Outcomes of Sutureless Ahmed Glaucoma Valve Surgery: A Retrospective Study. 2022

Nicholas E Tan, and Shannon X Chen, and Alexander H Fang, and Nathan M Radcliffe
College of Medicine, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA.

BACKGROUND This study compared the safety and efficacy of sutureless Ahmed glaucoma valve surgery (AGV standalone) to sutureless AGV plus cataract surgery (AGV-CEIOL) in Black or Hispanic patients. METHODS Records from Black or non-white Hispanic patients who received either AGV standalone or AGV-CEIOL from 2014 to 2019 at a Bronx, New York practice were reviewed. All surgeries were performed using a sutureless technique with Tisseel fibrin glue. Primary outcomes included failure (defined as intraocular pressure (IOP) > 21 mmHg, ≤ 5 mmHg, or reduced by < 20% after the first 3 months; loss of light perception; or reoperation for glaucoma), hypertensive phase, IOP changes, and medication changes. Secondary outcomes included postoperative complications and interventions. RESULTS A total of 203 eyes that received AGV standalone (n = 78) or AGV-CEIOL (n = 125) were analyzed. Mean follow-up duration was 42.2 ± 17.5 months, with similar cohort-specific intervals (P = 0.68). Failure among AGV-CEIOLs (44.8%, n = 56) and AGV standalones (47.4%, n = 37) occurred at similar frequencies; log-rank testing indicated comparable 5-year survival (P = 0.56). Mean IOP among AGV-CEIOLs (15.8 ± 12.1 mmHg) was greater than standalones (8.6 ± 5.1 mmHg) at post-op day 1 (P < 0.001). The AGV-CEIOL group had a 60% lower odds of experiencing a hypertensive phase after adjustment for baseline group differences (P = 0.01). Five-year IOP reduction was similar between groups in the multivariable model (P = 0.45). There were no significant differences in medications (P > 0.05 at all time points) or in total complications (P = 0.28). More standalones required reoperation (39.7%, n = 31) compared to AGV-CEIOLs (21.6%, n = 24; P = 0.007). CONCLUSIONS Sutureless AGV-CEIOL was noninferior to sutureless AGV standalone when performed in Black or non-white Hispanic patients. The combined group experienced the hypertensive phase less frequently despite higher day 1 IOP.

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