Usefulness of a newly developed endoscope for the observation of the posterior tracheal wall

Objective Videoendoscopic evaluation of swallowing is an objective swallowing function evaluation method used in dysphagia rehabilitation. However, it is anatomically difficult to detect the entry of foreign substances through the posterior tracheal wall using a conventional endoscope (CE). In this...

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Bibliographic Details
Published in:Laryngoscope investigative otolaryngology 2023-08, Vol.8 (4), p.963-969
Main Authors: Tamai, Tomoe, Yoshimi, Kanako, Nakagawa, Kazuharu, Yanagida, Ryosuke, Okumura, Takuma, Yamaguchi, Kohei, Ishii, Miki, Nagasawa, Yuki, Tohara, Haruka
Format: Article
Language:English
Subjects:
Dysphagia
Endoscopy
Epiglottis
Laryngology, Speech and Language Science
Larynx
Neuromuscular diseases
Original Research
Statistical analysis
swallowing disorders
trachea
videoendoscopy
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Summary:Objective Videoendoscopic evaluation of swallowing is an objective swallowing function evaluation method used in dysphagia rehabilitation. However, it is anatomically difficult to detect the entry of foreign substances through the posterior tracheal wall using a conventional endoscope (CE). In this study, we developed an endoscope that can observe the posterior tracheal wall and investigated its reliability and validity in healthy adults. Methods Twenty healthy adults were included. The trachea was observed from inside the larynx using a CE and a portable, flexible two‐step angulation endoscope (two‐AE) with a two‐step curved shaft tip. The visibility of the anterior and posterior walls was recorded. The time from the endoscope tip entering the larynx to the posterior tracheal wall was measured. Additionally, discomfort events were assessed after the examination. McNemar's test and a paired t‐test were used for statistical analysis. Kappa coefficients and concordance rates were calculated. Results The anterior tracheal wall was observed using both endoscopes. The posterior tracheal wall was significantly observed in 18 participants with the two‐AE (p 
ISSN:2378-8038
2378-8038
DOI:10.1002/lio2.1105