目的:观察一定范围环扎带缩短率的孔源性视网膜脱离巩膜扣带术术前、术后眼血流动力学的改变。方法:采用彩色多普勒成像(CDI)对28例单眼视网膜脱离患者术前、术后的视网膜中央动脉(CRA)的收缩期峰值流速(Vmax)、舒张期末流速(Vmin)、平均血流速度(V),阻力指数(RI)、搏动指数(PI)进行测量,以对侧正常眼作对照。结果:术前患眼与对照眼的CRA各项指标比较,差异无统计学意义。术后14d视网膜脱离眼CRA的Vmax,Vmin均升高,RI,PI亦增高,与对照眼以及术前指标差异无统计学意义。结论:一定范围环扎带缩短率的环扎加压术术后短期内视网膜血供受无影响,彩色多普勒超声是检测眼部血流变化的较理想方法。

AIM:To observe the ocular hemodynamic changes in the eyes of patients with rhematigenous retinal detachment before and after the scleral encircling procedure with the encircling band shorten in a certain range. ·METHODS:Central retinal arteries (CRA)were studied with color Doppler imaging (CDI) in 28 patients with unilateral rhematogenous retinal detachment,the fellow eyes served as control.The measured parameters included peak systolic velocity(Vmax),end diastolic velocity(Vmin),mean velocity(V),resistance index(RI) and pulsatility index(PI). ·RESULTS:A comparison of the indexes of CRA in both the sick eyes before the operations and the eyes in the control group found the differences among them no statistical significance. The Vmax,Vmin,RI and PI of the CRA of the sick eyes all increased 14 days after the operations,but not reached statistical significant difference,and showed no statistical significance as compared with those in the control group. ·CONCLUSION:Scleral buckling procedure with the encircling band shorten in a certain range can not change blood flow in retinal tissue for a short time after surgery. Color Doppler imaging is a useful tool for the studies of ocular hemodynamics changes.

R779.6