Trabeculectomy With Ologen Collagen Implant vs Trabeculectomy With Provisc in Steroid Induced Glaucoma
Comparative Study of the Efficacy and Safety of Ologen Collagen Implant Versus Cohesive Viscoelastic in Trabeculectomy Performed for Steroid Induced Glaucoma
  • Phase

    Phase 1/Phase 2
  • Study Type

  • Status

    Completed No Results Posted
  • Intervention/Treatment

    collagen ...
  • Study Participants

The purpose of this prospective randomized study is to assess and compare the clinical efficacy and safety of primary trabeculectomy with Ologen® collagen implant and cohesive viscoelastic (Provisc®) - augmented trabeculectomy in patients with medically uncontrolled steroid induced glaucoma.
Steroid induced glaucoma is a well known and widely described disastrous clinical condition. However the subject of selection of most effective and safe treatment modality is still being discussed.

Sihota R et al reported that 26.5% cases required surgical treatment to control IOP. Unfortunately survival rate of successful blebs in 10 years after trabeculectomy varies from 40% to 60%. Anti-fibrotic agent MMC as adjunct to filtration surgery was used to prevent postoperative scarring that could compromise surgical success of trabeculectomy. Additional use of MMC in trabeculectomy leads to low final IOP but could be associated with such complications as cataract formation, intraocular toxicity, avascular filtering blebs, wound leakage, subsequent blebitis and endophthalmitis. Tissue-engineered biodegradable and biocompatible implant Ologen® Collagen Matrix may be used as an alternative to MMC. Ologen® is CE Mark and FDA approved artificial porcine extracellular matrix for modulating wound healing. Ologen® has been tested in animal models and has triple action:

prevent the collapse of the subconjunctival space;
guides the fibroblast to grow through the matrix pores thus preventing scar formation;
may act as an aqueous reservoir (avoids post-op hyperfiltration and shallow anterior chamber).

The filtering blebs scoring was performed by using Moorfields Bleb Grading System and Visante anterior segment optical coherence tomography.
Study Started
Jul 31
Primary Completion
Sep 30
Study Completion
Sep 30
Last Update
Sep 21

Device Ologen Collagen Matrix

Ologen is a porous collagen-glycosaminoglycan matrix that decrease early postoperative scarring after penetrating anti-glaucomatous surgery by randomized collagen deposition and microcyst formation. Implantation of Ologen Collagen Matrix in trabeculectomy was performed.

Drug Provisc

Provisc is an cohesive viscoelastic.

Implantation of Ologen in trabeculectomy Experimental

Ologen Collagen Matrix is implanted in primary limbal-based trabeculectomy. It should be placed on the top of the loosely-sutured scleral flap before suturing of the conjunctiva thus preventing the collapse of the subconjunctival space.

Provisc in trabeculectomy Active Comparator

Provisc is used in primary limbal-based trabeculectomy. At the end of the surgery cohesive viscoelastic (Provisc) is injected under the scleral flap to prevent early hypotony.


Inclusion Criteria:

Age > 16 years (inclusive)
Patients with medically uncontrolled steroid induced glaucoma

Exclusion Criteria:

Primary open angle glaucoma, angle-closure glaucoma, post-traumatic, uveitic, neovascular, or dysgenetic glaucoma
Known allergic reaction to porcine collagen
Preliminary conjunctival damage (trauma, vitreo-retinal surgery, previous glaucoma or strabismus surgery, etc)
No Results Posted