Pentacam眼前节分析系统在激光周边虹膜切除术前后眼前节结构评估中的应用

目的 评价Pentacam 眼前节分析系统的临床应用价值.方法 自身对照研究.33例(61只眼)原发性闭角型青光眼和原发性房角关闭患者,在接受掺钕钇铝石榴石激光周边虹膜切除术前及术后,应用Pentacam眼前节分析系统进行眼前节摄像和图像分析,同时分别测定患者眼前房相关量化指标.激光周边虹膜切除术前后各检测参数的变化比较采用配对t检验.结果 Pentacam眼前节分析系统能够清晰显示激光治疗前后眼前节结构变化,如虹膜变平坦及周边前房加深.患者术后平均眼前房容积(94.10±18.42)mm3(t=-15.928);最小前房角(24.93±4.53).(t=-5.087);周边前房深度:颞侧(1.23±0.23)mm(t=-17.399),上方(1.03±0.20)mm(t=-10.629),鼻侧(0.99±0.21)mm(t=-12.576),下方(1.16±0.24)mm(t=-14.474);上述参数与术前比较均明显增加,差异有统计学意义(均P＜0.01).其中前房容积从术前的(74.10±16.35)mm3增加到术后的(94.10±18.42)mm3,周边前房深度的增加幅度为0.17 mm(鼻侧)至0.29 mm(颞侧);而中央前房深度较术前无明显增加.结论 Pentacam眼前节分析系统可定性和定量反映原发性闭角型青光眼和原发性房角关闭眼激光周边虹膜切除术后前房形态和参数的变化.

Evaluation the value of Pentacam anterial segment analysis system in the study of anterior segment of the eye before and after laser periphery iridectomy

Objective To evaluate the anterior segment parameters in early primary angle-closure glaucoma (PACG) and primary angle closure (PAC) eyes before and after neodymium: yttrium aluminum garnet (Nd:YAG) laser periphery iridectomy (LPI) by using Pentacam system. Methods Self-coutrol study. Sixty one eyes of 33 patients were recruited into this study. The images of the anterior segment of the eye were captured and the parameters[I.e. The anterior chamber ( AC ) volume, the central AC depth, the peripherial AC depth, the peripherial AC angle and the pupil size]were measured by the Pentaeam system pre-operatively and 1 week after laser treatment. Results The Pentacam system clearly showed the structure changes of the anterior segment after LPI ( I. E. The convex configuration of the iris was flattened and the peripherial AC depth was deepened). The average AC volume( t = 15. 928 ), the peripherial AC depth( t =- 17. 399, - 10. 629, - 12. 576, - 14. 474 ) and the peripherial AC angle( t = - 5. 087 ) were increased significantly (P ＜0. 01 ) after LPI. The AC volume was (74. 10 ± 16.35 ) mm3 before LPI and (94. 10 ±18.42) mm3 after LPI, and the increases of peripherial AC depth were 0. 17 mm (nasal) and 0. 29 mm (temporal). There was no statistical significant changes in the AC depth before and after LPI. Conclusion In patients with PACG and PAC, the changes of AC after LPI can be demonstrated by the Pentacam qualitatively and quantitatively.