Effects of stimulus intensity for electroretinogram in conscious miniature schnauzers
2008
Kim, H.A.(Seoul National Univ. (Korea R.)) | Jeong, M.B. | Yi, N.Y. | Park, S.A. | Kim, W.T. | Kim, S.E. | Chae, J.M. | Seo, K.M.
The aim of this study was to determine the most effective light intensity for flash electroretinogram (ERG) examination in conscious dogs using ERG equipment with a contact lens electrode with a built-in LED light source. ERG was performed on the bilateral eyes of ten clinically healthy miniature schnauzers at 6 different intensities (0.025, 0.079, 0.25, 0.79, 2.5 and 7.9 cd.s/square m) after dark adaptation for 20 min. With the increase in stimulus intensity, the most significant increase in a and b-wave amplitudes was observed at 2.5 cd.s/square m (p0.05). As the intensity of light was increased, the implicit times of both waves significantly decreased. Therefore, the most effective intensity of stimulus was 2.5 cd.s/square m in the conscious miniature schnauzers. This suggests that this procedure would be applicable for evaluation of retinal function in conscious dogs, especially in high-risk patients.
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