摘要
目的探讨宽带巩膜环扎修复视网膜脱离手术对眼球、玻璃体腔容积和三维径线的影响。方法2002年7月至2003年12月间,对行巩膜宽带环扎术并手术成功的26例孔源性视网膜脱离患者,采用眼科超声仪、角膜地形图及磁共振成像(MRI)技术检测眼球相关指标。其中对13例患者(13只眼)分别于术前、术后1周用MRI连续薄层快速扫描技术和层面叠加方法测量眼球、玻璃体腔的尺寸和容积。结果13只视网膜脱离眼经宽带巩膜环扎术复位后,用MRI检测,显示眼球容积较术前减小(1.72±0.49)ml(t=12.68,P<0.01),玻璃体腔容积较术前减小(1.73±0.46)ml(t=20.13,P<0.01);前房容积增加(0.01±0.04)ml(t=0.51,P=0.62);环扎带凹陷最深处的水平径、垂直径较术前赤道后2.5mm预环扎部位分别减小(7.84±1.86)mm(t=15.20,P<0.01)、(7.70±2.79)mm(t=9.96,P<0.01)。环扎带凹陷最深处的周长较术前显著减小(t=13.18,P<0.01),缩短量为(24.42±6.68)mm,缩短比例为(33.11±8.69)%。环扎嵴平均高度为(3.80±0.58)mm;平均嵴宽:颞侧(3.82±0.60)mm,鼻侧(3.51±0.76)mm。术后眼球前后径平均仅缩短(0.22±0.79)mm(t=1.01,P=0.33)。结论应用MRI生物学测量技术,较直观地测量和分析巩膜环扎术对眼球玻璃体腔容积和三维径线的影响。其检测指标可为巩膜环扎术修复视网膜脱离的最佳定量解剖复位和视功能恢复的相关性研究提供参考数据。
Objective To assess the changes of the volume and dimensions of the eyeball and the vitreous following encircling seleral buckle. Methods 26 eyes from 26 patients received successful broadband encircling seleral buckles for rhegmatogenous retinal detachment from July 2002 to December 2003. The examinations, A-scan ultrasonography （SONOMED A-5500 ,USA）, Corneal topography and MRI, were performed preoperatively and at the first week postoperatively. The volume of the eyeballs and the dimensions along the three cardinal axes from 13 eyeballs were measured with Gyroscan MR imaging system. Results The measurement of MRI for the 13 eyes operated with the encircling scleral buckling revealed that the volume of the eyeball was decreased （ 1.72 ± 0.49 ） ml, and volume of vitreous was decreased （ 1.73 ± 0. 46） ml in the comparison with volume before surgery. Horizontal and vertical dimensions of eyeball were decreased （7.84 ± 1.86） mm,（7. 70 ±2. 79） mm respectively. The length of circumference was decreased to （24. 42 ± 6.68） ram, the percentage of the decrease was （33.11 ± 8. 69） %. The average high of the buckle indentions was （3. 80 ± 0. 58） nun with the average width of （ 3. 82 ± 0. 60） mm in the temporal part and （3. 51 ±0. 76） man in the nasal part. Conclusions The length of the eircumferenee at the site of buekling is shorted, and the volume of the vitreous was deereased after the surgery. The teehnique of MRI has an important role in the measurement and analysis of the volume and the dimension of the eyeball.
出处
《中华眼科杂志》
CAS
CSCD
北大核心
2006年第2期150-154,共5页
Chinese Journal of Ophthalmology
关键词
巩膜扣带术
视网膜脱离
玻璃体
磁共振成像
Seleral buekling
Retinal detachment
Vitreous body
Magnetic resonance imaging
