Aurolab Aqueous Drainage Implant With and Without Scleral Patch Graft in Refractory Adult and Pediatric Glaucomas: A Comparative Study

Abstract

To compare the 2-year outcomes of eyes that received the Aurolab aqueous drainage implant (AADI) with and without a scleral patch graft. Retrospective comparative interventional case series. Eyes with AADI and a minimum of a 2-year follow-up were included. Eyes that underwent implantation before January 2016 had surgery with a scleral patch graft covering the distal end of the tube, whereas those that were implanted after this period underwent surgery using a needle-generated scleral tunnel without the patch graft. The cumulative failure of the AADI was defined as intraocular pressure (IOP) >18mm Hg or not reduced by 30% below baseline on 2 consecutive follow-up visits after 3months. We included 215 adult eyes (n= 147 with patch graft, n= 68 without patch graft) and 111 pediatric eyes (n= 73 with patch graft, n= 38 without a patch graft). The mean IOP in eyes without the patch graft was higher at 1month in adult eyes (before, 27.5 ± 14.1 vs after, 22.3 ± 11.1; P= .01) but not in pediatric eyes (14.3 ± before, 5.8 vs after, 17.8 ± 11.0; P= .39); there were no differences in IOP, vision, number of antiglaucoma medications, and complications between groups at all other time points. None of the eyes without the patch graft experienced tube exposure. Cumulative success rates at 2 years in adults (66.2% vs 63.9%, respectively; P= .85) were similar to those in children (77.2% vs 71.9%, respectively; P= .83) with both techniques. AADI placed without a scleral patch graft is as safe and effective as AADI placed with a patch graft in pediatric and adult refractory glaucomas.