Navegando por Palavras-chave "emissões otoacústicas"
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- ItemAcesso aberto (Open Access)Efeito da acupuntura sobre as emissões otoacústicas de pacientes com zumbido(ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2007-10-01) Azevedo, Renata Frasson De [UNIFESP]; Chiari, Brasilia Maria [UNIFESP]; Okada, Daniel Mochida [UNIFESP]; Onishi, Ektor Tsuneo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)The treatment of tinnitus is still a challenge. Acupuncture is recommended for the relief of tinnitus in traditional Chinese Medicine, although scientific evidence is lacking. AIM: The aim of this study was to assess the effect of acupuncture on the cochlear function in patients with tinnitus by analyzing otoacoustic emissions. METHODS: Thirty eight patients with tinnitus were included in the prospective clinical study. Measures of transitory otoacoustic emissions and suppression of otoacoustic emissions were obtained from all subjects before and after acupuncture. Patients were assigned to one of two groups: intervention group 1 (n=19), in which needle acupuncture was applied at the temporoparietal point corresponding to the vestibulocochlear area, and intervention group 2 (n=19), in which the needle was applied 3cm cranially to this area (which is not a recognized acupuncture point). RESULTS:There was a significant difference between the amplitude of otoacoustic emissions assessed before and after acupuncture in intervention group 1. No difference was observed in intervention group 2. CONCLUSION: Acupuncture had a significant effect on otoacoustic emissions in patients with tinnitus.
- ItemAcesso aberto (Open Access)A eficiência das emissões otoacústicas transientes e audiometria tonal na detecção de mudanças temporárias nos limiares auditivos após exposição a níveis elevados de pressão sonora(ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2007-10-01) Barros, Samanta Marissane Da Silva; Frota, Silvana [UNIFESP]; Atherino, Ciríaco Cristovão Tavares; Osterne, Francisco [UNIFESP]; Universidade Veiga de Almeida; Universidade Federal de São Paulo (UNIFESP); UFRJ; UVA; Universidade de São Paulo (USP); UERJExposure to noise has a harmful effect on the auditory health of workers. AIM: The main goal of this paper was to establish the role of pure-tone audiometry and evoked transient otoacoustic emissions in the detection of small temporary auditory changes after exposure to high sound pressure levels. Study Design: a cross-sectional cohort study. MATERIAL AND METHODS: 30 otologically normal subjects aged between 20 and 35 years were submitted to pure-tone audiometry and evoked transiente otoacoustic emissions before and after 5 hours of exposure to high sound pressure levels (betweeen 80 and 90 dB). RESULTS: For pure-tone audiometry the largest changes occurred at high frequencies - from 3 KHz to 8 KHz after exposure. The evoked transient otoacoustic emissions showed reduced reproductibility from 1 KHz to 4 KHz after exposure to noise. CONCLUSION: We noted that both pure-tone audiometry and evoked transient otoacoustic emissions had a role in detecting statistically significant changes in the auditory threshold and in reproductibility, after exposure to high sound pressure levels.
- ItemAcesso aberto (Open Access)Emissões otoacústicas por produto de distorção e audiometria tonal liminar: estudo da mudança temporária do limiar(ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2002-05-13) Frota, Silvana [UNIFESP]; Iorio, Maria Cecilia Martinelli [UNIFESP]; UFRJ; Universidade Federal de São Paulo (UNIFESP)Introduction: Noise-induced hearing loss is one of the most common causes for sensorineural hearing impairment. Objective: The purpose of this study was to evaluate pure tone and distortion product otoacoustic emissions (DPOAE) pre and post white noise exposition at high levels (100 dB SPL for 10 minutes), considering gender and ear variables, aiming at investigating pure tone audiometry and DPOAE efficiency in detecting subtle temporary threshold shifts (TTS). Study design: prospectivo clinical randomized. Material and method: Forty subjects, 20 male and 20 female ranging from 18 to 36 years old with no otological complaints were evaluated. Pure tone audiometry and DPOAE were carried out pre and post white noise exposure. Results: Pure tone audiometry was sensitive in detecting temporary threshold shifts after white noise exposition in 2, 3 and 4 kHz, with no significant differences concerning gender and ear, whereas DPOAE revealed temporary shifts in audibility evidenced by amplitude reduction, in 2588 and 3614 in female subjects and in 932, 1304, 2588 and 5128 Hz in male subjects. Conclusion: We could conclude that either pure tone audiometry or DPOAE were sensitive in determining significant temporary shifts in hearing thresholds and amplitude, respectively, after white noise exposition, according to the involved frequency range
- ItemAcesso aberto (Open Access)Percepção auditiva em síndrome de Alport(ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2006-12-01) Viveiros, Carla Mherlyn [UNIFESP]; Pereira, Liliane Desgualdo [UNIFESP]; Mastroianni Kirsztajn, Gianna [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Alport s Syndrome is characterized by the presence of renal, hearing and visual disorders. Objective: To characterize the TOAE and the MOES activity (suppression effect) in individuals with Alport s Syndrome. MATERIAL AND METHOD: This is a prospective study of a sample included ten individuals with a diagnosis of Alport s Syndrome. MOES recording was made in the presence and absence of contralateral stimulation (CLS) stimulation using the computer software ILO 92 - Otodynamics. RESULTS: TOAE was present in the global response (A) and in frequency ranges of 1000, 1500, 2000 and 3000 Hz in 4 individuals (40%), and absent in 6 individuals (60%) with hearing loss. We observed no responses at 4000 Hz in the right and left ears. Individuals that presented global responses to TOAE also suppressed that response when there was noise. CONCLUSION: The suppression effect also occurs with TOAE, suggesting that the hearing loss is predominantly the result of cochlear dysfunction.