RESUMO
BACKGROUND: The Bluetooth wireless headset has been promoted as a 'hands-free' device with a low emission of electromagnetic radiation. OBJECTIVE: To evaluate potential changes in hearing function as a consequence of using Bluetooth devices, by assessing changes in pure tone audiography and distortion production otoacoustic emissions. DESIGN: Prospective study. MATERIALS AND METHODS: Thirty adult volunteers were exposed to a Bluetooth headset device (1) on 'standby' setting for 6 hours and (2) at full power for 10 minutes. Post-exposure hearing was evaluated using pure tone audiography and distortion production otoacoustic emission testing. RESULTS: There were no statistically significant changes in hearing, as measured above, following either exposure type. CONCLUSION: Exposure to the electromagnetic field emitted by a Bluetooth headset, as described above, did not decrease hearing thresholds or alter distortion product otoacoustic emissions.
Assuntos
Telefone Celular , Campos Eletromagnéticos/efeitos adversos , Audição/efeitos da radiação , Tecnologia sem Fio , Adulto , Audiometria de Tons Puros , Limiar Auditivo/efeitos da radiação , Cóclea , Feminino , Perda Auditiva , Humanos , Masculino , Emissões Otoacústicas Espontâneas/fisiologia , Projetos Piloto , Estudos Prospectivos , Adulto JovemRESUMO
Basal cell carcinoma (BCC) is an indolent, slow-growing malignant skin tumour. Approximately 70% of the tumours occur in the head and neck region. The nose is a common site for malignant skin tumours, such as basal cell carcinoma and squamous cell carcinoma because it is exposed to the sun. Excision of the BCC will leave the nose with a soft tissue defect which requires reconstruction. This report illustrates a case of BCC of nose whereby a wide excision and reconstruction was performed with a paramedian forehead flap.
