文档介绍：LASIK术中负压吸引时间对猪角膜瓣厚度和直径的影响
作者:马小力,徐建刚,刘汉强
【摘要】目的:探讨准分子激光原位角膜磨镶术(LASIK)术中负压吸引时间对角膜瓣厚度和直径的影响。方法:根据负压吸引时间的不同将60只猪眼随机分为3组:组1(10s)、组2(20s)和组3(30s),使用法国产Moria M2型角膜板层刀分别吸引角膜10s,20s和30s后切削角膜瓣,利用角膜超声测厚仪测量角膜瓣厚度,应用镀铬游标卡尺测量角膜瓣直径。结果:组1、 ±,±±,各组间比较有显著性差异(P=)。±(组1,10s),±(组2,20s)±(组3,30s)。各组间比较有显著性差异(P<)。结论:LASIK术中随着负压吸引时间的延长,角膜瓣厚度和直径均增加。
【关键词】负压吸引;角膜瓣厚度;LASIK
Abstract AIM: To determine the effect of suction duration on thickness and diameter of corneal flap created by microkeratome in porcine eyes in laser in situ keratomileusis (LASIK).METHODS: Sixty porcine eyes were randomly assigned to three groups according to different suction durations: group 1 (10 seconds), group 2 (20 seconds), and group 3 (30 seconds). A Moria M2 microkeratome (Moria, France) with a 160μm head was used to create a corneal flap. Corneal flap thickness was measured by automated ultrasonic pachymetry, and the flap diameter was measured by a vernier : The flap thickness of group 1, group 2 and group 3 was ±, ± and ±, respectively. There was a statistically significant difference among three groups (P=0.
001). The mean flap diameter in groups 1, 2 and 3 was ±, ± and ±, respectively. A statistically significant difference was found among groups (P<).CONCLUSION: In LASIK in porcine eyes, an increase in suction duration resulted in a thicker and greater flap.
KEYWORDS: suction duration; lamellar corneal flap thickness; LASIK
INTRODUCTION
Since its introduction in 1990[1], laser in situ keratomileusis (LASIK) has e currently the most frequently used surgical treatment to correct refractive errors worldwide[2,3]. LASIK involves a primary procedure of creating a corneal flap by microkeratome. The flap thickness based on the distance between the fixed microkeratome plate and the edge of the met