The Effects of Temporary Tube Ligation in Ahmed Glaucoma Valve Surgery A Randomized Study Comparing Standard and Tied Tube Implantation for Glaucoma

What this Trial Is About

Researchers are evaluating whether delaying early fluid flow through the Ahmed glaucoma valve implant can improve surgical outcomes and provide more predictable results for patients with glaucoma or ocular hypertension. This study is a randomized, prospective, multi-center trial involving collaborators at WashU in St. Louis, Duke University, Indiana University, and the University of Pittsburgh. The goal is to compare outcomes between two surgical techniques using the Ahmed FP7 glaucoma valve implant, focusing on whether limiting early aqueous flow reduces complications like hypertensive phase, capsular fibrosis, and improves long-term intraocular pressure (IOP) control. Participants will be randomly assigned to one of two groups: traditional Ahmed valve implantation without a vicryl ligature (allowing early fluid flow) or Ahmed implantation with a vicryl ligature to delay early flow. This ligature technique aims to reduce inflammation and fibrosis by temporarily blocking fluid flow. IOP will be measured at day 1, week 1, and months 1, 3, 6, and 12 after surgery. The study will also collect clinical data on glaucoma medications used and any post-operative complications. During the study, participants will undergo regular assessments including IOP measurements and monitoring for complications. Researchers will track glaucoma medication use and any adverse events over a 12-month period. The primary outcome is the change in IOP at various time points after surgery. Participants will attend scheduled follow-up visits to help determine which surgical method provides better long-term control of eye pressure and fewer complications.

Tied Tube Trial in Glaucoma Surgery