摘要:
目的:不同浓度丝裂霉素(MMC)对LASEK术后效果的影响方法:选择261例496眼LASEK患者随机分为两组,0.4mg/mLMMC(mytomycin C,MMC)组133例245眼,0.2mg/mL MMC组128例251眼,于LASEK手术完毕后滴于切削区,根据屈光度<-3.00,-3.25~-6.00,-6.25~-9.00,>9.25分别置留30,60,90,110s,术后随访两组患者视力、haze、角膜内皮细胞密度及眼压和术后用药时间。结果:随访1a,术后1 a haze的发生率,0.4mg/mL MMC组1.2%,0.2mg/mL MMC组13.2%;术后1a时,0.4mg/mLMMC组影响视力者为0.8%,0.2mg/mL MMC组2.0%。术后1,6,12mo患者等值球镜变化情况,0.4mg/mL MMC组分别为:-0.52±0.09,-0.29±0.15,-0.35±0.16;0.2mg/mL MMC组分别为:-0.67±0.11 D,-0.58±0.21D,-0.54±0.18D。术前及术后1,6,12mo角膜内皮镜检查角膜内皮细胞密度情况,0.4mg/mL MMC组分别为:2994.01±321.89,2974.89±339.87,3001.02±306.92,3011.18±321.31;0.2mg/mL MMC组分别为:3005.92±382.54,2996.69±374.19,2988.37±367.33,3000.05±299.84。两组各指标的比较,差异有统计学意义(P<0.05)。0.4mg/mL MMC组取镜后出现2例3眼丝状角膜炎;0.2mg/mL MMC组取镜后出现2例2眼丝状角膜炎。结论:术中使用0.4mg/mL MMC可以减少LASEK术后并发症,使用较为方便,并且安全有效,效果优于0.2mg/mLMMC。