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Middle East African Journal of Ophthalmology Middle East African Journal of Ophthalmology
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Year : 2020  |  Volume : 27  |  Issue : 1  |  Page : 40-46

Safety and efficacy of ahmed valve on intractable glaucoma in Saudi population

1 Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
2 Department of Academic and Training Affairs, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia

Correspondence Address:
Prof. Essam A Osman
Department of Ophthalmology, College of Medicine, King Saud University, P.O. BOX 245, Riyadh 11411
Saudi Arabia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/meajo.MEAJO_249_19

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PURPOSE: The study aims to assess the efficacy and safety of Ahmed glaucoma valve implant in eyes with intractable glaucoma and to evaluate the risk factors for failure. METHODS: A retrospective evaluation of 83 patients (117 eyes) with intractable glaucoma who underwent silicone Ahmed glaucoma valve implant was done in a tertiary care center in Riyadh, Saudi Arabia, between January 2014 and December 2016. Complete success was defined as intraocular pressure (IOP) ≤21 mmHg without medication after a minimum follow-up of 6 months. RESULTS: Eighty-three patients (117 eyes) with intractable glaucoma were evaluated. After a mean follow-up duration of 20.8 ± 3.1 (12–24) months, the overall success rate was achieved in 104 eyes (88.9%). Thirty-six eyes (30.8%) had a complete success rate, whereas 68 eyes (58.1%) had a qualified success rate. Thirteen eyes (11.1%) failed to achieve controlled IOP. The postoperative probability to fail was found to be increasing with time from 0.9% (0.9) in the 1st month to 11.1% (9.9) after 1 year. Complications included a hypertensive phase in 25 eyes (21.4%), encapsulation in 10 eyes (8.5%), hyphema in 7 eyes (6%), hypotony in 2 eyes (1.7%), and blood clots in the implanted tube in 2 eyes (1.7%). The presence of hyphema, scleral patch, and coronary heart diseases was found to increase the risk of failure after Ahmed valve implantation (P = 0.006, 0.040, and 0.014, respectively). CONCLUSIONS: Ahmed glaucoma valve implant was safe and effective in treating cases of intractable glaucoma.

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