Harada Yosuke, Akita Tomoyuki, Takenaka Joji, Nakamura-Kadohiro Yuko, Tanaka Junko, Kiuchi Yoshiaki
Department of Ophthalmology and Visual Science, Graduate School of Biomedical Sciences.
Department of Epidemiology, Infectious Disease Control and Prevention, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Clin Ophthalmol. 2016 Aug 24;10:1617-22. doi: 10.2147/OPTH.S111250. eCollection 2016.
The aim of this study was to determine the reproducibility and reliability of optic disk evaluation in supine subjects with a Heidelberg Retina Tomograph II (HRT II).
One eye was randomly selected for evaluation by HRT II in each of eleven healthy subjects. Five images were obtained by each of two experienced operators at two separate visits with the subjects in both sitting and supine positions. A stand was constructed to allow stable, handheld operation of the HRT II head for imaging of the supine subjects. Measurements of optic disk parameters obtained in the supine position were compared with those obtained in the sitting position. The reliability of measurements in the supine position was evaluated by calculating both the coefficients of variation for measurements made by one observer on the first visit and the interobserver and intervisit intraclass correlation coefficients (ICCs); the values obtained were compared with those obtained for the sitting position.
Measurements of all parameters made in the supine position were highly similar to those made in the sitting position. The coefficients of variation obtained for each parameter in the sitting and supine positions ranged from 5.67% to 14.16% and from 2.18% to 16.08%, respectively. The interobserver ICC values in the sitting and supine positions were ≥0.978 and ≥0.989, respectively. The intervisit ICC values in the sitting and supine positions were ≥0.958 and ≥0.983, respectively.
Handheld operation of the HRT II in a custom-designed stand is feasible for optic disk evaluation in the supine subjects who were not able to maintain the sitting position.
本研究旨在确定使用海德堡视网膜断层扫描仪II（HRT II）对仰卧位受试者进行视盘评估的可重复性和可靠性。
随机选择11名健康受试者的一只眼睛，由HRT II进行评估。两名经验丰富的操作人员在两次单独的检查中，让受试者分别处于坐姿和仰卧位，各获取5张图像。搭建了一个支架，以便在对仰卧位受试者进行成像时，能稳定地手持HRT II头部进行操作。将仰卧位获得的视盘参数测量值与坐姿获得的测量值进行比较。通过计算一名观察者在首次检查时测量值的变异系数以及观察者间和检查间的组内相关系数（ICC），来评估仰卧位测量的可靠性；将获得的值与坐姿获得的值进行比较。
仰卧位所有参数的测量值与坐姿的测量值高度相似。坐姿和仰卧位各参数的变异系数分别为5.67%至14.16%和2.18%至16.08%。观察者间ICC值在坐姿和仰卧位分别≥0.978和≥0.989。检查间ICC值在坐姿和仰卧位分别≥0.958和≥0.983。
对于无法保持坐姿的仰卧位受试者，在定制设计的支架中手持操作HRT II对视盘进行评估是可行的。
