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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 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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Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

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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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Factors Affecting the Risk of Infection01:26

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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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.
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In gastric emptying studies, a meal's liquid and...
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Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
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Related Experiment Video

Updated: Apr 18, 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

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Predictive factors for colonoscopy complications.

Annie O O Chan1, Louis N W Lee2, Angus C W Chan2

  • 1Gastroenterology & Hepatology Centre, Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong.

Hong Kong Medical Journal = Xianggang Yi Xue Za Zhi
|January 31, 2015
PubMed
Summary
This summary is machine-generated.

Inadequate bowel preparation and incomplete colonoscopy significantly increase the risk of immediate colonoscopy complications. Monitoring these factors is crucial for patient safety during the procedure.

Keywords:
Colonoscopy/adverse effectsPredictive value of tests

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E-Patient Counseling Trial E-PACO: Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
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E-Patient Counseling Trial E-PACO: Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
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Area of Science:

  • Gastroenterology
  • Clinical Research
  • Patient Safety

Background:

  • Colonoscopy is a common endoscopic procedure for diagnosing and treating colorectal diseases.
  • Complications, though rare, can occur and impact patient outcomes.
  • Identifying predictive factors for complications is essential for improving colonoscopy safety.

Purpose of the Study:

  • To identify factors that predict immediate and delayed complications associated with colonoscopy.
  • To assess the incidence and nature of colonoscopy-related complications.

Main Methods:

  • A prospective cohort study was conducted at a private hospital in Hong Kong.
  • 6196 patients undergoing colonoscopy were enrolled between June 2011 and May 2012.
  • Logistic regression analysis was used to determine predictors of immediate and systemic complications.

Main Results:

  • The incidence of immediate complications was 15.3 per 1000 procedures, with inadequate bowel preparation and incomplete colonoscopy being significant risk factors.
  • Female gender and monitored anesthetic care also predicted immediate complications.
  • Delayed complications occurred at a rate of 1.6 per 1000 procedures, primarily post-polypectomy bleeds.

Conclusions:

  • Inadequate bowel preparation and incomplete colonoscopy are key factors increasing the risk of colonoscopy-related complications.
  • Colonoscopy-related complications occurred with similar frequency to systemic complications, highlighting the need for careful monitoring.
  • These findings emphasize the importance of optimizing bowel preparation and ensuring complete colonoscopies to minimize risks.