虹膜拉钩联合可缝合囊袋张力环在马方综合征晶状体半脱位患者中的应用

目的探讨虹膜拉钩联合可缝合囊袋张力环（MCTR）在马方综合征晶状体半脱位患者中应用的有效性和安全性。方法马方综合征晶状体半脱位患者5例（7只眼）。行3．2mm透明角膜隧道切口及连续环形撕囊后,使用2-4个一次性尼龙虹膜拉钩钩住撕囊边缘,以稳定晶状体囊袋,并使其居中,完成晶状体抽吸、MCTR植入及缝合固定。于晶状体囊袋内植入折叠人工晶状体。结果6只眼术后12个月最佳矫正视力≥0．8,1只眼为0．7。眼前段分析系统获得Scheimpflug图像分析人工晶状体居中性好。超声活体显微镜显示所有患者人工晶状体襻及MCTR均位于晶状体囊袋内,MCTR的固定钩稳定地位于虹膜与晶状体囊膜间。反光裂隙灯显微镜照相分析显示1只眼出现较明显晶状体后囊膜混浊。无玻璃体脱出、视网膜脱离等术中术后并发症的发生。结论虹膜拉钩的使用可维持术中晶状体囊袋的稳定及手术过程的操作安全。MCTR植入可维持术后人工晶状体的长期稳定性,安全有效地避免马方综合征患者进行性加重的晶状体悬韧带异常导致的术后人工晶状体脱位。

Iris hooks and modified capsular tension ring for subluxation lens in patients with Marfan's syndrome

OBJECTIVE: To evaluate clinical efficiency and safety of the iris hooks and modified capsular tension ring (MCTR) for the treatment of subluxation lens in patients with Marfan's syndrome. METHODS: This study comprised 5 patients (7 eyes) with Marfan's syndrome and subluxation lens. After 3.2 mm clear cornea incision and continuous curvilinear capsulorhexis (CCC), 2 - 4 disposable nylon iris hooks were inserted through the stab incisions and placed in the capsulorhexis to support the capsule and enlarged the CCC. Following irrigation/aspiration, a MCTR with suture in its eyelet was placed in the capsule bag. After tightening and tying the suture of MCTR, the capsular bag was centered and fixed. A foldable AcrySof one-piece intraocular lens (IOL) was then placed in the capsule bag. RESULTS: Twelve months after the operation, the best corrected visual acuity was >/= 0.8 in six eyes and 0.7 in one eye. The scheimpflug images obtained from the Pentacam demonstrated that the IOL were well centered. UBM showed that all the MCTR and the haptics of the IOL were in the capsule bag, the eyelet of the MCTR was rested stably between the capsulorhexis margin and the iris. The retroillumination photograph indicated that only one eye had obvious posterior capsular opacification. No intraoperative and postoperative complications such as prolapse of vitreous and retina detachment was occured. CONCLUSIONS: The iris hooks can provide excellent intraoperative capsule-lens stability and facilitate the manipulation during operation. MCTR allows additional suture fixation to the eye wall without damaging the capsular bag and maintains the long-term stability of the intraocular lens. Furthermore, MCTR is helpful for avoiding dislocation of the IOL due to progressive weakening of the zonular fibers in some patients and provides long-term safety.