Niwa Y, Yamamoto T, Kawakami H, Kitazawa Y
Department of Ophthalmology, Gifu University School of Medicine, Japan.
Jpn J Ophthalmol. 1998 Sep-Oct;42(5):389-92. doi: 10.1016/s0021-5155(98)00025-2.
The reproducibility of measurements by color Doppler imaging (CDI) were evaluated in Japanese patients with normal-tension glaucoma. Measurements were taken in the central retinal artery, the ophthalmic artery, and the short posterior ciliary arteries. Reproducibility was evaluated by calculating the coefficients of reproducibility for the peak systolic and end diastolic velocities and for the resistance index. The coefficient of reproducibility was calculated as magnitude of V1 - V2/¿(V1 + V2)/2¿ where V1 is the value of the first measurement and V2 is the value of the measurement taken 48 hours later. In calculating the resistance index of the orbital arteries, the central retinal artery and the short posterior ciliary artery temporal to the optic nerve both had coefficients of reproducibility of 0.04 +/- 0.04 (mean +/- standard deviation); the ophthalmic artery and the short posterior ciliary artery nasal to the optic nerve both had coefficients of reproducibility of 0.04 +/- 0.05. The high reproducibility of the CDI technique supports the validity of using CDI in a clinical setting to measure the hemodynamic parameters of small retrobulbar blood vessels.
在日本正常眼压性青光眼患者中评估了彩色多普勒成像（CDI）测量的可重复性。测量在视网膜中央动脉、眼动脉和睫状后短动脉进行。通过计算收缩期峰值速度、舒张末期速度和阻力指数的可重复性系数来评估可重复性。可重复性系数计算为|V1 - V2|/√[(V1 + V2)/2]²，其中V1是第一次测量的值，V2是48小时后测量的值。在计算眼眶动脉的阻力指数时，视网膜中央动脉和视神经颞侧的睫状后短动脉的可重复性系数均为0.04±0.04（平均值±标准差）；眼动脉和视神经鼻侧的睫状后短动脉的可重复性系数均为0.04±0.05。CDI技术的高可重复性支持在临床环境中使用CDI测量球后小血管血流动力学参数的有效性。
