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目的通过了解老年糖尿病患者眼动脉和视网膜中央动脉的血流动力学变化为糖尿病视网膜病变提供参考。方法用线阵高频探头观察40例老年糖尿病患者和35例正常老年人眼动脉和视网膜中央动脉血流并测量其收缩期、舒张末期血流速度,阻力指数(RI)和搏动指数(PI)。结果糖尿病组收缩期与舒张末期血流速度低于正常对照组(P<0.01),而阻力指数和搏动指数高于对照组(P<0.01)。结论多普勒超声检查对评价老年糖尿病视网膜病变时眼底动脉血流的变化有着重要意义。
Objective To provide a reference for the diabetic retinopathy by understanding the hemodynamic changes of the ophthalmic artery and the central retinal artery in elderly diabetic patients. Methods The central arterial and peripheral retinal artery currents of 40 elderly diabetic patients and 35 normal elderly patients were observed with linear array high frequency probe. The systolic, end diastolic velocity, resistance index (RI) and pulsatility index (PI) were measured. . Results The systolic and diastolic blood flow velocities in diabetic group were lower than those in normal control group (P <0.01), but the resistance index and pulsatility index were higher in diabetic group than those in control group (P <0.01). Conclusion Doppler ultrasonography is of great significance in the evaluation of changes of fundus artery blood flow in senile diabetic retinopathy.