Exploration of Multifocal Rod Electroretinograms Recording in Human

查看全文 作　　者：Changzheng Chen, Lezheng Wu, De-Zheng Wu, Shixian Long Jiongji Liang, Futian Jiang, Libing JiangZhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China

出　　处：《眼科学报》索引2002年第18卷第3期,共7页

摘　　要：Purpose:To test the feasibility of recording rod multifocal electroretinograms (ERG) in humans and observe appropriate recording conditions.Methods: Multifocal rod ERG were recorded using a stimulus array of 61 equalsized hexagons in two normal subjects after the dark adaptation. Flashes were blue (W47B). Blank frames between two successive flashes of hexagons varied from 0 to 14. Length of the m-sequence, bandwidth, flash frequency, flash intensities and background intensities were changed to obtain appropriate recording conditions for the clinical use.Results:Multifocal rod ERG were clearly recordable and well formed. They had an early implicit time, very small negative wave and a late implicit time, large positive wave. The positive wave was bimodal, whose timing and waveform were similar to the full-field rod ERG. The local response amplitudes can be suppressed with increase in flash frequency or background intensity, decrease in flash intensity or the size of stimulus elements.Conclusions: Multifocal rod ERG can be recorded in human and can provide topographical maps of retinal function that have clinical usage. 212-1 m-sequence length, 3F blank frames and 3~ 300 Hz bandwidth were suggested to appropriate recording conditions. 关键词：多源杆视网膜电图人体记录方法

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Exploration of Multifocal Rod Electroretinograms Recording in Human

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