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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

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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.
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Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
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Updated: Dec 27, 2025

Discovering Middle Ear Anatomy by Transcanal Endoscopic Ear Surgery: A Dissection Manual
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Getting started in endoscopic ear surgery.

Peter Ryan1, Carolina Wuesthoff2, Nirmal Patel1,3,4

  • 1Department of Otolaryngology and Head and Neck Surgery, Royal North Shore Hospital, St Leonards, NSW, Australia.

Journal of Otology
|February 29, 2020
PubMed
Summary
This summary is machine-generated.

Endoscopic ear surgery (EES) offers a novel approach to otologic procedures, departing from traditional microscopic methods. This review introduces EES principles and learning theories for surgeons and residents.

Keywords:
EndoscopicEndoscopic Ear SurgeryOptical Chain

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Area of Science:

  • Otolaryngology
  • Surgical Innovation
  • Medical Technology

Background:

  • Traditional microscopic transcanal approaches are standard for middle ear and canal surgery.
  • Endoscopic ear surgery (EES) represents a significant technical and conceptual advancement.
  • EES has demonstrated positive patient outcomes.

Purpose of the Study:

  • To provide a foundational understanding of endoscopic ear surgery (EES).
  • To guide otologists and residents in adopting EES techniques.
  • To discuss the theoretical underpinnings of EES.

Main Methods:

  • Review of existing literature and surgical principles.
  • Explanation of the optical chain in endoscopic surgery.
  • Discussion of the learning curve and theoretical aspects of EES.

Main Results:

  • EES offers a distinct alternative to traditional microscopic otologic surgery.
  • Positive patient outcomes are associated with EES.
  • Understanding the optical principles and learning process is crucial for EES.

Conclusions:

  • Endoscopic ear surgery is an innovative and rapidly evolving field.
  • This review serves as an introductory guide for surgeons new to EES.
  • Mastery of EES requires understanding its unique principles and learning curve.