Indications for and techniques of keratoplasty at Vietnam National Institute of Ophthalmology

AIM： To report the indications for and techniques of corneal transplantation at Vietnam National Institute of Ophthalmology （VNIO） over a period of 12y （2002-2013）, METHODS： Records of patients who had undergone corneal transplantation at VNIO from January 1, 2002 to January 1, 2014 were reviewed to determine the indication for and type of corneal transplant performed. Patient age, gender, indication for corneal transplantation and surgical technique were recorded and analyzed. RESULTS： Corneal transplantation were underwent in 1390 eyes of 1278 patients with a mean age of 44.9±18.1y during the period under review. The most common indication was infectious corneal ulcer （n=670; 48.2%）, followed by corneal scar （n=333, 24.0% ）, corneal dystrophy （n=138, 9.9%） and failed graft （n=112, 8.1%）. Nearly all procedures performed were penetrating keratoplasty （n=1300, 93.5% ）, with a few lamellar keratoplasty procedures performed： lamellar keratoplasty （n=52, 3.7%）, Descemet＇s stripping automated endothelial keratoplasty （n =27, 1.9% ） and deep anterior lamellar keratoplasty （n =11, 0.8%）.CONCLUSION： While the most common indication for keratoplasty was infectious keratitis, nearly all indications for corneal transplantation were managed with penetrating keratoplasty, However, lamellar keratoplasty techniques, including deep anterior lamellar keratoplasty and Descemet＇s stripping automated endothelial keratoplasty, are being performed with increasing frequency for isolated stromal and endothelial disorders, respectively,

角膜移植的研究进展

角膜移植是用透明、健康的供体角膜组织替换混浊病变的角膜组织,使患者复明或控制角膜病变,达到增进视力或治疗某些角膜疾病的眼科治疗方法。传统角膜移植分为穿透性角膜移植和板层角膜移植。近10a,深板层角膜移植和内皮细胞移植手术逐渐崛起。而目前,人工角膜移植手术的发展为不适合传统穿透性角膜移植手术的患者提供一种新的选择。本文综述了目前角膜移植领域手术技术的适应证、术后并发症等。

角膜绷带镜对生物工程角膜移植术后的临床治疗作用

目的观察角膜绷带镜对生物工程角膜移植术后的临床治疗作用。方法收集我院2017年1月至2018年6月住院并使用生物工程角膜进行板层角膜移植手术治疗的感染性角膜溃疡患者30例30眼的临床资料,随机分为A、B两组,各15例。A组角膜上皮愈合后给予戴角膜绷带镜联合滴眼液点眼治疗,2周更换1次,术后3个月拆线后停用。B组患者不戴角膜绷带镜,药物治疗同A组。观察生物工程角膜移植术后角膜植片上皮化时间,比较术后第1、2、3、4周两组角膜植片水肿程度,比较术后第1、2、3个月两组角膜植片上皮完整性和泪膜破裂时间(breakup time of tear film,BUT),比较两组角膜植片水肿消退时间和术后3个月两组角膜植片存活率。结果术后3~5 d角膜植片上皮化,2~4周植片水肿消退。A组患者术后第2~3周角膜植片水肿消退,B组患者第3~4周角膜植片水肿消退,时间长于A组(P <0.001),术后第2~3周A组角膜植片水肿程度明显轻于B组(第2周P=0.002,第3周P <0.001)。术后第1、2、3个月时A组患者角膜荧光素染色评分均低于B组(均P <0.001),BUT时长高于B组(P=0.009、0.002、0.33)。A组患者中1例未按时复诊戴角膜绷带镜近5周,继发细菌感染,退出研究,术后3个月A组植片存活率93.3%(14/15);B组患者有2例1个月后出现角膜上皮无菌性缺损,另有1例术后2个月出现角膜溶解,3例均退出研究,术后3个月B组植片存活率80.0%(12/15),与A组相比差异无统计学意义(P=0.283)。结论生物工程角膜上皮化后戴角膜绷带镜可加速角膜植片水肿消退,保护角膜上皮完整性,维持眼表泪液稳定,有利于维护眼表微环境健康,对生物工程角膜术后角膜植片修复有明显促进作用。

飞秒激光在角膜移植中的应用进展

飞秒激光有高精度的切削特点,使其在角膜移植方面有着巨大的应用潜力,它可以替代机械角膜刀,根据临床需要制作不同形状的角膜植片和植床,适用于穿透性角膜移植、板层角膜移植和角膜内皮细胞移植等手术。飞秒激光的出现为改进和优化各种角膜移植手术方式提供了新的途径,本文将就飞秒激光在角膜移植方面的应用进展做一综述。

Changing trends in corneal graft surgery： a ten-year review

AIM：To review indications and corneal tissue use for penetrating and lamellar surgery between 2002 and 2011.·METHODS：The surgical reports of corneal grafts performed during 2002-2011,using tissues supplied by the Eye Bank of Piedmont（Italy）,were reviewed retrospectively.Patient demographic data,date of intervention,indication for surgery,and surgical technique used were recorded.Surgical techniques included penetrating keratoplasty（PK）,deep anterior lamellar keratoplasty（DALK）and endothelial keratoplasty（EK）.The2test was used to compare the distribution of indications and types of surgical technique used,for corneal grafts done during 2002-2006 versus those done during 2007-2011.·RESULTS：The number of corneal grafts increased by30.7%from 2002-2006 to 2007-2011（from 1567 to 2048）.Comparing the two periods,both main indications and surgical techniques changed significantly.In 2007-2011,the proportion of interventions for aphakic/pseudophakic bollous keratopathy（from 16.8%to 21.3%）,graft failure（from 16.4%to 19.1%）and Fuchs endothelial dystrophy（from 12.8%to 16.7%）all increased significantly（〈0.05）,while those for keratoconus decreased significantly（from35.6%to 27.3%;〈0.001）.In 2007-2011,the proportion of PK decreased significantly（from 92.4%to 57.2%;〈0.001）while that of EK and DALK went from 0.4%to48 30.2%（〈0.001）and from 7.2%to 12.6%（〈0.001）respectively.·CONCLUSION：During 2002-2011 the number of interventions increased significantly for corneal endothelial diseases and graft failure.The growing demand for interventions for these diseases corresponded to the widespread adoption of EK techniques.The use of DALK also increased,but more moderately than EK procedures.

Favorable Outcome in Open Globe Injuries with Low OTS Score

Purpose:Open globe eye injuries can have profound social and economic consequences. Here, we describe two cases of war and outdoor activity open globe eye injury where, despite a low OTS score,.current microsurgical technology allowed for a favorable outcome.Case report 1: A 33-year-old Libyan soldier had been treated for an open-globe grenade blast trauma to his left eye, which showed light perception and OTS score 2..He had undergone a lensectomy and PPV with silicone oil tamponade. Surgical treatment included scleral buckling,.cornea trephination, temporary Eckardt keratoprosthesis, PPV revision, intraocular lens(IOL) implantation, and corneal grafting. Six months later, his VA was improved to 20 / 70.Case report 2:.A 35-year-old man presented with a corneal laceration in his left eye from a meat skewer,.with marked hypotony and LP..After primary corneal wound closure,.Bscan ultrasonography revealed massive vitreous hemorrhage(OTS score 2). The patient underwent open cataract extraction with IOL implantation, 23 gauge PPV, laser photocoagulation of the retinochoroidal laceration, and a gas tamponade. After three weeks,.the patient underwent a 2nd 23 G PPV due to a fibrinous reaction. Six month later, the patients exhibited 20 /25 VA.Conclusion:.These cases confirm that even for patients with a low OTS and poor visual prognosis,.an up-to-date surgery protocol may achieve visual results adequate for leading an autonomous daily life.