PreserFlo MicroShunt Versus Trabeculectomy in Patients with Moderate to Advanced Glaucoma: 12 Month Follow up in a Canadian Centre.

Theme: Glaucoma
What: Glaucoma
Part of: Glaucoma II: Surgery / Glaucome II: Chirurgical
When: 5/31/2024, 02:00 PM - 03:30 PM
Where: Room | Salle 801

Abstract

Purpose: The study compares the efficacy and safety of PreserFlo microshunt and trabeculectomy in eyes with moderate to advanced glaucoma.

Study Design: Retrospective chart review of cases with 12 months follow up data available. 

Methods: 132 eyes were treated with either PreserFlo or Trabeculectomy. In the PreserFlo group there were 70 eyes. In the Trabeculectomy group there were 62 eyes. The efficacy was evaluated by reduction of intraocular pressure (IOP) and glaucoma medication usage at 12 months post surgery.

Results: In the Trabeculectomy group 11% were classified as failures with 3 requiring reoperation with an Ahmed Glaucoma Valve or PreserFlo. Three more required revision surgery. One patient had persistent hypotony with vision loss. In the PreserFlo group 12% of cases were classified as failure (Requiring reoperation with trabeculectomy, PreserFlo, revision or Ahmed valve). An additional 13% still required glaucoma medications to achieve target IOP. In the PreserFlo group IOP was reduced from 25.2 mmHg to 12.12 mmHg. Medications were reduced from 3.6 to 0.8. Diamox use was reduced from 22 patients requiring it to 4 patients. Surgical revision was required for 8 patients. In the trabeculectomy group mean IOP was reduced from 29.7 mmHg to 8 mmHg. Medications were also reduced from 3.2 drops to 0.5. Diamox was reduced from 22 patients requiring Diamox to 4 patients remaining on it at one year post surgery. 

Conclusion: Both surgeries significantly reduced intraocular pressure and medication use for patients with moderate to advanced glaucoma. The reoperation, failure rate, and complication rates were similar. Trabeculectomy was more reliable to achieve lower IOP with less dependence on glaucoma medications.

Presenter(s)

Presenting Author: Tushar Dave

Additional Author(s):

Gavin Docherty, University of British Columbia

Mahraz Parvand, University of British Columbia

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