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目的 评价半导体激光光凝巩膜使之收缩的效果。方法 10只灰兔眼和 8只猪眼表面涂吲哚花青 (ICG)溶液 ,浓度 5 g· L- 1 ,另 8只猪眼不涂 ICG溶液。激光功率 0 .6～1W,脉宽 1.0～ 1.5 s,光斑直径 2 0 0μm。光凝时探头轻贴巩膜表面。结果 兔眼平均赤道部周长从术前 6 0 .0 0 m m 下降到 5 8.45 mm,下降 1.5 5 mm;猪眼无 ICG组平均周长从76 .0 8mm下降至 72 .87mm ,下降 3.2 1m m ;猪眼 ICG组平均周长从 75 .5 8mm下降到6 2 .71mm,下降 12 .77m m。结论 调整激光参数、改进 ICG溶液浓度及应用方式 ,可望使该术式既能达到合适的巩膜环扎效果 ,又能在需要的部位光凝封闭视网膜裂孔 ,治疗变性的视网膜
Objective To evaluate the effect of semiconductor laser photocoagulation sclera to make it shrink. Methods Ten rabbits eyes and eight pig eyes were exposed to indocyanine green (ICG) solution with a concentration of 5 g · L -1 and the other eight piglets were not coated with ICG solution. Laser power 0.6 ~ 1W, pulse width 1.0 ~ 1.5 s, spot diameter 200μm. Photocoagulation probe gently attached scleral surface. Results The average length of the equatorial portion decreased from 60.0 mm to 5 8.45 mm and decreased to 1.55 mm in preoperative eyes. The average perimeter of pigs without ICG decreased from 76.0 mm to 72.87 mm, down 3.2 m m; the average perimeter of the pig-eye ICG group decreased from 75.58 mm to 62.71 mm, and decreased by 12.77 m m. Conclusion Adjusting the laser parameters and improving the concentration and application of ICG solution are expected to achieve the appropriate scleral cerclage effect and photocoagulation at the required site to close the retinal breaks and treat the degenerative retina