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目的：观察正常人视网膜中央动脉（centralretinalartery，CRA）血流动力学生理变化并建立CRA血流参数正常值。方法：彩色多普勒血流显像检查100例正常人CRA血流，测定收缩期血流速度（vmax）、舒张末期血流速度（vmin）、平均血流速度（Vmean）、搏动指数（PI）、阻力指数（RI）及S／D((vmax／（vmin）。结果；得到不同年龄正常人CRA血流参数，显示CRA血流速度（vmax、vmin及vean）随年龄增加而降低（P＜0．01、P＜0．01及P＜0．01），CRA平均血流速度（vmen）右眼大于左眼（P＜0.01），男性CRA血流PI、RI及S／D大于女性（均为P＜0．05）。结论：正常人CRA血流参数在不同年龄、不同性别及两眼间均有显著变化。
Objective: To observe the hemodynamic changes of central retinal central artery (CRA) in normal subjects and establish the normal CRA blood flow parameters. Methods: Color Doppler flow imaging was used to examine the CRA blood flow in 100 normal subjects. The vmax, vmin, Vmean, ), Resistance index (RI) and S / D (vmax / (vmin) .Results; CRA blood flow parameters of normal subjects of different ages were obtained, showing that CRA blood flow velocity (vmax, vmin and vean) decreased with age (P <0.01, P <0.01, P <0.01). The average right eye of vmen in CRA was larger than left eye (P <0.01) (All P <0.05) .Conclusion: The CRA blood flow parameters of normal people have significant changes in different ages, different genders and both eyes.