title: Analysis of Direct Simultaneous Measurement of Glottal Airflow Velocity, Subglottal Pressure, and High-Speed Imaging Using Flexible Transnasal Endoscope in a Human Subject.
abstract: It is difficult to directly observe glottal airflow velocity just above the glottis due to sensor size requirements and limited accessibility. We developed a miniature hot-wire probe and flexible fiberscopic high-speed imaging system for human examinations. Simultaneous direct measurement of glottal airflow velocity, subglottal pressure, and vocal fold vibration was achieved in a patient who was treated with a T-tube for tracheal stenosis. Airflow velocity changes at the anterior midline of the vocal folds were synchronized with subglottal pressure changes during each phonation cycle. The velocity at the anterior midline of the vocal folds showed a rhythmic pattern of sharp, high peaks. The result of fast Fourier transform analysis indicated that glottal velocity at the anterior midline of the vocal folds had abundant high-frequency components that were not affected by resonance of the vocal tract. Airflow velocity was variable and diminished except at the anterior midline of the vocal folds.
authors.affiliation: Department of Adult and Elderly Nursing, School of Health Science, Tottori University Faculty of Medicine, Yonago 683-8503, Japan; †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kataoka
authors.affiliation: ‡Department of Information and Knowledge Engineering, Graduate School of Engineering, Tottori University, Tottori 680-8550, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Arii
authors.affiliation: †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Fukuhara
authors.affiliation: †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Kazunori
authors.initials: K
authors.lastname: Fujiwara
authors.affiliation: †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Yasuomi
authors.initials: Y
authors.lastname: Kunimoto
authors.affiliation: §Department of Otolaryngology-Head and Neck Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai 270-1694, Japan; †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Kensaku
authors.initials: K
authors.lastname: Hasegawa
authors.affiliation: †Division of Otolaryngology, Head and Neck Surgery, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Takeuchi
keywords: high-speed imaging; lottal velocity; subglottal pressure; transnasal endoscope