Kuze M, Uji Y
Department of Ophthalmology, Mie University School of Medicine, Tsu-shi, Japan.
Jpn J Ophthalmol. 2000 Jul-Aug;44(4):374-80. doi: 10.1016/s0021-5155(00)00177-5.
To determine the reliability of the Dawson, Trick, and Litzkow (DTL) electrode in electroretinographic recordings (ERG) in subjects of all ages, we evaluated ERG responses obtained with the contact lens (CL) and DTL electrodes and estimated a DTL/CL ratio for each sample.
Seventy-nine volunteers aged 2-84 years (79 normal eyes) were recruited for the study. Electroretinographic recordings elicited by monocular single-flash stimuli delivered by an automatic ERG recording system were recorded using both CL and the DTL electrodes (CL-ERG and DTL-ERG, respectively).
The relative amplitude of the DTL-ERG to the CL-ERG was 79.6-99.8% (mean = 93.4%) for the a-wave and 84.4-106.3% (mean = 92.3%) for the b-wave. The relative latency of the DTL-ERG to the CL-ERG was 86. 0-107.6% (mean = 98.2%) for the a-wave and 96.1-113.0% (mean = 97. 9%) for the b-wave. The a- and b-wave amplitudes differed significantly between DTL and CL electrodes only in the 40- to 49-year-old age groups (P <.05). Regression analysis indicated moderate to strong relationships between the electrodes for amplitude (a-wave, r = 0.690; b-wave, r = 0.824) and latency (a-wave, r = 0.667; b-wave, r = 0.725).
The DTL electrode has as high stability as the conventional CL electrodes for ERG recordings in most age groups.
为了确定道森、特里克和利茨科（DTL）电极在各年龄段受试者视网膜电图（ERG）记录中的可靠性，我们评估了使用隐形眼镜（CL）电极和DTL电极获得的ERG反应，并估算了每个样本的DTL/CL比率。
招募了79名年龄在2至84岁之间的志愿者（79只正常眼睛）参与该研究。使用自动ERG记录系统通过单眼单次闪光刺激诱发的视网膜电图记录，分别使用CL电极和DTL电极进行记录（分别为CL-ERG和DTL-ERG）。
DTL-ERG相对于CL-ERG的a波相对振幅为79.6%至99.8%（平均=93.4%），b波为84.4%至106.3%（平均=92.3%）。DTL-ERG相对于CL-ERG的a波相对潜伏期为86.0%至107.6%（平均=98.2%），b波为96.1%至113.0%（平均=97.9%）。仅在40至49岁年龄组中，DTL电极和CL电极之间的a波和b波振幅存在显著差异（P<.05）。回归分析表明，电极之间在振幅（a波，r=0.690；b波，r=0.824）和潜伏期（a波，r=0.667；b波，r=0.725）方面存在中度至强相关性。
在大多数年龄组中，DTL电极在ERG记录中具有与传统CL电极一样高的稳定性。
