放射状视神经切开术治疗视网膜中央静脉 阻塞的初步观察

目的观察放射状视神经切开术（RON）治疗视网膜中央静脉阻塞（CRVO）的临床效果。方法回顾分析 5例经平坦部玻璃体途径行RON治疗的CRVO患者的临床资料。其中，2例患者手术前确诊为CRVO，手术前后分别进行视力、眼底照相、荧光素眼底血管造影（FFA）、彩色超声多谱勒（CDI）血流扫描、电脑视野及光相干断层扫描（OCT）等检查；3例患者因玻璃体积血接受手术治疗，手术中确诊为CRVO所致。5例均有明显黄斑水肿。对比观察患者手术前后视力、眼底检查及手术后眼底照相和OCT检查结果。手术后随访12个月。结果除1例患者视力下降外，其余4例患者视力均有不同程度提高。 眼底照相和（或）FFA、OCT检查显示手术后1个月时黄斑水肿均明显消退，手术后2个月时眼底出血基本吸收， 1例行视野检查者显示手术后视野改善。1例手术后出现玻璃体积血，2例手术中穿刺视盘时出血。结论RON可有助于CRVO患者改善患眼黄斑水肿，减少眼底出血，防止新生血管形成，并能一定程度地提高视力，对治疗CRVO具有一定可行性及临床价值。但尚需要较大规模、多中心的随机临床对照观察来进一步研究证实。(中华眼底病杂志,2005,21:6-9)

Radial optic neurotomy for central retinal vein occlusion

Objective To observe the clinical effect of radial optic neurotomy (RON) for central retinal vein occlusion (CRVO). Methods The clinical data of 5 patients with CRVO who had undergone RON after a standard three-port vitrectomy were analyzed retrospectively. In the 5 patents, CRVO was diagnosed in 2 before the surgery, and the examination of visual acuity, fundus photography, fundus fluorescein angiography (FFA), color doppler imaging (CDI), and examination of perimeter and optic coherence tomography (OCT) were performed on them before and after the operations, respectively. Three patients underwent the operation because of the vitreous hemorrhage and CRVO was diagnosed during the surgery. All of the 5 patients suffered from severe macular edema. The results of post-operative visual acuities, fundus examination, fundus photography and OCT were compared with those of the pre-operative ones. The follow-up after the surgery was 12 months. Results The visual acuities improved in 4 patients and decreased in 1. The results of fundus photography and (or) FFA, and OCT revealed that the macular edema was evidently alleviated 1 month after the surgery and the retinal hemorrhage was absorbed ultimately 2 months after the surgery. The result of examination of perimeter performed on 1 case showed the improvement of visual field. In addition, vitreous hemorrhage occurred in 1 patient postoperatively and hemorrhage occurred in 2 in the operation puncturing the optic disk. Conclusions RON is helpful to ameliorate the macular edema, reduce the retinal hemorrhages, prevent the neovascularization and enhance the visual acuity to some extent, which maybe clinically feasible and valuable in treating CRVO,but more prospective, randomized, and multi-center researches are still needed to verify the efficacy.