不同准分子激光治疗仪对角膜组织切削深度预测性的评价  

Evaluation of the predictability of ablation depth in photorefractive procedures by Zeiss MEL80 and VISX Star S4 excimer laser

作　　者：郑秀云[1] 雷玉琳[1] 刘素美[1] 孟小丽[1] 

机构地区：[1]济南市明水眼科医院,山东省250200

出　　处：《眼科》2010年第3期186-188,共3页Ophthalmology in China

摘　　要：目的评价蔡司MEL80和威视VISX Star S4两种准分子激光治疗仪切削深度的预测性。设计前瞻性对比研究。研究对象84例(168眼)近视及散光患者。方法采用眼前节OCT分别测量两种激光仪治疗前后患者的角膜厚度,计算实际切削量,与相应仪器显示的预计切削量比较,并对其差异值作回归分析。主要指标角膜厚度、切削深度。结果蔡司MEL80实际切削量与预计切削量比较,差异无统计学意义。威视VISXStarS4实际切削量大于预计切削量,在中度近视组和高度近视组差异有统计学意义。△切削量为实际切削量与预计切削量的差值,威视△切削量与近视、散光相关分析,r=0.643,P=0.000,具有高度相关性。其回归方程为:△切削量(VISXStarS4)=2.324*|近视|+5.270*|散光|-6.772。结论不同的准分子激光治疗仪其预测切削深度与实际深度存在差异,临床医师需掌握其特点,以提高LASIK手术的安全性。Objective To evaluate the predictability of ablated depth in photorefractive procedures by Zeiss MEL80 and VISX Star S4 excimer laser. Design Prospective, comparative case series. Participants 168 eyes of 84 people with myopia and cylinder. Main Outcome Measures Corneal thickness and ablated depth. Methods The thickness of cornea by Zeiss MEL80 and VISX Star S4 were measured by anterior segment OCT. The actuality ablated depth and calculated depth were compared. Results There were no sig- nificant differences between actuality ablated depth and calculated depth in Zeiss MEL80. And in VISX Star S4, the actuality ablated depth was more than calculated depth. Linear regression of changes in ablated depth on myopia and cylinder yielded the following for- mulaus ：A ablated depth （VISX Star S4）= 2.324 ＊lmyopial＋ 5.270 ＊lcylinderl-6.772. Conclusions Different excimer laser has different changes between actuality ablated depth and calculated depth. To guarantee the safety of LASIK, Ophthalmologists should know the characteristics of the excimer laser.

关 键 词：近视 外科学 激光 准分子 切削深度 预测性 

分 类 号：R779.63[医药卫生—眼科]