DOMINGOS HIROSHI TSUJI
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Otorrinolaringologia e Oftalmologia, Faculdade de Medicina - Docente
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina
5 resultados
Resultados de Busca
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- Comparative Analysis of Vocal Fold Vibration Using High-Speed Videoendoscopy and Digital Kymography(2014) BARAVIEIRA, Paula Belini; BRASOLOTTO, Alcione Ghedini; HACHIYA, Adriana; TAKAHASHI-RAMOS, Marystella Tomoe; TSUJI, Domingos Hiroshi; MONTAGNOLI, Arlindo NetoObjectives. To compare high-speed videoendoscopy (HSV) and digital kymography (DKG) in the vocal fold vibration analysis of normophonic women with no vocal fold abnormalities. Study Design. Prospective study comparing quantitative parameters extracted by HSV and DKG. Methods. Eighteen normophonic women whose age ranged from 18 to 45 years participated in the study. The procedures comprised HSV and DKG of the medial line of the vocal folds. The parameters evaluated were fundamental frequency (F-0), open quotient (OQ), and duration of vibration cycle phases (open phase, closed phase, opening phase, and closing phase). Results. The F-0 results of HSV and DKG were similar. However, significant differences were found in both duration of vibration cycle phases and OQ, indicating a longer open phase in the vocal fold vibration when this phase was measured by HSV. Conclusions. The results emphasize the need to set up different normative threshold values for both HSV and DKG.
- The fascinating study of human vocal folds(2014) TSUJI, Domingos Hiroshi; WATANABE, Luciana Miwa Nita
- Cognitive Vocal Program applied to individuals with signals presbylarynx: preliminary results(2014) NEMR, Katia; SOUZA, Glaucia Verena Sampaio de; SIMÕES-ZENARI, Marcia; TSUJI, Domingos Hiroshi; HACHIYA, Adriana; CORDEIRO, Gislaine Ferro; NUNES, Guilherme Pecoraro; DAJER, María EugeniaPURPOSE: To propose and verify the feasibility of a vocal program intervention in patients with presbylarynx signs with or without vocal complaints. METHOD: Among 20 elder participants of the current research, 3 female patients with median age of 67 years were chosen for the pilot study. Laryngological examination, vocal recording with CAPE-V (Consensus Auditory-Perceptual Evaluation of Voice) protocol, and Screening Protocol of Risk of Dysphonia (SPRD) were conducted before and after the program intervention. They joined the Cognitive Vocal Program for presbyphonia based on the genetic epistemology by Jean Piaget associated with vocal techniques based on scientific literature. This program is structured with six sessions and each one of them is focused in different aspects of vocal production. RESULTS: After the program intervention, some aspects such as loudness, coordination between breathing and speaking, accuracy in articulatory movements, jitter, and harmonics-to-noise ratio improved with parameters within the expected range for the age group. Three female participants were observed for better vocal quality, higher fundamental frequency, and better maximum phonation time. In two cases, tension related to loudness elevation and better scores on SPRD was observed. Using by high-speed laryngeal image, we also observed reduction of presbylarynx signs, and remarkable improvement in glottis closure competence and mucosal wave movement of the patients with and without vocal complaints. CONCLUSION: The preliminary results suggest encouraging prospects for the proposal with improvement in the aspects analyzed. This program was well designed and did not require any further adjustments.
- Improvement of Vocal Pathologies Diagnosis Using High-Speed Videolaryngoscopy(2014) TSUJI, Domingos Hiroshi; HACHIYA, Adriana; DAJER, Maria Eugenia; ISHIKAWA, Camila Cristina; TAKAHASHI, Marystella Tomoe; MONTAGNOLI, Arlindo NetoIntroduction The study of the dynamic properties of vocal fold vibration is important for understanding the vocal production mechanism and the impact of organic and functional changes. The advent of high-speed videolaryngoscopy (HSV) has provided the possibility of seeing the real cycle of vocal fold vibration in detail through high sampling rate of successive frames and adequate spatial resolution. Objective To describe the technique, advantages, and limitations of using HSV and digital videokymography in the diagnosis of vocal pathologies. Methods We used HSV and digital videokymography to evaluate one normophonic individual and four patients with vocal fold pathologies (nodules, unilateral paralysis of the left vocal fold, intracordal cyst, and adductor spasmodic dysphonia). The vocal fold vibration parameters (glottic closure, vibrational symmetry, periodicity, mucosal wave, amplitude, and glottal cycle phases) were assessed. Results Differences in the vocal vibration parameters were observed and correlated with the pathophysiology. Conclusion HSV is the latest diagnostic tool in visual examination of vocal behavior and has considerable potential to refine our knowledge regarding the vocal fold vibration and voice production, as well as regarding the impact of pathologic conditions have on the mechanism of phonation.
- Graphical Evaluation of Vocal Fold Vibratory Patterns by High-Speed Videolaryngoscopy(2014) PINHEIRO, Alan P.; DAJER, Maria Eugenia; HACHIYA, Adriana; MONTAGNOLI, Arlindo N.; TSUJI, DomingosObjective. To characterize the voice and vocal fold function of an individual, it is essential to evaluate vocal fold vibration. The most widely used method for this purpose has been videolaryngoscopy. Methods. This article proposes a digital image processing algorithm to estimate the glottal area (ie, the space between the vocal folds) and produce graphs of the opening and closing phases of the glottal cycle. In eight subjects without voice disorders, vocal fold movements were recorded by high-speed videolaryngoscopy at 4000 frames per second. The video data were processed by a combination of image segmentation techniques that estimate the glottal area. The segmented area was used to construct the glottal waveform. Results. The graphs revealed important properties of vocal fold vibration, including amplitude, velocity, and other characteristics that have a major influence on voice quality. Conclusions. The combination of the high-speed technology with the proposed method improves the vocal fold analysis given a numerical feedback through graphical representation of the real vibratory patterns of the folds.