RONALDO FRIZZARINI
Projetos de Pesquisa
Unidades Organizacionais
7 resultados
Resultados de Busca
Agora exibindo 1 - 7 de 7
- Small cell lung carcinoma metastasis to palatine tonsils(2013) ARROYO, Helena Hotz; TAKEHARA, Jefferson; OGAWA, Allex Itar; FRIZZARINI, Ronaldo; IMAMURA, Rui; PAULA, Henrique Moura de
bookPart Estridor laríngeo(2018) OGAWA, Allex Itar; FRIZZARINI, RonaldobookPart Abscessos cervicais(2019) D´ÁVILA, Daniel Vasconcelos; FRIZZARINI, Ronaldo; IMAMURA, Rui- Individually Customized Implants for Laryngoplasty-Are They Possible?(2012) FRIZZARINI, Ronaldo; GEBRIM, Eloisa M. M. S.; IMAMURA, Rui; TSUJI, Domingos H.; MOYSES, Raquel A.; SENNES, Luiz U.Objective. To standardize the design of individually fitted implants based on computed tomographic (CT) images for use in medialization laryngoplasty without intraoperative voice monitoring. Study Design. Prospective tomographic and anatomical experimental study of 10 human cadaveric larynges. Methods. CT scans of 10 excised human larynges were analyzed to define the shape and size of ideal implants for medialization laryngoplasty. Silicone implants were designed according to CT parameters and used in simulated laryngoplasties in the laryngeal specimens. The efficacy of each implant in providing adequate medialization of the vocal fold was evaluated. Results. Diverse shapes and sizes of implants were obtained, reflecting variations in laryngeal anatomy. The implants enabled regular medialization of the entire extent of the free border of the vocal fold, including its posterior aspect. Medialization was considered adequate in all cases. Conclusions. This method proved to be a simple and efficient way to design individualized implants for medialization laryngoplasty, regardless of the size and shape of the larynx.
bookPart Trauma laríngeo(2018) FRIZZARINI, Ronaldo; OLIVEIRA, Saulo Lima de- Fundamental Frequency in Excised Human Larynges after Anterior Glottic Web Formation of Various Extents(2019) PINHEIRO, Thais Goncalves; ISHIKAWA, Camila Cristina; IMAMURA, Rui; FRIZZARINI, Ronaldo; MONTAGNOLI, Arlindo Neto; TSUJI, Domingos HiroshiObjective To determine the effect of vocal fold anterior web formation on fundamental frequency with a cadaveric excised larynx model. Study Design Experimental study with excised human larynges. Setting Academic tertiary care hospital. Subjects and Methods Sixteen freshly excised human larynges were evaluated with high-speed videoendoscopy and digital kymography during artificially produced vibration. Each larynx was assessed in 4 conditions: preoperative controls and after 25%, 33%, and 50% decreases in the vibratory portion of the vocal folds. The following parameters were evaluated: fundamental frequency, periodicity, vocal fold vibration amplitude, phase symmetry, and glottic closure. Results The mean fundamental frequencies were 208.87, 250.20, 292.37, and 342.67 Hz for preoperative controls and 25%, 33%, and 50% reductions in vibratory length of the vocal folds, respectively. Fundamental frequency increased with each increase in anterior glottic web extent, and the difference among the groups was statistically significant in absolute values in hertz and in semitone elevation. The mathematical models for estimating postoperative fundamental frequency had a statistically significant coefficient. The vibration of the vocal folds remained periodic in all larynges before and after the procedures. Conclusion There was a significant and progressive increase in the fundamental frequency with each enlargement of anterior glottic web. Based on the control frequency, mathematical models could estimate the value of the fundamental frequency after the procedure.
- Congenital laryngeal saccular cyst(2012) SENNES, Luiz Ubirajara; IMAMURA, Rui; FRIZZARINI, Ronaldo; HACHIYA, Adriana; CHAGURY, Azis Arruda