Ahmed glaucoma valve implantation for secondary glaucoma post-vitrectomy

Subaşı, Sevgi; Yüksel, Nurşen; Karabaş, V. Levent; Tuğan, Büşra Yılmaz; Basaran, Ece

doi:10.1007/s10792-021-02050-2

Cited by 6 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the implantation of AGVs in non-ST quadrants is technically challenging, complications were similar to those of procedures performed in other quadrants. The five-year cumulative probabilities of success were found to be 74.7% and 67.8% in Groups 1 and 2, respectively, corroborating previously reported findings (9,10) . For example, Kang et al (11) found that the five-year cumulative probability of AGV implantation was 63.7% in 135 eyes.…”

Section: Discussionsupporting

confidence: 90%

Nonsuperotemporal quadrant implantation of the Ahmed glaucoma valve using modified long scleral tunnel technique for intraocular pressure control

Un,

Imamoglu

2024

ABO

View full text Add to dashboard Cite

As superotemporal implantation of the Ahmed glaucoma valve is not always feasible in cases of refractory glaucoma, this study examined the characteristics and surgical outcomes of cases in which the valve was implanted in a nonsuperotemporal quadrant using a modified long scleral tunnel technique. Methods: This retrospective case-control study included 37 eyes with nonsuperotemporal quadrant-Ahmed glaucoma valve implantation in Group 1 and 69 eyes with superotemporal Ahmed glaucoma valve implantation in Group 2. The demographic characteristics of these groups, surgical outcomes, including complications, further surgical interventions, and surgical success rates were compared. Surgical success was defined as an intraocular pressure not exceeding 21 mmHg, accompanied by a minimum reduction of 20% in intraocular pressure from the baseline without any additional intraocular pressure-lowering procedures, and the absence of light perception loss or phthisis bulbi. Results: Group 1 had significantly higher numbers of eyes with secondary glaucoma and preoperative surgical procedures than Group 2 (p<0.05). Both groups had mean preoperative intraocular pressure values, and mean intraocular pressure values at the last visit of 34.2 and 27.9 months, 35.5 ± 1.5 and 35.8 ± 1.2 mmHg, and 14.5 ± 5 and 14.9 mmHg, respectively. Although both groups had 70.2% and 75.8% as their five-year cumulative probability of success, respectively, the rates of complications, revisional surgery, and additional surgical procedures did not differ significantly (p>0.05). Conclusion: The modified long scleral tunnel technique for Ahmed glaucoma valve implantation in nonsuperotemporal quadrants achieves intraocular pressure control and complication rates comparable to superotemporal implantation.

show abstract

Section: Discussionsupporting

confidence: 90%

Nonsuperotemporal quadrant implantation of the Ahmed glaucoma valve using modified long scleral tunnel technique for intraocular pressure control

Un,

Imamoglu

2024

ABO

View full text Add to dashboard Cite

show abstract

“…In recent years, a few attempts have been made to treat the infantile cataract by crystalline resection using the minimally invasive vitrectomy [ 5 ]. It has been reported that simultaneous vitrectomy and AGV implantation in patients with posterior segment disease-related glaucoma may be an effective option to manage complex glaucoma cases [ 6 ]. At present, surgical treatment is the most commonly used treatment for this disease, and 23G minimally invasive vitrectomy, glaucoma drainage valve implantation, and phacoemulsification cataract extraction are commonly used.…”

Section: Introductionmentioning

confidence: 99%

23G Minimally Invasive Vitrectomy Combined with Glaucoma Drainage Valve Implantation and Phacoemulsification Cataract Extraction for Neovascular Glaucoma Secondary to Proliferative Diabetic Retinopathy with Vitreous Hemorrhage

Shi

Dong

Liang

et al. 2022

Computational and Mathematical Methods in Medicine

View full text Add to dashboard Cite

Objective. To evaluate the clinical efficacy of the combined application of 23G minimally invasive vitrectomy, glaucoma drainage valve implantation, and phacoemulsification cataract extraction in the treatment of neovascular glaucoma (NVG) secondary to proliferative diabetic retinopathy (PDR) combined with vitreous hemorrhage (VH). Methods. Eighty-three patients (91 eyes) with PDR diagnosed as NVG phase III complicated with VH from June 2018 to May 2020 were selected as the study subjects. The subjects were randomly divided into 3 groups: group A was treated with 23G minimally invasive vitrectomy combined with glaucoma drainage valve implantation; group B was given 23G minimally invasive vitrectomy combined with phacoemulsification cataract extraction; and group C was treated with 23G minimally invasive vitrectomy combined with glaucoma drainage valve implantation and phacoemulsification cataract extraction. The uncorrected visual acuity (UCVA), intraocular pressure (IOP), and iris neovascularization (INV) scores were recorded and compared among the 3 groups before and after operation, and then the postoperative pain relief and complications were observed. Results. Through observation, there was no significant difference in the UCVA, IOP, and INV scores in the 3 groups before operation. After the operation, the UCVA, IOP, and INV scores of the 3 groups were significantly lower than those before operation. After operation, the UCVA of the 3 groups increased first and then decreased, and it improved most significantly in the 3rd month after operation and decreased in the 4th month after operation. There were significant differences in UCVA among the 3 groups at each time point after operation. From the 1st day to the 6th month after operation, the IOP of the 3 groups showed an upward trend, and there was no significant difference among the 3 groups in IOP at each time point after operation. At the 1st, 3rd, and 6th months after operation, the INV score of group A and group B was higher than that of group C. There was no significant difference in the INV score between group A and group B. The incidence of complications was not significantly different among the 3 groups. Conclusion. 23G minimally invasive vitrectomy, glaucoma drainage valve implantation, and phacoemulsification cataract extraction can effectively improve the UCVA, IOP, and INV scores of NVG secondary to PDR with VH, and the combined application of the 3 methods has better security.

show abstract

“…After the function of the AGV is stabilized, intermittent ocular massage can prevent severe obstruction of the lumen caused by the accumulation of metabolic substances in the eye ( 8 ). Ocular massage was performed to avoid the drainage implantation site and cornea, as well as to avoid drainage tube displacement caused by direct compression ( 7 ). Since the drainage site in our patients was located in the superior temporal quadrant, we recommended that they look above and massage below.…”

Section: Discussionmentioning

confidence: 99%

“…The Ahmed glaucoma valve (AGV) was introduced in 1993 as the first GDI with a one-way valve mechanism that allows immediate postoperative flow and prevents ocular hypotension ( 6 ). Therefore, an AGV may be preferred for patients at risk of low intraocular pressure (IOP), including those who have undergone vitrectomy, and may be effective for treating vitrectomized eyes with refractory glaucoma ( 7 ). The AGV implantation technique takes advantage of the relatively wide and easily separated posterior superior scleral space.…”

Section: Introductionmentioning

confidence: 99%

Pars Plana Ahmed Valve Implantation for Vitrectomized Eyes With Refractory Glaucoma

Xiang¹,

Xiao²,

Yu³

et al. 2022

Front. Med.

View full text Add to dashboard Cite

This study aimed to analyze the surgical outcomes of pars plana Ahmed valve implantation in vitrectomized eyes with refractory glaucoma. We performed a retrospective case review of consecutive patients with refractory glaucoma after undergoing pars plana vitrectomy who underwent pars plana Ahmed valve implantation between July 2019 and December 2020 at the glaucoma unit of the Affiliated Changshu Hospital of Xuzhou Medical University (Changshu, China). All the patients were followed up for ≥12 months postoperatively. We recorded pre- to postoperative changes in best-corrected visual acuity (BCVA), intraocular pressure (IOP), number of anti-glaucoma medication, corneal endothelial count, and surgical complications, if any. There was a significant improvement in the median BCVA from 2.30 (0.87, 2.30) logMAR preoperatively to 1.70 (0.70, 2.30) logMAR at discharge and 1.0 (0.52, 1.85) at final examination (p = 0.011, p = 0.001). Compared with the preoperative IOP level, there was a significant decrease in the postoperative IOP at each postoperative time point (p < 0.001). There was a significant reduction in the median number of anti-glaucoma drugs (including postoperative ocular massage), from 3.00 (2.00, 3.00) preoperatively to 0.00 (0.00, 1.00) at the last follow-up postoperative examination (p < 0.001). A 29-year-old woman with proliferative diabetic retinopathy who underwent surgical treatment at 5 months postoperatively for fibrous wrapping formed around the plate of the Ahmed valve showed an IOP of 14 mmHg at the last follow-up. Our findings indicated that pars plana Ahmed valve implantation can be safely performed for managing vitrectomized eyes with refractory glaucoma.

show abstract

Ahmed glaucoma valve implantation for secondary glaucoma post-vitrectomy

Cited by 6 publications

References 18 publications

Nonsuperotemporal quadrant implantation of the Ahmed glaucoma valve using modified long scleral tunnel technique for intraocular pressure control

Nonsuperotemporal quadrant implantation of the Ahmed glaucoma valve using modified long scleral tunnel technique for intraocular pressure control

23G Minimally Invasive Vitrectomy Combined with Glaucoma Drainage Valve Implantation and Phacoemulsification Cataract Extraction for Neovascular Glaucoma Secondary to Proliferative Diabetic Retinopathy with Vitreous Hemorrhage

Pars Plana Ahmed Valve Implantation for Vitrectomized Eyes With Refractory Glaucoma

Contact Info

Product

Resources

About