Pedro Coser

RESUMO Objetivo Propor um protocolo de investigação do equilíbrio corporal e determinar valores de referência para diferentes faixas etárias e gênero aplicando a metodologia da posturografia estática com provas dinâmicas em novo equipamento brasileiro de baixo custo para diagnóstico do equilíbrio. Método 297 voluntários hígidos, adultos, idosos e sem queixas vestibulares foram divididos em seis grupos, segundo faixa etária e gênero. Foram avaliados os limites de estabilidade e sete condições sensoriais (C1: olhos abertos, superfície estável; C2: olhos fechados, superfície estável; C3: olhos abertos, superfície instável; C4: olhos fechados, superfície instável; C5: estimulação optocinética para a direita, superfície instável; C6: estimulação optocinética para a esquerda, superfície instável; C7: estimulação túnel, superfície instável). O trabalho foi realizado com o equipamento Horus, fabricado pela empresa brasileira Contronic Sistemas Automáticos. Resultados Os valores de referênci...

OBJECTIVE to investigate the use of the iChirp stimulus in the infant's audiological diagnosis compared to stimuli typically used in the ABR in infants, in addition to suggesting reference values for the assessment of this population. METHODS 62 infants participated in the study, 29 females and 33 males. The subjects underwent the recording of the Auditory Brainstem Response in the Smart Ep equipment, with the stimuli click, iChirp-broadband, tone burst and iChirp-narrowband, which were presented at three levels of intensity (20 dB, 40 dB and 60 dB) and, for tone burst and iChirp-narrowband stimuli, at different frequencies (0.5, 1 k, 2 k and 4 KHz). The data were later analyzed using Student's t-test. RESULTS In general, the iChirp-broadband and iChirp-narrowband stimuli showed higher latency values and greater amplitudes when compared to click and tone burst stimuli. Furthermore, better signal-to-noise ratios were observed when contrasting iChirp-narrowband with tone burst. Additionally, reference values were established for the assessment of ABR in infants with the iChirp-broadband and iChirp-narrowband in the Smart-Ep equipment. CONCLUSION The iChirp stimulus appears to be promising in the infant's audiological diagnosis, as its use promoted greater amplitudes and better wave morphology, which facilitates to mark the waveforms and provides greater efficiency in the investigation of the auditory thresholds. The indication of normative data also enables the clinical use of these stimuli in the infant's audiological diagnosis.

The authors report two cases of malignant external otitis in infant boys, 5 and 6 months old respectively, caused by different etiologic agents (Pseudomonas aeruginosa and Proteus mirabilis). Both of them were in very poor general health, but neither ...

To establish reference intervals for cognitive potential P300 latency using tone burst stimuli. 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. Mean age of participants was 35 years. Average P300 latency was 305ms. 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. Estabelecer valores de referência para a latência do potencial cognitivo P300 com estímulos tone burst. Participaram do estudo 28 indivíduos entre 18 e 59 anos. O registro do P300 foi realizado no equipamento Masbe da marca Contronic. Os eletrodos foram fixados nas posições Fpz (eletrodo terra), Cz (eletrodo ativo), M1 e M2 (eletrodos referência). A intensidade foi de 80 dB NA. A frequência do estímulo frequente foi de 1.000Hz e a do estímulo raro de 2.000Hz. Os estímulos foram apresentados na forma binaural. A média de idade dos indivíduos foi de 35 anos. A média de latência para P300 de 305ms. Usando o protocolo descrito, o valor máximo de latência aceitáveis para P300 foram de 362,5ms (305 + 2DP 28,75) na faixa etária do adulto de 18 a 59 anos.

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. 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. 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. 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. 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.

... Autor(es): Pedro L. Coser*, Maristela J. Costa**, Maria JS Cóser***, Yotaka Fukuda****. ... 3.) - O jantar de sua mãe estava bom. 4.) - Esqueci de ir ao banco. 5.) - Ganhei um carro azul lindo. 6.) - Ela não está com muita pressa. 7.) - Avisei seu filho agora. ...

... Luciane S. Farias1, Ivone F. Toniolo2, Pedro L. Cóser3 ... habilidades como a atenção ea discriminação auditivas, cuja análise se realiza desde o receptor, as vias de transmissão, até as áreas corticais onde os impulsos são integrados (Luccas, Manzano, Ragazzo, 1983). ...

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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 <or= 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.

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O alcoolismo ou a dependência do álcool é uma doença crônica reconhecida pela Organização Mundial da Saúde (OMS). Consiste em um estado de intoxicação causado pelo consumo de álcool. Desenvolve-se em ritmos diferentes em cada pessoa, de acordo com suas ...