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Reevaluating Plate Dimensions in Glaucoma Drainage Devices: The Case for Smaller Sizes

  • By

  • Giovanni Rubegni

  • Mostafa Dowidar

  • Salman Sadiq

  • September 16, 2026

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Clinical Report: Reevaluating Plate Dimensions in Glaucoma Drainage Devices

Background

The choice of plate size in glaucoma drainage devices is critical, as it can influence surgical outcomes and patient safety. Traditional views favor larger plates. Understanding the relationship between plate size and clinical outcomes is essential for optimizing glaucoma management.

Data Highlights

No numerical data is available in the source material.

Key Findings

  • Comparative studies show no significant differences in long-term IOP or success rates between 250 mm² and 350 mm² Baerveldt devices.
  • The 350 mm² Baerveldt implant demonstrated higher success rates than the 500 mm² model in a long-term trial.
  • Smaller devices like the Molteno single-plate (134 mm²) achieved better IOP control than the Ahmed FP7 (184 mm²).
  • Plate design may be more influential than size beyond approximately 175–250 mm².
  • Larger plates may increase surgical complexity and associated risks.

Clinical Implications

Surgeons should consider the trade-offs associated with larger plate sizes in GDDs, as they may complicate surgeries.

Conclusion

The findings suggest that smaller sizes may be sufficient for effective management.

Related Resources & Content

  1. Glaucoma Physician, 2022 -- Plate Fixation Sutures for Glaucoma Drainage Devices
  2. Glaucoma Physician, 2021 -- Current Choices in Glaucoma Drainage Devices
  3. Primary Open-Angle Glaucoma Preferred Practice Pattern® - Ophthalmology
  4. The Ahmed Versus Baerveldt Study: Five-Year Treatment Outcomes - ScienceDirect
  5. Randomized clinical trial of the 350-mm2 versus the 500-mm2 Baerveldt implant: longer term results - Ophthalmology
  6. glaucoma physician — Plate Fixation Sutures for Glaucoma Drainage Devices
  7. Glaucoma Physician — Next-generation Drainage Implants
  8. Primary Open-Angle Glaucoma Preferred Practice Pattern® - Ophthalmology
  9. The Ahmed Versus Baerveldt Study: Five-Year Treatment Outcomes - ScienceDirect
  10. Randomized clinical trial of the 350-mm2 versus the 500-mm2 Baerveldt implant: longer term results - Ophthalmology

Original Source(s)

Minimal effective plate: rethinking plate size in glaucoma drainage devices

  • by Giovanni Rubegni, Mostafa Dowidar, Salman Sadiq

  • September 16, 2026

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