Normatização do eletrorretinograma por padrão alternado

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

The objective of this study is to standardize recordings of PattemElectroretinograms (PERG) in normal human subjects. The standartization followed the model proposed by the Intemational Organization of Eletroretinography and was specific for the laboratory of evoked potentials of the Department of Neurology, Faculty of Medical Sciences, State University of Campinas. Two types of stimuli were used, one of 30 minutes of arch of visual angle and other one of 60 minutes of arch of visual angle. In all patients a positive wave, defined internationally as P50, and negative called N95, were obtained without interferences. The normal range for latency, amplitude and duration of each wave was obtained. There were significative differences in amplitude, latency and duration of P50 and, N95 waves among the several age groups. There was an increase in latency and a decrease in amplitude with increasing age. No significative differences were found among the variables comparing different stimuli, sex or when eyes were compared with each other. The standardization of PERG give us reprodutibility of results and possibility of further comparative studies.

ASSUNTO(S)

olhos - diagnostico eletrofisiologia visão

ACESSO AO ARTIGO

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