Removing the ripcord from a glaucoma drainage device after 3 months
Official title: Prospective, Single-arm Interventional Study to Determine Effect of Late Ripcord Removal From Glaucoma Drainage Device
Run by Duke University · NCT07803536 · Data updated 2026-11-12
This study tests whether removing the ripcord from an implanted glaucoma drainage device changes eye pressure for adults with open-angle glaucoma.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 80 (estimated) |
| Sponsor | Duke University Academic / other |
| Locations | 1 site (Durham, North Carolina) |
| Status | Recruiting |
| Started | December 2026 |
| Main results expected | September 2028 |
| Study ends | December 2028 |
| Registry record updated | November 9, 2026 |
| Trial ID | NCT07803536 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults over 18 with a ripcord in an Ahmed Clear Path or Baerveldt drainage device implanted for glaucoma, at Duke Eye Center, and able to consent.
✕Probably not a fit
Patients whose intraocular pressure does not change or decreases are not guaranteed a direct benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
Adults with open-angle glaucoma who have an Ahmed Clear Path or Baerveldt drainage device with a ripcord are evaluated after ripcord removal to see how intraocular pressure changes over time. IOP is measured before removal, 30 minutes after, and at 1 week, 6 weeks, and 3 months during routine clinic visits. The procedure is performed at Duke Eye Center and participation is voluntary. The study aims to determine if late ripcord removal affects glaucoma control.
Why it matters
Potential benefit: If successful, the approach could offer an additional option to manage intraocular pressure in patients with drainage devices.
How similar studies have gone: Previous research on ripcord removal in glaucoma drainage devices has limited data; this study contributes new information on late removal.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age \> 18 years * Placement of Ahmed Clear Path or Baervelt drainage device with ripcord \> 3 months * Diagnosis of Glaucoma, under active management at Duke Eye Center Glaucoma Clinic * Ripcord suture still in place and accessible for removal * Able to provide written informed consent * IOP \> 10 mm Hg Exclusion Criteria: * Active ocular infection or conjunctivitis in either eye * Inability to undergo ripcord removal procedure * Scheduled for further glaucoma surgery
Where it's running
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Duke University Eye Center
Durham, North Carolina, United States Recruiting
Study contacts
- Principal investigator: Leon W Herndon, MD — Duke University Eye Center
- Study coordinator: Jonathan Shepherd
- Email: j_shepherd0829@email.campbell.edu
- Phone: (919) 681-3937
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.