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RECRUITING
NCT07359547
NA

Comparing XEN®-63 Gel Stent and PRESERFLO® MicroShunt

Sponsor: Universitaire Ziekenhuizen KU Leuven

View on ClinicalTrials.gov

Summary

The goal of this randomized controlled clinical trial is to learn whether two minimally invasive bleb-forming glaucoma implants can effectively treat adult patients with open-angle glaucoma who require surgical lowering of intraocular pressure (IOP). Specifically, the study evaluates whether the PRESERFLO™ MicroShunt is at least as effective as the XEN®-63 Gel Stent in reducing IOP after surgery.  The main questions it aims to answer are: * Does the PRESERFLO™ MicroShunt provide IOP reduction at 12 months that is non-inferior to the XEN®-63 Gel Stent? * How do the two devices compare over 24 months with respect to medication reduction, need for additional glaucoma procedures, complications, and preservation of visual function and ocular structures? Participants will: * Be randomly assigned (1:1) to receive either the XEN®-63 Gel Stent or the PRESERFLO™ MicroShunt during a single glaucoma surgery. * Attend scheduled follow-up visits over 24 months for eye-pressure measurements, vision testing, visual-field testing, OCT imaging, endothelial-cell counts, and safety assessments. * Receive standard postoperative care and report any complications or additional treatments during the study period.

Official title: Minimally Invasive Bleb-Forming Surgical Approaches for Treating Primary Open-Angle Glaucoma: A Randomized Controlled Trial Comparing XEN®-63 Gel Stent and PRESERFLO® MicroShunt

Key Details

Gender

All

Age Range

40 Years - Any

Study Type

INTERVENTIONAL

Enrollment

166

Start Date

2026-01

Completion Date

2028-01

Last Updated

2026-01-22

Healthy Volunteers

No

Interventions

DEVICE

XEN®-63 Gel Stent

The XEN®-63 Gel Stent is a hydrophilic gel implant made of cross-linked, purified collagen (gelatin). This devices bypasses the trabecular meshwork and lower eye pressure via a subconjunctival filtering bleb, aided by intra-operative mitomycin C to reduce scarring. It has already been approved for the European market and therefore bear the CE mark.

DEVICE

PRESERFLO™ MicroShunt

The PRESERFLO™ MicroShunt is a SIBS-polymer microshunt. This devices bypasses the trabecular meshwork and lower eye pressure via a subconjunctival filtering bleb, aided by intra-operative mitomycin C to reduce scarring. It has already been approved for the European market and therefore bear the CE mark.

Locations (3)

University Hospitals UZ Leuven

Leuven, Vlaams-brabant, Belgium

Universitätsklinikum Bonn

Bonn, North Rhine-Westphalia, Germany

ULS Santa Maria

Lisbon, Lisbon District, Portugal