Comparison of the Outcome of Silicone Ahmed Glaucoma Valve Implantation with a Surface Area between 96 and 184 mm²in Adult Eyes

Abstract

PurposeTo compare the success rates, complications, and visual outcomes between silicone Ahmed glaucoma valve (AGV) implantation with 96 mm2 (FP8) or 184 mm2 (FP7) surface areas.MethodsThis study is a retrospective review of the records from 132 adult patients (134 eyes) that underwent silicone AGV implant surgery. Among them, the outcomes of 24 eyes from 24 patients with refractory glaucoma who underwent FP8 AGV implantation were compared with 76 eyes from 76 patients who underwent FP7 AGV implantation. Preoperative and postoperative data, including intraocular pressure (IOP), visual acuity, number of medications, and complications were compared between the 2 groups.ResultsThere were no significant differences in baseline characteristics between the 2 groups (p > 0.05). The postoperative visual acuity of the patients in the FP8 group was better than that of the patients in the FP7 group in some early postoperative periods (p < 0.05); however, after 10 postoperative months, visual acuity was not significantly different through the 3-year follow-up period (p > 0.05). Postoperative IOP was not significantly different between the 2 groups (p > 0.05) except for IOP on postoperative day 1 (11.42 mmHg for the FP7 group and 7.42 mmHg for the FP8 group; p = 0.031). There was no statistical difference in success rates, final IOP, number of medications, or complication rates between the 2 groups (p > 0.05).ConclusionsThe FP7 and FP8 AGV implants showed no difference in terms of vision preservation, IOP reduction, and number of glaucoma medications required.

Surgical Outcomes of Additional Ahmed Glaucoma Valve Implantation in Refractory Glaucoma

“…Our previous study suggested that the surgical outcomes were similar with both FP8 AGV and FP7 AGV implantation, with respect to vision preservation, IOP reduction, and the number of required glaucoma medication. 14 This finding suggests that implantation of FP8 AGV as a second GDD would be helpful for refractory glaucoma. To the best of our knowledge, no study has reported surgical outcome regarding this issue.…”

Ahmed valve in glaucoma surgery

“…K. Koh и соавт. [6] не отметили существенной разницы в эффективности при имплантации FP8 и FP7: при 3-летнем сроке наблюдения эффективность составила 79,2 и 72,7% соответственно, что было сопоставимо с данными других исследований. В глазах у взрослых пациентов модель FP7 клапана Ахмеда является предпочтительной.…”

One Year of Glaucoma Research in Review

“…Koh and colleagues 74 performed a retrospective review including 24 eyes of 24 patients with refractory glaucoma who underwent FP8 Ahmed glaucoma valve implantation (surface area, 96 mm 2 ) and 76 eyes of 76 patients who underwent FP9 implantation (surface area, 184 mm 2 ). While patients in the FP8 group exhibited better visual acuity in the early postoperative period, there was no significant difference between vision, IOP reduction, number of medications, or complication rates between the groups over the 3-year follow-up period.…”

“…While patients in the FP8 group exhibited better visual acuity in the early postoperative period, there was no significant difference between vision, IOP reduction, number of medications, or complication rates between the groups over the 3-year follow-up period. 74 …”