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业已有报道巩膜扣带术后脉络膜血流的改变,但尚无视网膜血流改变的报告。作者等用无损伤性激光多普勒(Doppler)检查法测量5例巩膜扣带术后无并发症者的视网膜循环。一例做了拆除巩膜扣带前后的测量;另一例一眼做了局部植入物及环扎带,而对侧眼仅做了局部植入物并比较其视网膜循环特性的差别。此法是根据激光多普勒效应:从红细胞血流中散射出来的激光以频率改变的方式来表示其量的变化(△f)并和细胞流速(V)成正比。最大频率改变(△f_(max))和该时最大红细胞速度的改变(V_(max))成正比。由于人类视网膜动脉血流是搏动性的并和心脏搏动周期同步,因此△f_(max)表示收缩与舒张的规律性变化。电子处理散射激光,每100
There have been reports of changes in choroidal blood flow after scleral buckling, but no reports of changes in retinal blood flow have been reported. The authors used noninvasive laser Doppler (Doppler) examination of 5 cases of scleral buckling with no complications of retinal circulation. One case made the measurement before and after the scleral buckle was dismantled; the other case made partial implants and cerclage at one glance, while the contralateral eye only made partial implants and compared their retinal circulation characteristics. This method is based on the laser Doppler effect: the laser light scattered from the red blood cell blood flow changes its frequency (Δf) and is proportional to the cell flow rate (V). The maximum frequency change (Δf_ (max)) is proportional to the change in the maximum red blood cell velocity (V_ (max)) at this time. Since human retinal artery blood flow is pulsatile and synchronized with the heart beat cycle, Δf max represents the regular change in contraction and relaxation. Electronic processing scattered laser, every 100