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Updated: Aug 8, 2026

Using the Endoscope for Endobronchial Ultrasound in the Esophagus
Published on: November 21, 2023
Unsedated small-caliber upper endoscopy: an emerging diagnostic and therapeutic technology
Charles Y Kim1, Robert W O'Rourke, Eugene Y Chang
1Department of Surgery, Oregon Health and Science University, Portland Veteran's Administration Medical Center, Portland, Oregon 97207, USA.
Small-caliber endoscopy offers unsedated transnasal evaluation of the upper gastrointestinal tract, avoiding sedation-related complications. This technique expands procedural settings and applications for both diagnostic and therapeutic interventions.
Area of Science:
- Gastroenterology
- Endoscopy
Background:
- Conventional esophagogastroduodenoscopy requires patient sedation, leading to increased morbidity, work absence, and resource use.
- Sedation requirements limit the settings where upper gastrointestinal evaluations can be performed.
Purpose of the Study:
- To review the techniques, equipment, and applications of small-caliber endoscopy for upper gastrointestinal tract evaluation.
- To highlight the advantages of small-caliber endoscopy over conventional methods, particularly in unsedated patients.
Main Methods:
- Review of existing literature and clinical practices regarding small-caliber endoscopy.
- Discussion of transnasal endoscopy techniques and available equipment.
- Exploration of diagnostic and therapeutic applications.
Main Results:
- Small-caliber endoscopy allows for unsedated transnasal evaluation of the upper GI tract.
- The procedure can be performed in various settings, including clinic and office environments.
- Applications range from general diagnostics to specific interventions like feeding tube placement and dilation.
Conclusions:
- Small-caliber endoscopy provides a viable alternative to conventional endoscopy, especially for unsedated procedures.
- Its versatility enhances accessibility and efficiency in upper gastrointestinal diagnostics and therapeutics.
- Further integration into clinical practice is supported by its benefits.
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