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Related Experiment Video

Updated: May 30, 2026

Using the Endoscope for Endobronchial Ultrasound in the Esophagus

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Published on: November 21, 2023

Fine needle aspiration using forward-viewing endoscopic ultrasonography.

M Kida¹, M Araki, S Miyazawa

¹Department of Gastroenterology, Kitasato University East Hospital, 2-1-1 Asamizodai, Sagamihara, Kanagawa, Japan. m-kida@kitasato-u.ac.jp

|August 11, 2011

Summary

A new forward-viewing echo endoscope offers excellent diagnostic accuracy for endoscopic ultrasound-guided fine needle aspiration (EUS-FNA). This innovative device facilitates easier puncture of difficult-to-access lesions, improving therapeutic outcomes.

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Published on: May 23, 2015

Area of Science:

Gastroenterology
Medical Imaging
Surgical Instrumentation

Background:

A prototype forward-viewing instrument was developed for therapeutic endoscopic ultrasound (EUS)-guided fine needle aspiration (FNA).
The clinical utility of this novel forward-viewing echo endoscope was evaluated, primarily for diagnostic EUS-FNA procedures.

Purpose of the Study:

To assess the clinical usefulness of a prototype forward-viewing echo endoscope for diagnostic and therapeutic EUS-FNA.
To compare the diagnostic accuracy of the forward-viewing scope with a conventional oblique-viewing scope.

Main Methods:

The prototype forward-viewing echo endoscope was utilized in 47 consecutive patients over 15 months.
Diagnostic EUS-FNA was performed in 38 patients, with accuracy compared to matched reference patients using an oblique-viewing scope.
Therapeutic EUS procedures were conducted in nine patients.

Main Results:

Diagnostic EUS-FNA achieved 97.4% accuracy, comparable to the 94.7% accuracy of the oblique-viewing scope.
The forward-viewing scope facilitated easier puncture of challenging lesions, including those in the pancreatic head, fornix, and porta hepatis.
Therapeutic EUS procedures were successful in all nine patients, with no reported complications.

Conclusions:

The forward-viewing echo endoscope enables more perpendicular puncture of target sites with reduced effort.
This device is advantageous for diagnostic EUS-FNA, particularly for lesions in specific anatomical locations.
The forward-viewing scope demonstrates significant potential for both diagnostic and therapeutic EUS-guided interventions.