • Clinical Audit

Background:

  • Repeat colonoscopy is often necessary for accurate tumor localization in colorectal cancer (CRC) management.
  • Assessing the quality of initial colonoscopies is crucial for optimizing CRC diagnosis and treatment pathways.

Purpose of the Study:

  • To evaluate the clinical utilization of repeat colonoscopies for CRC tumor localization.
  • To benchmark the quality of initial colonoscopies against standardized guidelines for tumor localization, tattooing, and reporting.

Main Methods:

  • A retrospective analysis of 339 patients who underwent elective colorectal cancer resection between 2016 and 2021.
  • Data on patient demographics, colonoscopic findings, and operative details were extracted from the Bi-National Colorectal Cancer Audit (BCCA) Registry and hospital records.

Main Results:

  • A repeat colonoscopy rate of 28.6% was observed, with no significant difference between surgeons (29.6%) and non-operating endoscopists (26.2%).
  • Localisation error rates were similar between the two groups (5.9% vs. 6.95%).
  • Repeat endoscopy was significantly associated with longer delays to definitive surgery (p < 0.001) and no complications were reported.

Conclusions:

  • No significant difference in localisation error or repeat colonoscopy rates exists between surgeons and non-operating endoscopists, potentially due to standardized training.
  • Lack of lesion tattooing and inadequate documentation during initial colonoscopy are key drivers for repeat procedures.
  • Implementing standardized guidelines for lesion tattooing and colonoscopy reporting is recommended to improve efficiency and reduce treatment delays.