Journal of the Korean Ophthalmological Society 2003;44(1):73-80.
Published online January 1, 2003.
Ahmed valve implant and penetrating keratoplasty.
Hye Won Chung, Michael Scott Kook, Hung Won Tchah
Department of ophthalmology, University of Ulsan, College of Medicine, Asan medical center, Seoul, Korea. hwtchah@amc.seoul.kr
각막이식술과 Ahmed valve implant 삽입술
정혜원 ( Hye Won Chung ) , 국문석 ( Michael Scott Kook ) , 차흥원 ( Hung Won Tchah )
Abstract
PURPOSE
To present long-term results of intraocular pressure control and graft survival of eyes with penetrating keratoplasty(PKP) and Ahmed valve implant METHODS: We retrospectively reviewed medical records of 18 patients who underwent both PKP and Ahmed valve implant at Asan medical center between July of 1993 and June of 2000. Ahmed valve implant surgery was performed either before PKP (3 eyes), after PKP (12 eyes), or at the same time as PKP (3 eyes). Mean patient age was 40.7 years (range, 18 to 77 years) and mean follow up was 32 months (range, 5 to 120 months). Glaucoma outcome was assessed by postoperative intraocular pressure. Corneal outcome was assessed by graft rejection, failure and visual acuity. RESULTS: The average preoperative intraocular pressure for all of the eyes was 35 mmHg. Eighty nine percent of them (16 eyes) achieved a final intraocular pressure of less than 20 mmHg (average, 15 mmHg on a mean of 0.9 medications). Graft failure occurred in 13/16 (72%). The overall PKP success rate, including the eyes that underwent repeat PKP, was 44 %. Visual acuity improved in 8 eyes, remained stable in 5 eyes and decreased in 5 eyes. CONCLUSIONS: Ahmed valve implant can successfully control glaucoma in a majority (89%) of PKP eyes. However, the success of corneal grafts is relatively low (44%).
Key Words: Ahmed valve implant;Graft failure;Intraocular pressure;Penetrating keratoplasty


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