【摘要】 目的:探讨兔眼玻璃体切割术后晶状体混浊的情况变化。方法:选用Dutch Bbelted兔63只,随机分为3组,玻璃体切割联合平衡盐填充(平衡盐组);玻璃体切割联合200mL/L C3F8填充(气体组);玻璃体切割联合硅油填充(硅油组)。观察3mo晶状体混浊变化情况及术后不同时间眼压变化情况。结果:玻璃体切割术后玻璃体腔内填充200mL/L C3F8气体,术后并发性白内障的发生率为85.7%;填充硅油术后并发性白内障的发生率为19.1%;填充平衡盐术后并发性白内障的发生率为14.3%,各组术后眼压较术前变化稳定,无统计学意义。结论:兔眼玻璃体切割术后气体注入组晶状体混浊的发生率最高,术后尽早取出硅油可以降低术后晶状体混浊的发生率。
【关键词】 玻璃体切割术;并发性白内障;眼内填充物
Animal mold evaluation of complicated cataract after vitrectomy with different intraocular filling materrials
HongSheng Bi, XiaoFeng Xie, Ying Wen, DongMei Liu, JianFeng Wu, Yan Cui, Chao Yu Foundation item: National Natural Science Foundation of China (No.30740029) Eye Center of Shandong University of Traditional Chinese Medicine, Jinan Shierming Eye Hospital, Jinan 250002, Shandong Province, China
Abstract AIM: To study the change of the lens opacity degree after vetretomy. METHODS: Sixtythree Dutch Bbelted rabbits were asisgned randomly to three groups: BBS group received vitrectomy with BBS; gas group was given vitrectomy with 200mL/L C3F8, and silicone oil group was preformed vitrectomy with silicone oil. The change of the lens opacity degree 3 months after operation and IOP at different times were observed.RESULTS: The complicated cataract rate of gas group, silicone oil group and BBS group was 85.7%, 19.1 %, and 14.3% respectively. There were no significant differentces of IOP among three groups. CONCLUSION: Different intraocular filling materrials may be involve complicated cataract in rabbits lens after vitrectomy, among which the lens opacity rate is the highest after operation at the gas group, take silicone oil after operation as early as possible may lower the lens opacity rate.
KEYWORDS: vitrectomy; complicated cataract; intraocular filling materrials
0引言
玻璃体切割术后行气体或硅油填充导致晶状体混浊加重,进而影响患者视功能的恢复目前越来越引起人们的关注。随着玻璃体切割技术的进步,人为造成晶状体损伤的可能性很小,但术后并发性白内障的发生率仍然较高,其发生机制仍然不清楚,我们就兔眼玻璃体切割术后玻璃体腔内气体或硅油填充并发性白内障的发生情况及变化做一统计并分析,为其进一步研究发病机制奠定基础。
1材料和方法
1.1材料
Dutch Bbelted兔63只(山东中医药大学动物中心),雌雄兼用, 1000~1500g,2~3月龄,实验前,经裂隙灯显微镜逐眼观察,晶状体均透明,眼底正常。随机分为3组,每组21只:A组行单纯玻璃体切割联合平衡盐填充术;B组行玻璃体切割联合200mL/L C3F8填充,C组行玻璃体切割联合硅油填充。过氟化碳气体:C3F8(过氟丙烷)天津晶明新技术开发有限公司;灌注液:必施BSS爱尔康公司(美国)。YZ5E裂隙灯苏州医疗器械厂;裂隙灯照相系统;眼压计:台式眼压计Canon Tonometer TX10 (日本);DORC超乳、玻切仪(Dutch Ophthalmic Research Center bv Holland);显微镜:苏州六六视觉YZ20P5;硅油:博士伦公司(美国)。
1.2方法
由同一术者在眼科手术显微镜下行右眼玻璃体切除术,手术方法如下:开睑器开睑,手术显微镜下沿角巩膜缘剪开鼻上方至颞上方的结膜,结膜下作钝性分离,暴露巩膜,用巩膜穿刺刀在上方12∶00距角巩膜缘2.5~3.0mm的巩膜上做穿刺口,然后用60尼龙线做预置缝线,将灌注头插入穿刺口,拉紧缝线固定灌注头后打结,确定灌注头在玻璃体腔内且未触及晶状体;再用巩膜穿刺刀在2∶00及10∶00方向,距角巩膜缘2.5mm的巩膜上分别做穿刺口。左边插入导光纤维,右边插入玻切头。(插入时注意方向向下,避免损伤晶状体);打开灌注(灌注液用BSS液),调节光导纤维的亮度为100,玻切速率为600cpm,抽吸力为300mmHg。在平凹镜及斜镜的帮助下,切除前中部玻璃体;玻切结束后直接关闭各个穿刺口(BSS组),或者在凹镜帮助下行气液交换 (22mmHg)后玻璃体腔内注入硅油(硅油组)2mL或200mL/L的C3F8(气体组)约0.8mL,然后关闭各个穿刺口,术毕,结膜囊内涂红霉素眼膏;术后每天点氧氟沙星滴眼液, 6次/d,持续2wk。
2结果
兔眼玻璃体切割术后并发白内障的发生率与使用不同的玻璃体腔填充物密切相关,玻璃体切割眼内填充C3F8气体术后并发性白内障的发生率为85.7%,填充硅油为14.3%,填充BSS平衡液为19.1%。气体填充组术后并发性白内障的发生率明显高于另两组(P<0.05,表1)。3组术前与术后3,7,14, 20,30d眼压比较差异无显著性(P>0.05),3组组间眼压两两比较也无显著性差异(P>0.05,表2)。表1 术后各组家兔晶状体混浊的数目及总混浊率(略)表2 各组家兔眼压变化(略)
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