Explantation of the novel Ahmed glaucoma valve M4 implant

J Glaucoma. 2015 Feb;24(2):e1-4. doi: 10.1097/IJG.0000000000000192.


Purpose: To report a series of cases involving Ahmed Glaucoma Valve M4 (AGV) explantation and to discuss the surgical technique to remove the drainage device.

Methods: Four cases were identified that presented with AGV M4 postoperative complications necessitating tube shunt removal. Three patients presented with conjunctival erosion and 1 patient with persistent diplopia. AGV M4 implants were removed successfully between 1.5 and 9 months after implantation.

Results: Successful explantation of the AGV M4 novel implant was achieved in all cases without intraoperative or postoperative complications.

Conclusions: If necessary, AGV M4 explantation can be successfully performed in the early postoperative period.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Aged, 80 and over
  • Device Removal / methods*
  • Female
  • Glaucoma Drainage Implants*
  • Glaucoma, Open-Angle / surgery*
  • Humans
  • Intraocular Pressure
  • Male
  • Middle Aged
  • Postoperative Complications*
  • Treatment Outcome