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Outcomes of Ahmed and Baerveldt Glaucoma Drainage Devices in Japanese Patients

Tomoyo Hara1,2, Hanako O Ikeda1,3, Shogo Numa1

  • 1Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto.

Journal of Glaucoma
|November 3, 2025
PubMed

Insights

This study found no significant differences in surgical outcomes between the Ahmed glaucoma valve and Baerveldt glaucoma implant. However, the Baerveldt implant had more complications, particularly hypotony.

Area of Science:

  • Ophthalmology
  • Glaucoma Surgery
  • Medical Device Evaluation

Background:

  • Glaucoma surgery aims to reduce intraocular pressure (IOP) and prevent vision loss.
  • Tube-shunt surgery is a common treatment for refractory glaucomas.
  • The Ahmed glaucoma valve and Baerveldt glaucoma implant are widely used devices.

Purpose of the Study:

  • To compare the preoperative conditions and surgical outcomes of the Ahmed glaucoma valve and Baerveldt glaucoma implant.
  • To evaluate the incidence of complications associated with each device in clinical practice.

Main Methods:

  • Retrospective analysis of 154 eyes undergoing glaucoma tube-shunt surgery between 2015 and 2021.
  • Exclusion of patients with prior glaucoma tube shunt surgeries.
  • Data collection included preoperative conditions, IOP, medication scores, visual acuity, and complications.

Main Results:

  • No significant differences in IOP or medication scores were observed at 36 months between the Ahmed glaucoma valve and Baerveldt glaucoma implant groups.
  • Cumulative success rates at 60 months were similar for both devices under different IOP definitions.
  • The Baerveldt glaucoma implant group showed a higher incidence of postoperative complications, primarily hypotony.

Conclusions:

  • Both the Ahmed glaucoma valve and Baerveldt glaucoma implant demonstrate comparable long-term surgical outcomes.
  • Implant choice is influenced by glaucoma type and patient's surgical history.
  • The Baerveldt glaucoma implant is associated with a higher rate of complications, notably hypotony.
Abstract

Keywords:
Ahmed glaucoma valveBaerveldt glaucoma implantglaucoma tube-shunt surgeryintraocular pressurepostoperative complications

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