高海拔地区Moria M2自动微型角膜刀在LASIK手术中稳定性的研究

目的探讨高海拔地区Moria M2自动微型角膜刀在LASIK手术中的稳定性。方法在2295米的高海拔地区,通过观察286例570眼LASIK手术中制作的角膜瓣的质量、出现的瓣并发症及制作角膜瓣厚度的可预测性,以判断高海拔地区MoriaM2自动微型角膜刀在手术中稳定性。结果Moria M2自动微型角膜刀制作的所有角膜瓣均获成功,未出现严重缺陷的角膜瓣。但系统产生的固定眼球的负压吸引力低,制作角膜瓣时眼球的不稳定性增加,发生相关并发症(如瓣偏位)的几率增加。另外制作的角膜瓣厚度比理论值高。结论在高海拔地区Moria M2自动微型角膜刀在LASIK手术中总体性能稳定,制作角膜瓣可靠。但在计算安全角膜厚度时应多保留22μm。而且术中应注意避免影响刀头运行的任何不利因素。

Research on the stability of Moria M2 auto-microkeratome in LASIK operations in high sea-level regions

Objective To research the stability of Moria M2 auto-microkeratome in LASIK operations in high sea-level regions. Method By observing the quality of corneal flap,the complication and the predictability of corneal thickness among 286 LASIK operations made in the region of 2295 meters above sea-level. Judge the stability of Moria M2 auto-microkeratome in LASIK opertions in high sea-level regions.Results All the corneal flap produced by Moria M2 auto-microkeratome were successful. None had serious defective flap. However,the negative suction produced by the system while fixing the eyeball increased the unstability of eyeballs when produce the corneal flap, and increased the chance of complication happening. The corneal flap produced should be thicker than theoretical data. Conclusions On the whole,in high sea-level regions, Moria M2 auto-microkeratome is stable and reliable in LASIK operations, but when evaluate safe corneal thickness, it should keep 22mm more.Besides, it must avoid any disadvantageous elements which will affect the work of the microkeratome head.