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Related Concept Videos

Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

325
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:
325
Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

275
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,...
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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

513
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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Inflammatory Bowel Disease V: Surgical Management01:21

Inflammatory Bowel Disease V: Surgical Management

294
Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
Here are some common surgical interventions for IBD:
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Related Experiment Video

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Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Tailoring Surveillance Colonoscopy in Patients With Advanced Adenomas.

Charles J Kahi1, Laura J Myers2, Timothy E Stump3

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Clinical Gastroenterology and Hepatology : the Official Clinical Practice Journal of the American Gastroenterological Association
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Patients with advanced adenomas (AAs) face uncertain surveillance benefits due to non-colorectal cancer (CRC) mortality risks. A new risk model identifies high-risk individuals unlikely to benefit from intensive follow-up.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Epidemiology

Background:

  • Intensive surveillance for advanced colorectal adenomas (AAs) is standard.
  • However, non-colorectal cancer (CRC) mortality risks may outweigh surveillance benefits, creating follow-up uncertainty.
  • Individualized follow-up strategies are needed.

Purpose of the Study:

  • To develop a risk prediction model and index for non-CRC cancer mortality (NCM) after AA diagnosis and removal.
  • To stratify NCM risk in patients with AAs.

Main Methods:

  • Retrospective cohort study of 2943 veterans (≥40 years) with AAs.
  • Logistic regression with lasso technique identified factors associated with 5-year NCM.
  • A risk index was constructed to estimate 5-year NCM risk.

Main Results:

  • Overall 5-year mortality was 16.7%, primarily from NCM (16.6%).
  • Independent predictors of NCM included age, comorbidity burden, specific conditions, and recent hospitalization.
  • A risk model demonstrated good fit (P=.41) and discrimination (c-statistic=0.74), with NCM rates of 6.5% (low risk), 14.1% (intermediate risk), and 33.2% (high risk).

Conclusions:

  • A validated risk prediction model identifies veterans with AAs at high risk of NCM within 5 years.
  • This model can help identify patients unlikely to benefit from intensive surveillance.
  • Risk stratification aids in personalizing follow-up care for AA patients.