Pedro Luis Cóser
Universidade Federal de Santa Maria
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Revista Brasileira De Otorrinolaringologia | 2004
Luciane S. Farias; Ivone Maria Fagundes Toniolo; Pedro Luis Cóser
OBJETIVO: Esta pesquisa foi realizada com o objetivo de comparar os valores da latencia do P300 em criancas de 8 a 13 anos de idade, do sexo feminino e do sexo masculino, sem e com repetencia escolar. FORMA DE ESTUDO: Estudo clinico com coorte transversal. MATERIAL E METODO: Foram examinadas 60 criancas sem repetencia e 43 criancas com repetencia escolar. Todas as criancas foram submetidas a anamnese, audiometria tonal liminar, curva timpanometrica, reflexos auditivos contralaterais e o P300. RESULTADOS E CONCLUSOES: Ao final desta pesquisa, concluiu-se que as criancas do grupo sem repetencia escolar apresentaram valor da media aritmetica da latencia do P300 menor (332,25 ms), comparando-se ao grupo de criancas com repetencia escolar (413,23 ms). As criancas do sexo feminino sem repetencia escolar apresentaram valor da media aritmetica da latencia do P300 menor (328,37 ms), comparando-se as criancas do sexo masculino do mesmo grupo (337,68 ms). No grupo de criancas com repetencia escolar, as criancas do sexo feminino tambem apresentaram valor da media aritmetica da latencia do P300 menor (387,50 ms), comparando-se as criancas do sexo masculino (423,19 ms). Finalmente, observou-se que os valores das medias aritmeticas da latencia do P300 apresentaram-se menores nas criancas do sexo feminino (328,37 ms) e do sexo masculino (337,68 ms) sem repetencia escolar, comparando-se com os valores das medias aritmeticas da latencia do P300 nas criancas do sexo feminino (387,50 ms) e do sexo masculino (423,19 ms) com repetencia escolar.
Revista Brasileira De Otorrinolaringologia | 2010
Maria José Santos Cóser; Pedro Luis Cóser; Fleming Salvador Pedroso; Rafaele Rigon; Elenara Cioqueta
Auditory cortical disorders in the elderly can be assessed by the P300. The lack of contemporary reference values of P300 latency in healthy elderly motivated this study. AIM: To estimate the effect of age on P300 latency in a group of elderly. METHODS: We studied 62 elderly patients with pure tone thresholds up to 40 dB HL at the frequencies of 1000 and 2000 Hz, divided into groups according to age (60-64, 65-69 and 70-74 years). Were assessed by the P300 latency in response to the rare stimulus of 2000 Hz and 1000 Hz frequencies, both in the intensity of 80 dB HL. STUDY DESIGN: clinical, cross-sectional observational individual compared prospective. RESULTS: The latency in Group 60 was 337.26 ms (SD 11.31) in Group 65 was 351.86 ms (SD 29.05) and in Group 70 it was 370.19 ms (SD 23.40). The linear regression of the values of P300 latency showed an increase of 2.85 ms per year of age. The statistical analysis showed that the results were significant. CONCLUSION: The P300 latency increases with age at a rate of 2.85 ms per year between the ages of 60 and 74 years.
Revista Brasileira De Otorrinolaringologia | 2017
Michelle Cargnelutti; Pedro Luis Cóser; Eliara Pinto Vieira Biaggio
INTRODUCTION The chirp stimulus was developed seeking to counterbalance the delay of the sound wave on its journey through the cochlea, allowing the hair cells to depolarize at the same time. The result is a simultaneous stimulation providing better neural synchrony and, consequently, the recording of responses with greater amplitudes. OBJECTIVE To compare the absolute latency of waves I, III and V, the interpeak intervals I-III, III-V and I-V, amplitude values of wave V and its association with the amplitude of wave I, and the interaural difference V-V in the auditory brainstem response (ABR) using Click and LS CE-Chirp® stimuli to determine whether the responses evoked by LS CE-Chirp® could be applied to neuroaudiological diagnosis. METHODS Cross-sectional study with 30 normal-hearing individuals. The parameters used were: intensity of 85dBnHL, alternating polarity; 17.1 stimuli/s and 100-3000Hz filters. RESULTS The absolute latencies of waves I, III and V observed with LS CE-Chirp® and click did not show significant differences. Significantly higher amplitudes of wave V were observed with the LS CE-Chirp®. The interaural difference between the wave V latencies between stimuli showed no significant difference. CONCLUSION The LS CE-Chirp® stimulus was shown to be as efficient as the click to capture ABR at high levels of stimulation, with the advantage of producing greater-amplitude V waves.
Liver Transplantation | 2008
Maria Elena Fortes; Cláudio Augusto Marroni; Pedro Luis Cóser; Carlos Abaeté de los Santos
The aim of the study was to disclose a possible association of hearing defects with the use of either cyclosporin (CyA) or tacrolimus (FK‐506) in patients undergoing liver transplantation (LT). Pure‐tone audiometry (PTA) was performed in the same 42 patients before and after LT. Audiometric frequencies recorded ranged from 250 to 8000 Hz. Patients were divided into 2 groups according to the use of CyA (n = 18) or FK‐506 (n = 24). We used Kolmogorov‐Smirnov and subsequently Student t test, nonparametric Wilcoxon signed‐rank test, and Mann‐Whitney test for statistical analysis. Significance was achieved when P ≤ 0.05. There was a statistically significant change in PTA results, occurring as decreased hearing perception, especially in high frequencies (4000, 6000, and 8000 Hz), in both ears of patients undergoing LT and receiving FK‐506. Audiometric changes were not perceived pre‐ and posttransplantation in patients using CyA, except in the right ear, in the 3000‐Hz range. In conclusion, LT patients presented worsening of hearing patterns after undergoing transplantation. The defect was significantly more accentuated in the high‐frequency tones, particularly in individuals using FK‐506 as the immunosuppressive regimen. Liver Transpl, 2008.
Einstein (São Paulo) | 2016
Dayane Domeneghini Didoné; Michele Vargas Garcia; Sheila Jacques Oppitz; Thalisson Francisco Finamor da Silva; Sinéia Neujahr dos Santos; Rubia Soares Bruno; Valdete Alves Valentins dos Santos Filha; Pedro Luis Cóser
ABSTRACT Objective To establish reference intervals for cognitive potential P300 latency using tone burst stimuli. Methods This study involved 28 participants aged between 18 and 59 years. P300 recordings were performed using a two-channel device (Masbe, Contronic). Electrode placement was as follows: Fpz (ground electrode), Cz (active electrode), M1 and M2 (reference electrodes). Intensity corresponded to 80 dB HL and frequent and rare stimulus frequencies to 1,000Hz and 2,000Hz, respectively. Stimuli were delivered binaurally. Results Mean age of participants was 35 years. Average P300 latency was 305ms. Conclusion Maximum acceptable P300 latency values of 362.5ms (305 + 2SD 28.75) were determined for adults aged 18 to 59 years using the protocol described.
Arq. int. otorrinolaringol. (Impr.) | 2007
Maria José Santos Cóser; Elenara Cioquetta; Flemming Salvador Pedroso; Pedro Luis Cóser
Archive | 2016
Dayane Domeneghini Didoné; Michele Vargas Garcia; Sheila Jacques Oppitz; Thalisson Francisco; Finamôr da Silva; Sinéia Neujahr dos Santos; Rubia Soares Bruno; Valdete Alves; Valentins dos Santos Filha; Pedro Luis Cóser
International Archives of Otorhinolaryngology | 2014
Pedro Luis Cóser; Elenara Cioqueta; Rafaele Rigon; Thalisson Francisco Finamor da Silva; Valdete Alves Valentins dos Santos Filha
International Archives of Otorhinolaryngology | 2014
Pedro Luis Cóser; Elenara Cioqueta; Rafaele Rigon; Valdete Alves Valentins dos Santos Filha
International Archives of Otorhinolaryngology | 2014
Pedro Luis Cóser; Elenara Cioqueta; Rafaele Rigon; Valdete Alves Valentins dos Santos Filha
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Thalisson Francisco Finamor da Silva
Universidade Federal de Santa Maria
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