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High-speed digital imaging laryngoscopy of the neoglottis following supracricoid laryngectomy with cricohyoidoepiglottopexy

Published online by Cambridge University Press:  24 May 2010

S Hayashi*
Affiliation:
Department of Otorhinolaryngology, Kitasato University School of Medicine, Sagamihara, Japan
H Hirose
Affiliation:
Faculty of Medicine, University of Tokyo, Japan
N Tayama
Affiliation:
Department of Otorhinolaryngology, International Medical Center of Tokyo, Japan
H Imagawa
Affiliation:
Department of Otorhinolaryngology-Head and Neck Surgery, University of Tokyo, Japan
M Nakayama
Affiliation:
Department of Otorhinolaryngology, Kitasato University School of Medicine, Sagamihara, Japan
Y Seino
Affiliation:
Department of Otorhinolaryngology, Kitasato University School of Medicine, Sagamihara, Japan
M Okamoto
Affiliation:
Department of Otorhinolaryngology, Kitasato University School of Medicine, Sagamihara, Japan
M Kimura
Affiliation:
Department of Otorhinolaryngology, International Medical Center of Tokyo, Japan
T Nito
Affiliation:
Department of Otorhinolaryngology-Head and Neck Surgery, University of Tokyo, Japan
*
Address for correspondence: Dr Seiichi Hayashi, Department of Otorhinolaryngology, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan. Fax: +81 42 778 8441 E-mail: seiichih@kitasato-u.ac.jp

Abstract

Objectives:

This study aimed to analyse vocal performance and to investigate the nature of the neoglottal sound source in patients who had undergone supracricoid laryngectomy with cricohyoidoepiglottopexy, using a high-speed digital imaging system.

Methods:

High-speed digital imaging analysis of neoglottal kinetics was performed in two patients who had undergone supracricoid laryngectomy with cricohyoidoepiglottopexy; laryngotopography, inverse filtering analysis and multiline kymography were also undertaken.

Results:

In case one, laryngotopography demonstrated two vibrating areas: one matched with the primary (i.e. fundamental) frequency (75 Hz) and the other with the secondary frequency (150 Hz) at the neoglottis. In case two, laryngotopography showed two vibrating areas matched with the fundamental frequency (172 Hz) at the neoglottis. The interaction between the two areas was considered to be the sound source in both patients. The waveform of the estimated volume flow at the neoglottis, obtained by inverse filtering analysis, corresponded well to the neoglottal vibration patterns derived by multiline kymography. These findings indicated that the specific sites identified at the neoglottis by the present method were likely to be the sound source in each patient.

Conclusions:

High-speed digital imaging analysis is effective in locating the sites responsible for voice production in patients who have undergone supracricoid laryngectomy with cricohyoidoepiglottopexy. This is the first study to clearly identify the neoglottal sound source in such patients, using a high-speed digital imaging system.

Information

Type
Clinical Records
Copyright
Copyright © JLO (1984) Limited 2010

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