后巩膜加固术加固条带长度估算的研究  

Calculation methods of foreign scleral belt length for posterior scleral reinforcement surgery

作　　者：Sucijanti 段安丽[1] 佘海澄[1] 齐越[1] 雷鹍[2] 李思珍[1] 王宁利[1] 

机构地区：[1]首都医科大学附属北京同仁医院北京同仁眼科中心北京市眼科学与视觉科学重点实验室,100730 [2]首都医科大学附属北京天坛医院,100050

出　　处：《眼科》2013年第1期53-57,共5页Ophthalmology in China

基　　金：首都医学发展科研基金(2009-3103)

摘　　要：目的比较单条兜带式后巩膜加固术异体巩膜长度三种计算方法的准确性。设计技术评价。研究对象2008年12月-2010年2月北京同仁医院病理性近视眼62例(65眼)。方法所有患者接受后巩膜加固术。术前检查屈光度、角膜曲率、前房深度、眼轴等。后巩膜加固术异体巩膜长度计算采用3种方法,方法 1和方法 2根据眼球几何计算方法设计,前者主要利用前房深度值,后者主要利用角膜曲率值;方法3根据术中测量实际应用的异体巩膜长度,建立回归公式进行计算。三种方法计算值分别与实际应用异体巩膜长度比较。主要指标异体巩膜长度、眼轴、角膜曲率、前房深度、屈光度。结果 65眼应用的实际异体巩膜平均长度(47.8±4.0)mm。对异体巩膜长度的预测结果方法1为(58.7±8.0)mm,与实际差值(10.8±5.2)mm;方法2为(58.6±8.0)mm,与实际差值(10.7±5.2)mm;方法3为(47.8±3.3)mm,与实际差值(0.00±2.22)mm。方法3建立的回归方程:异体巩膜条带长度=9.576+1.271×眼轴。方法1、2、3与实际值的相关系数(r值)分别为0.822、0.829、0.835。结论单条兜带式后巩膜加固术需要的异体巩膜长度可通过以眼轴为基础的回归公式计算,未建立回归公式前可根据几何公式进行推算。Objective To evaluate the accuracy of three methods to caculate the length of foreign scleral materials （LSM） for posterior scleral reinforcement surgery. Design Evaluation of technique. Participants 62 patients （65 eyes） with high myopia in Beijing Tongren Hospital from 2008-2010. Methods All patients received revised Synder-Thompson posterior scleral reinforcement （PSR）. The refraction, corneal curvature, anterior chamber depth and axial length （AL） were examined preoperatively. Three methods were used for calculation of the length of foreign scleral material. Method 1 and method 2 were based on geometric calculation of anterior chamber depth or corneal curvature. Method 3 was based on regression equation according to the actual length of foreign scleral material used during the surgery. Main Outcomes Measures Length of sclera material, corneal curvature, anterior chamber depth and axial length. Results The actual length of sclera material in all 65 eyes was 47.8＆plusmn;4.0 mm. Mean length of foreign scleral materials in method 1, 2, 3 was 58.7＆plusmn;8.0 mm, 58.6＆plusmn;8.0 mm, 47.8＆plusmn;3.3 mm, respectively. The regression equation of method 3： LSM=9.576＋1.271＆times;AL. All three methods were highly correlated with actual length of scleral material （r=0.822, 0.829, 0.835）. Conclusions The regression equation method based on eyeball axial length can predict the length of scleral material more accurately than the other two methods based on geometric calculation of eyeballs. （Ophthalmol CHN, 2013, 22： 53-57）

关 键 词：后巩膜加固术 异体巩膜长度 眼轴 

分 类 号：R779.6[医药卫生—眼科]