Combined phacoemulsification and Ahmed valve glaucoma drainage implant: a retrospective case series

PURPOSE: To report on the efficacy and safety of combined phacoemulsification and an Ahmed valve glaucoma drainage implant with respect to visual acuity improvement, intraocular pressure (IOP) control, and requirement for antiglaucoma medication. METHODS: A retrospective chart review was conducted of 41 eyes (31 patients) with coexisting visually significant cataracts and uncontrolled glaucoma who had combined phacoemulsification and Ahmed valve implantation. The outcome measures were: visual acuity, IOP, antiglaucoma medication requirements, and intra- and post-operative complications. Success was categorized as absolute (IOP<21 mmHg without the need for antiglaucoma medication) and relative (IOP<21 mmHg with one or more antiglaucoma medications). Failure was considered to be an IOP<6 mmHg or IOP>21 mmHg on maximally tolerated medications or any devastating complication. RESULTS: The mean patient age was 67.3+/-5.9 years old. The mean visual acuity improved from 0.73+/-0.5 to 0.16+/-0.16 (p=0.000). The mean IOP decreased from 28.2+/-3.1 to 16.8+/-2.1 (p=0.000, 40.4%), while the number of antiglaucoma medication decreased from 2.6+/-0.66 to 1.2+/-1.4 (p=0.000). The absolute and relative success rates were 56.1% and 31.7%, respectively; 5 eyes (12.2%) were considered failures. There were no intraoperative complications; postoperative complications occurred in 8 eyes (19.5%). A hypertensive phase was detected in 12 (29.3%) eyes. CONCLUSIONS: Combined phacoemulsification and Ahmed valve glaucoma drainage implantation is a safe and effective alternative to phacotrabeculectomy in patients with coexisting cataract and refractory glaucoma.     

Pars plana Ahmed implantation combined with 23-gauge vitrectomy for refractory neovascular glaucoma in diabetic retinopathy

Purpose

To evaluate the efficacy and safety of a pars plana Ahmed valve implantation combined with 23-gauge sutureless vitrectomy in the treatment of patients with medically uncontrolled neovascular glaucoma (NVG) in proliferative diabetic retinopathy (PDR).

Methods

The authors retrospectively reviewed the records of 11 consecutive patients with refractory NVG in PDR who underwent a 23-gauge sutureless vitrectomy combined with pars plana placement of an Ahmed valve implant. Control of intraocular pressure (IOP), pre- and postoperative best-corrected visual acuity and the development of intra- and postoperative complications were evaluated during the follow-up.

Results

The mean follow-up was 12.2 months (range, 8 to 25 months). Mean preoperative IOP was 35.9 ± 6.3 mmHg and mean postoperative IOP at the last visit was 13.3 ± 3.2 mmHg. Control of IOP (8 to 18 mmHg) was achieved in all patients, but 91% (10 of 11 patients) needed antiglaucoma medication (mean number of medications, 1.2 ± 0.6). Postoperative visual acuity improved in 11 eyes, and the logarithmically to the minimum angle of resolution mean visual acuity in these eyes improved from 1.67 ± 0.61 to 0.96 ± 0.67. The complications that occurred were transient hypotony in one case, transitory hypertension in two cases, and postoperative vitreous hemorrhage which spontaneously cleared in two cases.

Conclusions

We suggest the combination of 23-gauge pars plana vitrectomy and Ahmed valve implantation is safe and effective in PDR patients with refractory NVG.     

Ahmed青光眼阀植入治疗难治性青光眼

目的：探讨Ahmed青光眼阀植入治疗难治性青光眼的临床疗效。 方法：回顾性研究我院Ahmed青光眼阀植入术治疗21例21眼难治性青光眼的临床疗效并进行总结分析。 结果：术前平均眼压为44.6±7.2mmHg,术后6mo末次随访平均眼压15.4±5.3mmHg;视力提高4眼,无改变14眼,降低3眼;手术并发症主要包括术后前房形成迟缓2眼、持续高眼压1眼、引流管暴露1眼、角膜失代偿1眼、引流盘纤维包裹3眼;手术成功率为86％。 结论：Ahmed青光眼阀植入术是治疗难治性青光眼有效和安全的方法。     

Ahmed青光眼阀植入联合视网膜光凝或冷凝治疗新生血管性青光眼

目的:探讨Ahmed青光眼阀植入联合视网膜光凝或冷凝术对新生血管性青光眼治疗的临床效果。方法:选取4a来住院的新生血管性青光眼56例58眼,其中视网膜中央静脉阻塞25例25眼,糖尿病性视网膜病变21例23眼,视网膜血管炎5例5眼,颈动脉狭窄4例4眼,视网膜分支静脉阻塞1例1眼,平均年龄50.6岁,均行Ahmed青光眼阀植入联合视网膜光凝或冷凝治疗,其中47眼于手术前后行全视网膜光凝,11眼于手术中联合周边视网膜冷凝术,平均随访18.0±6.2mo,观察手术前后视力和眼压的变化以及术后并发症的情况,结果进行统计学分析。结果:视力:术后43眼有不同程度地提高,15眼无变化,无视力下降者。眼压:随访6mo时眼压由术前49.56±8.25mmHg降至17.86±5.25mmHg,总成功率为85%;随访12mo时,眼压由术前50.25±7.18mmHg降至18.80±6.81mmHg,总成功率为78%;24mo以上随访19眼,眼压由术前51.05±8.10mmHg降至20.12±7.01mmHg,总成功率为74%,手术前后眼压比较差异有非常显著性。并发症主要有前房出血、前房延缓形成、引流管内口堵塞、引流盘纤维包裹,经术后处理均得到了恢复。结论:Ahmed青光眼阀植入联合视网膜光凝或冷凝是治疗新生血管性青光眼安全有效的方法之一。     

睫状体平坦部青光眼阀植入联合玻璃体切除全视网膜光凝治疗新生血管性青光眼的临床观察

目的:评估平坦部青光眼阀植入联合玻璃体切除全视网膜光凝术治疗继发性闭角型新生血管性青光眼(neovascular glaucoma,NVG)的临床效果。方法:对2007-05/2008-08在我科治疗的连续伴玻璃体积血的继发性闭角型NVG患者14例16眼行玻璃体切除视网膜光凝联合平坦部青光眼阀植入术并随访观察。结果:术后追踪随访3～13(平均7.3)mo。16只术眼中,除3眼外视力均不同程度提高。经秩和检验术前和术后两组相差显著。眼压由术前用降压药后的38～67(平均48.5±9.3)mmHg降至15.6～25.3(平均16.5±6.9)mmHg,两组相差有统计学意义。4眼出现术后并发症。其中2眼角膜水肿、前房炎症。1眼脉络膜脱离。经药物对症治疗后缓解。1眼出现医源性白内障。结论:玻璃体切除全视网膜光凝联合平坦部青光眼阀植入术是有效和安全的。特别是对于伴浅前房的NVG患者是一种新的治疗选择。     

Ahmed青光眼阀植入术治疗难治性青光眼的疗效观察

目的 观察Ahmed青光眼阀植入术治疗难治性青光眼的临床疗效及并发症.方法 32例(32眼)难治性青光眼患者应用Ahmed青光眼阀植入术进行治疗,观察患者术后眼压、视力及并发症,并与术前进行比较.结果 本组患者手术成功率为87.50％,其中新生血管性青光眼患者术后成功率为85.71％,其他类型青光眼患者成功率为90.91％.术前眼压为(45.3±11.3)mmHg(1kPa =7.5mmHg),术后最后一次随访眼压(16.57±5.31)mmHg,差异有统计学意义(t=-13.017,P＜0.05).术后视力提高14例,视力不变16例,视力下降2例.术后并发症包括短暂性浅前房7例,前房积血4例,脉络膜脱落3例,引流盘周围纤维包裹2例.结论 Ahmed青光眼阀应用于治疗难治性青光眼疗效较好,并发症较少.     

Ahmed引流阀植入联合玻璃体腔注射Bevacizumab治疗NVG

目的：观察Ahmed引流阀植入联合玻璃体腔注射bevacizumab(贝伐珠单抗)治疗新生血管性青光眼(neovascular glaucoma,NVG)的疗效。

方法：对22例22眼新生血管性青光眼患者先进行玻璃体腔注射bevacizumab 0.1mL(2.5mg),待虹膜新生血管消退后行Ahmed青光眼阀门植入术。术后观察视力、眼压、虹膜新生血管消退情况、术中及术后并发症,随访6～36(平均24)mo。

结果：玻璃体腔注药后1wk内22眼虹膜新生血管均有不同程度消退,Ahmed引流阀植入术后随访22眼中仅有3眼联合使用1～3种抗青光眼药物,眼压控制在21mmHg之内,1眼因眼压失控而行睫状体光凝术(810激光),其余18眼均无需加用抗青光眼药物眼压控制在正常范围内,最后一次随访,平均眼压15.59±3.21mmHg,与术前平均眼压(45.36±8.13mmHg)相比,差异有统计学意义(P<0.05)。视力提高者9眼(41%),保持术前视力者13眼。全部病例在玻璃体腔注射bevacizumab及Ahmed引流阀植入术中术后均未观察到严重手术并发症。

结论：Ahmed引流阀植入联合玻璃体腔注射bevacizumab治疗NVG安全有效,手术成功率高,并发症少,有利于保护残留视功能。     

Ahmed引流阀植入联合玻璃体腔注射Avastin治疗NVG

观察Ahmed阀植入联合玻璃体腔注射avastin治疗新生血管性青光眼(neovascular glaucoma, NVG)的疗效。 方法：对NVG患者20例20眼先行玻璃体腔注射avastin 0.1mL(2.5mg),待虹膜新生血管消退后行Ahmed青光眼引流阀植入术。术后观察视力、眼压、虹膜新生血管消退情况、术中及术后并发症,随访6～36(平均24)mo。 结果：玻璃体腔注射avastin后1wk内20眼虹膜新生血管均不同程度消退。Ahmed引流阀植入术后最后一次随访20眼中仅有3眼联合1～3种抗青光眼药物眼压≤21mmHg,1眼因眼压无法控制而行睫状体冷凝术（术后眼压控制）,其余16眼无需加用抗青光眼药物眼压控制在正常范围。最后一次随访,平均眼压13.62±3.81mmHg,与术前平均眼压（44.17±16.17mmHg）比较,差异有统计学意义(t=11.028,P=0.000)。视力提高者8眼（40％）,保持不变者12眼。全部病例在玻璃体腔注射avastin及Ahmed引流阀植入术中术后均未观察到严重手术并发症。 结论：Ahmed引流阀植入联合玻璃体腔注射avastin治疗NVG安全有效,手术成功率高,并发症少,有利于保护残留的视功能,但其长期疗效还需进一步观察,同时要注意原发病的处理。 关键词：新生血管性青光眼;Ahmed引流阀;玻璃体腔注射;avastin     

Ahmed valve implantation for refractory glaucoma following pars plana vitrectomy

PURPOSE: To evaluate the effectiveness of Ahmed valve implantation for refractory glaucoma following pars plana vitrectomy. METHODS: Seventeen eyes of 15 patients suffering from secondary glaucoma following pars plana vitrectomy underwent Ahmed valve implantation. All the eyes were in critical condition, and intraocular pressure could not be controlled with anti-glaucoma medications. Success was characterized by an intraocular pressure less than 22 mmHg and greater than 6 mmHg, regardless of anti-glaucoma medication usage. RESULTS: The total success rate was 83.4% at 6 months and 76.4% at the final visit. The reduction in intraocular pressure and the number of medications used postoperatively were both statistically and clinically significant (p<0.005). Postoperative complications included: transiently increased intraocular pressure, transient hyphema, early postoperative hypotony, choroidal detachment, malposition of the valve tip, and phthisis bulbus. CONCLUSIONS: Ahmed valve implantation is a safe and effective method for refractory glaucoma following vitrectomy.     

透明质酸钠联合Ahmed青光眼阀治疗难治性青光眼

目的:探讨透明质酸钠联合青光眼阀治疗难治性青光眼的中远期疗效,探讨手术并发症的预防和处理。方法:采用透明质酸钠联合青光眼阀治疗难治性青光眼27例27眼,术后随访6～22mo。结果:术前眼压46.70±9.31mmHg,术后降至20.60±7.31mmHg,视力有不同程度的提高。术后并发症1例阀门管位置欠佳,经调整后得到改善,2例前房积血,用药后吸收。结论:使用透明质酸钠联合Ahmed青光眼阀植入,可以有效地降低难治性青光眼的眼压,减少术后并发症的发生。     

Pars plana Ahmed valve implant and vitrectomy in the management of neovascular glaucoma.

BACKGROUND AND OBJECTIVE: To evaluate the efficacy and safety of the pars plana Ahmed glaucoma valve (New World Medical, Inc., Rancho Cucamonga, CA) implant combined with pars plana vitrectomy and panretinal photocoagulation for the management of neovascular glaucoma in patients with vitreous hemorrhage. PATIENTS AND METHODS: The records of 18 eyes of 17 consecutive patients with neovascular glaucoma who had undergone pars plana vitrectomy and pars plana Ahmed valve implant were evaluated. The patients were observed for a mean time of 14.2 months (range, 6 to 28 months). RESULTS: Mean preoperative intraocular pressure with oral and two or three topical antiglaucoma medications was 53.3 +/- 10 mm Hg, and mean postoperative intraocular pressure without oral antiglaucoma medications was 16.3 +/- 7.1 mm Hg (P < .0001) at the final visit. Overall success rate was 72.2%, defined as an intraocular pressure of 5 to 21 mm Hg with or without antiglaucoma medication. A postoperative hypertensive phase occurred in 7 patients (38.8%), of which all but one responded to medical therapy. Visual acuity was stabilized or improved in 77.7% of the eyes. There was one case of each of the following adverse events: mild vitreous cavity hemorrhage, hypotony, choroidal effusion, epiretinal membrane, corneal edema, and corneal ulcer. Two cases developed phthisis bulbi and lost light perception. CONCLUSIONS: Pars plana vitrectomy and Ahmed valve implantation seems to be a viable surgical modality in the management of neovascular glaucoma and coexisting posterior segment pathology with a relatively low rate of serious permanent postoperative complications.     

Ahmed FP-7青光眼引流阀治疗难治性青光眼的18个月效果

目的 评估Ahmed FP-7青光眼阀植入治疗难治性青光眼的效果。设计 回顾性病例系列。研究对象 哈尔滨医科大学附属第二医院难治性青光眼患者45例46眼。方法 对以上患者行Ahmed FP-7青光眼阀植入,术后平均随访（10.7±7.3）个月。不用降眼压药眼压≤21 mm Hg定义为成功。主要指标 眼压、视力、手术后并发症。结果 术后18个月成功率为74.1 %;术前平均眼压（45.8±12.1）mm Hg,术后18个月为（17.6±5.3）mm Hg （P<0 .001）。视力提高 9眼,无改变35眼。手术并发症包括引流盘纤维包裹9眼（19.6%）、脉络膜脱离6眼（13.0%）、前房出血5眼（10.9%）、引流管暴露2眼（4.3%）。结论 18个月的随访显示,Ahmed FP-7青光眼阀植入术可控制3/4的难治性青光眼患者的眼压。（眼科,2013,22：253-256）     

应用MMC的Ahmed青光眼阀植入术联合全视网膜光凝治疗NVG

目的:探讨应用丝裂霉素C的Ahmed青光眼阀植入联合全视网膜光凝治疗新生血管性青光眼的临床疗效。方法:新生血管性青光眼26例26眼,应用丝裂霉素C的Ahmed青光眼阀植入术联合全视网膜光凝治疗。结果:随访12mo,成功:16例眼压<21mmHg(61.54%),无明显眼部刺激症状。术前眼压平均49.78±14.17mmHg,术后眼压下降到平均18.45±8.91mmHg。末次复诊视力提高14眼(53.85%),视力不变12眼,无视力下降或丧失者。26眼中虹膜新生血管全部消退21眼,部分消退5眼。术后并发症主要有:浅前房6眼(23.08%),前房少量积血3眼(11.54%),引流管内口堵塞2眼(7.69%),引流盘纤维包裹1眼(3.85%)。结论:应用丝裂霉素C的Ahmed青光眼阀植入联合全视网膜光凝术治疗新生血管性青光眼,既能及时降低眼压,又能拯救或提高视力,是治疗新生血管性青光眼的一种安全而有效的方法。     

Surgical outcomes of combined phacoemulsification and glaucoma drainage implant surgery for Asian patients with refractory glaucoma with cataract

PURPOSE: To examine the safety and efficacy of combined phacoemulsification and glaucoma drainage implant surgery in providing reduction of intraocular pressure (IOP) and visual rehabilitation in eyes with refractory glaucoma and cataract. DESIGN: Interventional case series. METHODS: A retrospective chart review was performed on all subjects who underwent combined phacoemulsification with intraocular lens implantation and glaucoma drainage implant surgery by a single surgeon at the National University Hospital, Singapore. The implants used were the 185 mm2 Ahmed glaucoma valve and the 350 mm2 Baerveldt glaucoma implant. In terms of IOP, a complete success was defined as IOP of between 6 to 21 mm Hg without medication, qualified success as IOP between 6 to 21 mm Hg with one or more medication, and failure as a sustained IOP of >21 mm Hg or <6 mm Hg with or without one or more medication on two or more visits. RESULTS: A total of 32 combined phacoemulsification and glaucoma implant surgeries in 32 patients was performed. All patients were of Asian origin, and the mean age was 58 +/- 16 years (range, 20-78 years). The Baerveldt glaucoma implant and Ahmed glaucoma valve implant were inserted in 16 eyes each. With a mean follow-up of 13 +/- 5 months (range 6 to 22 months), IOP was reduced from a mean of 28.0 +/- 11.5 mm Hg to 15.2 +/- 6.0 mm Hg postoperatively (P <.0001), whereas the number of antiglaucoma medications decreased from a mean of 2.4 +/- 1.4 to.3 +/-.7 (P <.0001) at last follow-up. Overall, there were 24 eyes (75%) that were classified as complete successes, 4 eyes (12.5%) that were qualified successes, and 4 eyes that failed (12.5%). Twenty-three eyes (72%) had improvement of visual acuity, while only one eye had a loss of more than 1 line of Snellen acuity. There was no case that encountered an intraoperative complication, and postoperative complications occurred in 12 eyes (38%), the most common of which was hypotony (in six eyes, 19%). CONCLUSION: For subjects with refractory glaucoma and cataract, combined phacoemulsification and glaucoma drainage implant surgery provide good visual rehabilitation and control of IOP, with low incidence of complications.     

穿刺巩膜隧道植入Ahmed青光眼阀治疗难治性青光眼的疗效

目的:观察用23G针头直接穿刺制作巩膜隧道的方式植入Ahmed青光眼阀(Ahmed glaucoma valve,AGV)治疗难治性青光眼的临床疗效及并发症。方法:观察44例44眼难治性青光眼患者,应用23G针头直接穿刺制作巩膜隧道,行青光眼阀植入术进行治疗。观察患者术后眼压、视力、并发症,并与术前进行对比。结果:本组患者成功率84.1%。术前眼压:52.1±10.1mm Hg,最后一次随访眼压15.6±6.9mm Hg。视力提高者11眼,视力无改变者27眼,视力降低者6眼。并发症包括:浅前房4例,脉络膜脱离3例,引流管移位1例,前房积血6例,引流管阻塞1例,脉络膜驱逐性出血1例,引流盘包裹5例。结论:直接穿刺巩膜隧道的方法植入青光眼阀,手术操作简单可行,避免了制瓣及异体巩膜移植,并简化了手术操作,防止术后房水管周渗漏,术后浅前房发生率低,为切实可行的手术方法。     

前部视网膜冷凝联合玻璃体切除术治疗中早期NVG

摘要目的:探讨前部视网膜冷凝联合玻璃体切除术治疗中早期新生血管青光眼(neovascular glaucoma,NVG)的临床效果。方法:采用前部视网膜冷凝联合玻璃体切除术治疗中早期新生血管青光眼31例31眼,术中全视网膜光凝。结果:患者31眼,术前眼压41.1±6.2mmHg,术后观察3~25(平均9.8)mo,眼压22.6±6.9mmHg,术前术后眼压差别具有统计学意义(P=0.002);25例眼压控制正常,眼压19.8±2.4mmHg,6例眼压34±8.2mmHg,其中3例局部药物治疗眼压控制正常,2例行二次手术,玻璃体腔青光眼阀植入术后,眼压控制满意,1例无效,患眼无光感,疼痛,行眼内容摘除术。20眼视力有不同程度的提高,5例视力不变,5例视力下降,1例无光感。30例虹膜面新生血管绝大部分或完全消退,角膜透明,前房无积血,所有病例眼部疼痛消失或明显缓解。结论:前部视网膜冷凝联合玻璃体切除术可消退虹膜面的新生血管,有利于术后眼压的控制,恢复部分视力,为中早期新生血管性青光眼提供了一个行之有效的治疗方案。     

Ahmed引流阀植入治疗多次小梁切除术失败后的难治性青光眼

目的：观察 Ahmed 青光眼引流阀植入治疗经多次(≥2次)小梁切除术失败后的难治性青光眼的疗效及安全性。方法：对36例36眼经多次小梁切除术后眼压仍失控的患者行 Ahmed 青光眼引流阀植入术,观察手术前后眼压、最佳矫正视力以及术后并发症。所有患者至少随访12mo。结果：术前平均眼压为35.20依7.28mmHg,术后1、2wk,1、3、6、12mo 平均眼压分别降至10.15依3.34、11.23依3.56、15.63依5.72、17.17依5.47、17.73依6.23、19.76依5.43mmHg,与术前眼压相比差异均有统计学意义( t =12.643、11.837、10.324、8.839、8.462、8.046,均 P <0.05)。术后1a 的视力与术前比较无统计学差异(Z =-0.420,P>0.05)。术后1a 时完全成功率为78%,条件成功率为92%。术后早期并发症主要为浅前房、低眼压以及前房积血,经过治疗均自行恢复,晚期并发症为引流管暴露和滤过泡包裹,1例患者出现严重的角膜内皮失代偿。
　　结论：Ahmed 青光眼引流阀植入治疗多次小梁切除术后失败的难治性青光眼是一种有效的方法,但应充分认识并预防各种术后并发症的发生。     

AGV植入联合MMC及视网膜光凝治疗NVG

目的：观察 Ahmed青光眼阀(Ahmed glaucoma valve,AGV)植入术中应用丝裂霉素C(MMC)联合视网膜光凝治疗新生血管性青光眼(neovascular glaucoma,NVG)的临床疗效。

方法：回顾性分析行AGV植入术中应用MMC联合视网膜光凝术治疗的41 例41眼NVG患者临床资料,观察患者眼压变化、视力变化、手术成功率及并发症情况。

结果：患者术前平均眼压49.8±4.3mmHg,术后1,3,6,12mo分别为18.30±4.50,19.40±5.37,18.45±4.60,17.85±3.66mmHg。末次随访平均眼压20.25±4.2mmHg,与术前眼压相比差异均具有统计学意义(P<0.05)。随访6～24mo,手术成功率为93% ,其中完全成功36眼(88%),部分成功2眼(5%),失败3眼(7%)。手术前后视力差异无统计学意义(P>0.05)。术后常见并发症为术后早期低眼压4眼(10%); 术后浅前房1眼(2%); 前房少量出血3眼(7%); 引流管内口阻塞1眼(2%)。

结论：AGV植入术中应用MMC联合视网膜光凝治疗NVG临床疗效显著,可以有效降低NVG患者的眼压。     

Management of uveitic glaucoma with Ahmed glaucoma valve implantation

OBJECTIVE: To evaluate the safety and efficacy of Ahmed glaucoma valve implantation for the management of glaucoma associated with chronic uveitis. DESIGN: Retrospective, noncomparative case series. PARTICIPANTS: Nineteen patients (21 eyes) with chronic uveitis underwent Ahmed glaucoma valve implantation for uncontrolled glaucoma between 1995 and 1998. INTERVENTION: All patients had their uveitis controlled before surgery via immunomodulatory therapy. Ahmed glaucoma valve implantation was performed. Immunosuppression was continued in the early postoperative period for strict control of inflammation. MAIN OUTCOME MEASURES: Control of intraocular pressure (IOP). A secondary outcome measure was the number of antiglaucoma medications required to achieve the desired IOP. Visual acuity and complications associated with the surgery were monitored. RESULTS: The postoperative follow-up averaged 24.5 months. At the most recent visit, all 21 eyes had IOPs between 5 and 18 mmHg. The average pressure reduction after Ahmed glaucoma valve implantation was 23.7 mmHg. The average number of antiglaucoma medicines required to achieve the desired IOP was reduced from 3.5 before surgery to 0.6 after surgery. No eye lost even a single line of Snellen acuity at the most recent postoperative visit. Two eyes developed hypotony in the course of follow-up. One resolved without specific intervention, and the other eye required two autologous blood injections and tube ligature to correct the hypotony. One eye underwent Ahmed glaucoma valve replacement for abrupt valve failure. Two eyes underwent penetrating keratoplasty for reasons believed to be unrelated to the glaucoma surgery. Kaplan-Meier life-table analysis showed a cumulative probability of success after Ahmed glaucoma valve implantation of 94% at 1 year. CONCLUSIONS: Ahmed glaucoma valve implantation can be an effective and safe method in the management of uveitic glaucoma. The authors hypothesize that control of the patients' uveitis, through preoperative and long-term postoperative immunomodulatory therapy, may have contributed to the success rate reported herein.     

Ahmed阀门在青光眼手术中的疗效分析

目的：评价Ahmed青光眼阀门在多种类型青光眼中的治疗效果。方法：对研究期间住院94例102眼青光眼患者予Ahmed青光眼阀门植入术,新生血管性青光眼患者术后1～2wk予全视网膜光凝。术后随访6mo以上,了解各期眼压、视力情况。结果：平均眼压从术前48.52±6.42mmHg降到术后6mo11.20±3.34mmHg。术后各时期平均眼压均低于21mmHg,与术前相比差异有显著性（P〈0.01）。102眼手术完全成功者96眼,基本成功者2眼,总有效率为96.1%。术后并发症包括短暂性前房出血、早期低眼压、浅前房等。结论：尽管Ahmed阀门植入存在一些并发症,但是对于青光眼是一种新的有效治疗方法。