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1.
激光诱导脉络膜视网膜静脉吻合术的临床研究 总被引:4,自引:0,他引:4
目的探讨激光诱导脉络膜视网膜静脉吻合(CRVA)术治疗非缺血型视网膜中央静脉阻塞的临床效果和安全性。方法选择非缺血型视网膜中央静脉阻塞患者34例(35只眼),在实施一系列并发症预防措施的基础上进行激光诱导CRVA术治疗。治疗前、后常规检测患者视力和眼底情况,并行荧光素眼底血管造影检查。术后患者随访3~12个月,平均6个月。结果共有28只眼(80%)CRVA术成功。治疗后1~2个月,视网膜出血基本吸收,水肿改善。其中20只眼(71%)视力提高,无视力下降者。与自然病程相比,患者眼底和视力预后明显改善,未发生严重并发症。7例(7只眼)CRVA术未成功,其中2例(2只眼)发生了严重的新生血管并发症。结论激光诱导CRVA术是治疗非缺血型视网膜中央静脉阻塞的有效方法,在对并发症采取适当预防措施的基础上行CRVA术,可显著提高CRVA术的安全性,但并不能完全避免严重新生血管并发症的发生。 相似文献
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目的:评价二步法激光诱导脉络膜视网膜静脉吻合术(laser-inducedchorioretinalvenousanastomosis,LCRVA)治疗视网膜中央静脉阻塞(centralretinalveinocclusion,CRVO)的可行性及有效性。方法:青紫蓝兔22只44眼,光动力学方法建立兔双眼的CRVO模型。任选1眼作为治疗眼,先后用倍频Nd:YAG激光器和YAG激光器分别在选定部位击破Bruch膜及相邻的静脉壁,以建立视网膜静脉与脉络膜血管之间的吻合通道;另1眼作为对照。在治疗后4mo行眼底荧光素血管造影(fundusfluoresceinangiography,FFA)以及组织病理学检查,通过组间的对比来评价LCRVA治疗CRVO的疗效。结果:有34眼(77%,15只兔双眼,4只兔单眼)一次性建立了CRVO模型。对其中的17眼行LCR-VA,每眼击射2个点。经FFA证实,有8眼(47%)中的11个点(32%)存在功能性吻合。术后4mo,通过对各组的FFA及组织病理切片对比发现,吻合成功眼的视网膜病变严重程度明显比CRVO组轻。结论:二步法LCRVA治疗CRVO是可行及有效的,旁路引流通路的建立可以延缓CRVO病情的进展。 相似文献
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慎重审视激光诱导脉络膜视网膜静脉吻合术在视网膜静脉阻塞治疗中的作用 总被引:3,自引:0,他引:3
视网膜静脉阻塞(retinal vein occluSion,Rvo)是一种常见的致盲性眼病,目前尚无满意的治疗方法。近年研究发现,采用激光诱导脉络膜视网膜静脉吻合术(laser-induced chorioretinal venous anastomosis,LCRVA)治疗非缺血型RVO的初步结果令人满意,但也伴发一些并发症,有些可严重威胁视功能。LCRVA的激光参数和治疗技术还未标准化,适应证有待规范。在没有得到随机临床试验验证之前,必须权衡这一疗法的利弊,慎重使用。 相似文献
4.
"二步法"激光诱导脉络膜视网膜静脉吻合术治疗兔视网膜中央静脉阻塞的视觉电生理变化 总被引:2,自引:0,他引:2
目的评价“二步法”激光诱导脉络膜视网膜静脉吻合术(laser-induced chori-oretinal venous anastomosis,LCRVA)治疗实验性视网膜中央静脉阻塞(central retinal veinocclusion,CRVO)的有效性。方法青紫蓝兔30只,8只(16眼)设为正常对照组,其余22只(44眼)采用光动力学方法建立双眼的CRVO模型。CRVO模型成功后,对双眼CRVO兔(15只),随机选1眼先后用倍频Nd:YAG激光器和Nd:YAG激光器分别在选定部位击破Bruch膜及相邻的静脉壁,以建立视网膜静脉与脉络膜血管之间的吻合通道;对侧眼作为CRVO对照眼;4只单眼CRVO兔中,2只为LCRVA治疗组,另2只为CRVO对照组。于术前1d,术后4h、1d、3d、1周、2周、3周、4周、8周、12周和16周各时间点,分别进行ERG检测。结果34眼(77.3%,15只兔双眼,4只兔单眼)一次性建立了CRVO模型。对其中的17眼行LCRVA,每眼击射2个点。经眼底荧光素血管造影检查证实,在8眼(47.0%)中的11个点(32.4%)存在功能性吻合。CRVO对照组较正常对照组在各时间点主要表现为ERG b波潜伏期延长,振幅下降。经LCRVA治疗后2~3周,b波振幅呈恢复趋势,与CRVO对照组有显著性差异(P<0.05)。OPs波振幅与ERG b波呈现相似变化。ERGa波变化不明显。结论兔CRVO眼的视网膜功能明显受损,LCRVA可一定程度减轻CRVO对视功能的损害。 相似文献
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激光诱导脉络膜视网膜静脉吻合术对非缺血型视网膜静脉阻塞所致黄斑水肿的疗效观察 总被引:5,自引:1,他引:5
目的 观察激光诱导脉络膜视网膜静脉吻合术治疗非缺血型视网膜静脉阻塞(retinal vein occlusion,RVO)所致黄斑水肿的疗效。 方法 非缺血型RVO患者37例37只黄斑水肿眼均使用氪红激光诱导脉络膜视网膜静脉吻合,吻合术后随访6~12个月(平均随访9个月),对比分析建立和未建立脉络膜视网膜静脉吻合的眼治疗前后视力、眼底、荧光素眼底血管造影(fundus fluorescein angoigraphy, FFA)、中心5°视网膜光敏感度的改变。 结果 37只眼中,激光治疗后2个月内有18只眼建立脉络膜视网膜静脉吻合,成功率48.6%。建立与未建立脉络膜视网膜静脉吻合的眼,治疗前后平均最佳矫正视力差异有显著性意义(P<0.001)。建立吻合的眼,中心5°光敏感度与治疗前相比有明显提高(t=2.910, P<0.005);FFA显示16只眼黄斑水肿消失或减轻,2只眼黄斑囊样水肿仍存在。未建立吻合的眼,中心5°光敏感度与治疗前相比有所下降(t=1.928, P<0.05),FFA显示黄斑水肿加重。 结论 RVO所致黄斑水肿未发展至囊样变性之前,激光诱导建立脉络膜视网膜静脉吻合可使RVO所致黄斑水肿消退或减轻,从而改善视功能。 (中华眼底病杂志,2002,18:10-12) 相似文献
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激光诱导脉络膜视网膜静脉吻合术治疗实验性视网膜分支静脉阻塞的激光能量选择 总被引:2,自引:0,他引:2
目的
观察不同激光能量诱导脉络膜视网膜静脉吻合(laser induced chorioretinal venous anastomosis)治疗实验性视网膜分支静脉阻塞(branch retina vein occlusion,BRVO)的成功率和组织学损伤情况,以确定最佳的激光治疗能量。
方法
40只有色家兔的80只眼随机分为4组,每组10只兔20只眼,采用光动力方法建立BRVO模型,24 h后以50 μm光斑、0.1 s的红色氪离子激光的不同能量(A组400 mW、B组600 mW、C组800 mW和D组1 000 mW)诱导脉络膜视网膜静脉间的吻合,在实验后第1、2、4、6、8周时进行眼底照相和荧光素眼底血管造影检查,并在实验结束时(施行静脉吻合术后第8周末)摘除眼球进行组织学检查。
结果
80只兔眼均成功建立了BRVO模型。A组无一例诱导脉络膜视网膜静脉吻合成功,激光对周围视网膜、脉络膜的损伤最轻,Bruch膜基本完整;B、C组诱导成功率分别为15%和55%,激光对周围组织的损伤中等;D组诱导成功率为80%,激光对周围组织的损伤最重。4组之间比较,诱导成功率差异有非常显著性意义(P=0.001);其中C组诱导静脉吻合成功率明显高于B组(PBC=0.008);A组和B组、C组和D组之间比较,成功率的差异没有显著意义(PAB=0.072、PCD=0.091)。
结论
红色氪离子激光诱导实验性BRVO兔眼脉络膜视网膜静脉吻合术的最佳激光能量设置为:能量800 mW,光斑直径为50 μm,时间0.1 s。 (中华眼底病杂志,2002,18:13-16) 相似文献
观察不同激光能量诱导脉络膜视网膜静脉吻合(laser induced chorioretinal venous anastomosis)治疗实验性视网膜分支静脉阻塞(branch retina vein occlusion,BRVO)的成功率和组织学损伤情况,以确定最佳的激光治疗能量。
方法
40只有色家兔的80只眼随机分为4组,每组10只兔20只眼,采用光动力方法建立BRVO模型,24 h后以50 μm光斑、0.1 s的红色氪离子激光的不同能量(A组400 mW、B组600 mW、C组800 mW和D组1 000 mW)诱导脉络膜视网膜静脉间的吻合,在实验后第1、2、4、6、8周时进行眼底照相和荧光素眼底血管造影检查,并在实验结束时(施行静脉吻合术后第8周末)摘除眼球进行组织学检查。
结果
80只兔眼均成功建立了BRVO模型。A组无一例诱导脉络膜视网膜静脉吻合成功,激光对周围视网膜、脉络膜的损伤最轻,Bruch膜基本完整;B、C组诱导成功率分别为15%和55%,激光对周围组织的损伤中等;D组诱导成功率为80%,激光对周围组织的损伤最重。4组之间比较,诱导成功率差异有非常显著性意义(P=0.001);其中C组诱导静脉吻合成功率明显高于B组(PBC=0.008);A组和B组、C组和D组之间比较,成功率的差异没有显著意义(PAB=0.072、PCD=0.091)。
结论
红色氪离子激光诱导实验性BRVO兔眼脉络膜视网膜静脉吻合术的最佳激光能量设置为:能量800 mW,光斑直径为50 μm,时间0.1 s。 (中华眼底病杂志,2002,18:13-16) 相似文献
8.
不同参数激光诱导脉络膜视网膜静脉吻合 总被引:1,自引:0,他引:1
目的 探讨不同激光参数、不同击射部位对脉络膜 视网膜静脉吻合形成的影响。方法 在视网膜分支静脉阻塞模型上 ,以不同参数在不同部位诱导吻合支的形成 ,以荧光素眼底血管造影、连续组织切片观察吻合支的建立及其周围组织反应情况。结果 功率 90 0、12 0 0、15 0 0、180 0mW诱导吻合支的成功率为 0、2 0 .83%、4 5 .83%、6 2 .5 0 % (P=0 .0 0 1) ;直径 5 0、10 0 μm诱导吻合支的成功率分别为 4 3.75 %、2 0 .83% (P =0 .0 16 ) ;击射部位距视盘边缘 2DD与 3DD对吻合支形成的影响无统计学意义 (P =0 .732 ) ,2DD与4DD间 (P =0 .0 2 8) ,3DD与 4DD间 (P =0 .0 2 3)差异均有显著性 ;12 0 0、15 0 0mW诱导的吻合支周围组织损伤较轻 ,180 0mW诱导的吻合支周围组织损伤较重。结论 功率、光斑直径是影响脉络膜 视网膜静脉吻合形成的 2个主要因素 ,其中功率起决定性作用 ;5 32nm激光诱导吻合支形成的最适功率和直径为 12 0 0~ 15 0 0mW、5 0 μm ;击射部位以距视盘 3DD处最佳 相似文献
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缺血性视网膜中央静脉阻塞经全视网膜光凝术后视网膜血管的收缩上海第二医科大学附属瑞金医院眼科原艳波,王康孙全视网膜光凝术目前仍被认为是治疗缺血性视网膜中央静脉阻塞的有效方法,它能有效预防虹膜和房角新生血管的产生,预防新生血管性青光眼的发生,其作用机理可... 相似文献
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Vitreous hemorrhage and fibrovascular proliferation after laser-induced chorioretinal venous anastomosis 下载免费PDF全文
AIM: To describe a case in which vitrectomy was required for vitreous hemorrhage and fibrovascular proliferation after laser-induced chorioretinal venous anastomosis (LCVA) for non-ischemic central retinal vein occlusion (CRVO).
METHODS: Observational case report.
RESULTS: A 72-year-old man complained of central scotoma in the left eye, and was diagnosed as suffering from non-ischemic CRVO. LCVA was performed in another hospital. Although favorable visual function was briefly maintained postoperatively,severe vitreous hemorrhage developed in his left eye, necessitating vitrectomy.
CONCLUSION: Considering that LCVA carries a risk of serious complications, we must apply this treatment with caution, especially in ethnic groups, such as the Japanese, in whom pigmentation reacts to photocoagulation excessively. 相似文献
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目的 评价激光脉络膜视网膜静脉吻合 (CRVA )术后≥ 2年的视网膜静脉阻塞患者的疗效和并发症。方法 选择 2 0例 2 0眼 ,术后 2个月和末次随访 2个时间点 ,观察吻合功能、视力、眼底、荧光血管造影及吻合点并发症。结果 吻合成功 11眼 ( 11/2 0 ,5 5 % ) 16点 ( 16/4 8,3 3 3 % ) ,吻合未成功 9眼 ( 9/2 0 ,45 % ) ,两次随访结果一致。视力 :吻合成功组提高 7例 ,不变 4例 ;未成功组提高 1例 ,不变 3例 ,下降 5例 (P <0 0 5〉。吻合点远期并发症包括脉络膜视网膜新生血管5处 ( 5 /4 8,10 4% ) ,视网膜前纤维膜 5处 ( 5 /4 8,10 4% ) ,视网膜前出血 1处 ( 1/4 8,2 1% )。结论 激光CRVA术可有效建立脉络膜视网膜静脉吻合 ,改善视力 ,吻合疗效持久 ;但术后远期仍应密切观察并发症的发生 相似文献
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Laser-induced chorioretinal venous anastomosis for non-ischaemic hemi-central vein occlusion 总被引:2,自引:0,他引:2
Purpose : To assess the effectiveness and complications of laser‐induced chorioretinal venous anastomosis performed on eyes with non‐ischaemic hemi‐central retinal vein occlusions (hemi‐CRVO). Methods : Fourteen eyes with a hemi‐CRVO which reduced the visual acuity to 6/24 or less were treated with argon laser photocoagulation in an attempt to create a chorioretinal venous anastomosis between a retinal vein and the choroidal circulation. Results : Laser anastomoses were successfully created in six eyes (43%) and required a mean of 1.8 attempts in each eye. Of the eyes that developed an anastomosis, four had significant visual improvement. The distal retinal venous segment closed off in five eyes and these had prophylactic segmental argon pan‐retinal photocoagulation performed. Two eyes had localized fibrovascular proliferation. No permanent vision‐threatening complications were observed in any of the 14 eyes over the follow‐up period. Conclusions : Successful anastomosis between the retinal and choroidal circulation in eyes with hemi‐vein occlusions may reduce macular oedema and improve vision. Complications of the technique are significant and a randomized clinical trial is due to commence which may clarify the suitability of this treatment. 相似文献
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Kenneth C S Fong FRCOphth Chris Barry MMedSci Ian L McAllister FRANZCO 《Clinical & experimental ophthalmology》2009,37(5):485-489
Purpose: To describe the use of intravitreal bevacizumab followed by sectorial retinal photocoagulation to treat the neovascular complications of laser-induced chorioretinal anastomosis (L-CRA) for nonischaemic central retinal vein occlusion (CRVO).
Methods: Prospective interventional case series of three patients with nonischaemic CRVO who were treated with L-CRA. Patients were followed up every 2 weeks after the laser treatment. If neovascularization occurred at the site of the anastomosis, intravitreal bevacizumab (1.25 mg) was injected followed by laser photocoagulation to areas of retinal ischaemia and the area of retina anterior to the L-CRA 1 week later. Fluorescein angiography was performed to confirm the presence of neovascularization. Best-corrected visual acuity measurements were performed at every visit.
Results: Three patients (one woman, two men) with a mean age of 76.3 years developed neovascularization at the L-CRA site and underwent treatment as described with a mean follow-up time of 7 months. The neovascularization developed within 1 month after the laser anastomosis in all three cases. All patients only required one intravitreal bevacizumab injection to control the neovascularization. No complications of the intravitreal injections were noted.
Conclusions: Intravitreal bevacizumab appears to be an effective tool in the immediate control of neovascularization following L-CRA for nonischaemic CRVO. This appears to cause immediate regression of the neovascular frond and allows time for the laser, which is applied subsequently to have its effect. 相似文献
Methods: Prospective interventional case series of three patients with nonischaemic CRVO who were treated with L-CRA. Patients were followed up every 2 weeks after the laser treatment. If neovascularization occurred at the site of the anastomosis, intravitreal bevacizumab (1.25 mg) was injected followed by laser photocoagulation to areas of retinal ischaemia and the area of retina anterior to the L-CRA 1 week later. Fluorescein angiography was performed to confirm the presence of neovascularization. Best-corrected visual acuity measurements were performed at every visit.
Results: Three patients (one woman, two men) with a mean age of 76.3 years developed neovascularization at the L-CRA site and underwent treatment as described with a mean follow-up time of 7 months. The neovascularization developed within 1 month after the laser anastomosis in all three cases. All patients only required one intravitreal bevacizumab injection to control the neovascularization. No complications of the intravitreal injections were noted.
Conclusions: Intravitreal bevacizumab appears to be an effective tool in the immediate control of neovascularization following L-CRA for nonischaemic CRVO. This appears to cause immediate regression of the neovascular frond and allows time for the laser, which is applied subsequently to have its effect. 相似文献
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目的 进行实验性激光诱导脉络膜视网膜静脉吻合术(CRVA),探讨该治疗方法的可行性和并发症的发生原因。方法 用光动力学法对5只正常狗做分支静脉阻塞模型,然后做激光CRVA治疗,一次治疗失败者重复治疗。用眼底荧光血管造影和病理研究方法分析治疗效果和并发症的发生情况。结果 5只狗的9只眼均吻合成功。吻合成功的激光能量为2-2.5W。能量小于2.3W常不能击穿视网膜静脉而使吻合失败。在同一部位多次治疗产生较大的激光瘢痕和局限性视网膜增殖膜。结论 CRVA术能产生有效的脉络膜视网膜静脉吻合血管,避免在同一治疗部位重复治疗有可能减少并发症的发生。 相似文献
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目的:了解视网膜静脉阻塞(RVO)激光治疗后发生玻璃体出血的原因。方法:回顾分析2年来门诊11例(11眼,CRVO:2眼;BRVO:9眼)激光后的视网膜静脉阻塞发生玻璃体出血的病例。结果:11例RVO中:少量玻璃体出血5例;中-多量玻璃体出血6例,其中2例作玻璃体切除术,其余激光治疗后出血停止而治愈。由初次激光治疗到玻璃体出血时间6月-11年,再次激光或/和手术后视力均有改善。结论:不规范或不完全的视网膜光凝是导致RVO激光治疗发生玻璃体出血的主要原因,规范的视网膜光凝、定期随诊和眼底荧光造影是保证疗效的关键。 相似文献