Effert R, Wolf S, Arend O, Schulte K, Reim M
Universitäts-Augenklinik, RWTH Aachen, Germany.
Ger J Ophthalmol. 1994 Mar;3(2):65-7.
Pars plana vitrectomy with silicone-oil tamponade is frequently performed in cases of complicated retinal detachment. Because of the lower specific gravity and the lower surface tension of silicone oil in comparison with the aqueous phase of the vitreous, an influence on the blood flow in the retinal vessels would be expected. However, not only the silicone oil but also the operative trauma and a buckling procedure may have an influence on the retinal blood flow. To examine this question we measured the arteriovenous passage time in the silicone-oil-filled eye and in the contralateral eye in 14 cases using a laser scan ophthalmoscope at 3-5 days after surgery. The arteriovenous passage time is a parameter for the retinal microicirculation. In all cases we found a prolonged arteriovenous passage time in the silicone-oil-filled eye in comparison with the contralateral eye (mean value +/- SD, 2.5 +/- 0.8 vs 1.25 +/- 0.25 s; P < 0.01). The prolongation of arteriovenous passage times observed in silicone-oil-filled eyes indicates that the microcirculation is worsened at least during the early postoperative period.
在复杂性视网膜脱离病例中，常进行玻璃体切除术联合硅油填充。与玻璃体的水相相比，硅油的比重较低且表面张力较小，因此预计会对视网膜血管的血流产生影响。然而，不仅硅油，手术创伤和巩膜扣带术也可能对视网膜血流产生影响。为了研究这个问题，我们在术后3 - 5天使用激光扫描检眼镜测量了14例患者硅油填充眼和对侧眼的动静脉通过时间。动静脉通过时间是视网膜微循环的一个参数。在所有病例中，我们发现与对侧眼相比，硅油填充眼的动静脉通过时间延长（平均值±标准差，2.5±0.8秒对1.25±0.25秒；P < 0.01）。硅油填充眼中观察到的动静脉通过时间延长表明，至少在术后早期微循环恶化。
