Glaucoma surgery gets a patch upgrade: which graft works best?
NCT ID NCT07285616
First seen Jun 27, 2026 · Last updated Jul 24, 2026 · Updated 1 time
Summary
This study aims to find the best material to cover a small drainage device used in glaucoma surgery. Glaucoma is a leading cause of blindness due to high pressure in the eye. The researchers will compare three different patch materials (donor sclera, cornea, and pericardium) in 180 adults to see which one leads to fewer complications and better long-term results. The goal is to improve surgical success and patient comfort.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 180 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 110 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Age 18 years and older 2. Patients selected for PreserFlo microshunt surgery and XEN stent alone or in combination with cataract surgery. 3. Ability to comprehend the study procedures Exclusion Criteria: 1. Unwilling or unable to give consent 2. Unable to come for scheduled post-operative visits 3. Pregnant or nursing women 4. Previous cyclodestructive procedures, scleral buckling procedures, or presence of silicone oil 5. Conjunctival scarring precluding a glaucoma surgery superiorly 6. Active iris neovascularization or active proliferative retinopathy 7. Vitreous in the anterior chamber for which a vitrectomy is anticipated. 8. Previous trabeculectomy, tube-shunt implantation, or surgeries that shunt aqueous outflow into the subconjunctival space
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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The Royal Alexandra Hospital
Edmonton, Alberta, T5H 3V9, Canada
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can exercise shield the eyes of glaucoma patients?
- Can better Follow-Up schedules save sight in glaucoma?
- Portable devices could take the guesswork out of eye pressure checks
- Eye drops may shield the cornea after cataract surgery
- Can a puff of air replace the eye pressure probe?
- New eye scans may catch glaucoma before vision loss