Related Experiment Video
Updated: Jun 6, 2026

Using the Endoscope for Endobronchial Ultrasound in the Esophagus
Published on: November 21, 2023
Observation of the esophagus, pharynx and lingual root by gastrointestinal endoscopy with a percutaneous retrograde
Michitaka Honda1, Yoshio Hori, Yoshiki Shionoya
1Michitaka Honda, Yoshio Hori, Yoshiki Shionoya, Akira Nakada, Toshihiko Sato, Takeshi Kobayashi, Hidenori Shimada, Naoki Kida, Tatsuo Nakamura, Department of Bioartifical Organs, Institute for Frontier Medical Science, Kyoto University, 53 Kawahara Cho, Sakyo-ku, Kyoto 606-8507, Japan.
Aim:
To evaluate the efficacy of retrograde observation of the esophagus, pharynx, larynx and lingual root.
Methods:
With the beagle dog under anesthesia, the anterior wall of the stomach was fixed on the abdominal wall in a similar way to percutaneous endoscopic gastrostomy. The gastrointestinal scope was inserted via a 12 mm laparoscopic port for subsequent retrograde observation from stomach to the oral cavity.
Results:
With this technique, direct observation of gastric cardia was possible without restriction. The cervical esophagus was dilated well, also allowing clear observation of the hypopharyngo-esophageal junction. If the tongue was manually pulled out forward, observation of the lingual root was possible.
Conclusion:
This procedure is easy and effective for pre-treatment evaluation of the feasibility of endoscopic resection in cases of superficial carcinoma of head and neck.
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