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Related Experiment Videos

Aqueous shunt implantation in glaucoma.

Jing Wang1, Keith Barton2,3,4

  • 1Glaucoma Service, Moorfields Eye Hospital, London, UK.

Taiwan Journal of Ophthalmology
|October 17, 2017
PubMed
Summary

Glaucoma drainage devices, or aqueous shunts, are effective for refractory glaucoma. Non-valved shunts offer lower intraocular pressure but may require specific techniques to prevent hypotony.

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Area of Science:

  • Ophthalmology
  • Glaucoma Management
  • Surgical Devices

Background:

  • Refractory glaucoma management increasingly involves aqueous shunts.
  • Common shunts are based on the Molteno implant design: tube, plate, and equatorial diversion.
  • This design enhances resistance to scarring compared to trabeculectomy.

Purpose of the Study:

  • To compare the efficacy and complications of valved versus non-valved aqueous shunts.
  • To describe techniques for managing hypotony with non-valved implants.

Main Methods:

  • Review of commonly used glaucoma drainage devices, including the Ahmed Glaucoma Valve (valved) and Baerveldt Glaucoma Implant (non-valved).
  • Discussion of design principles and their impact on outcomes.
  • Description of surgical techniques for non-valved implants to mitigate hypotony.
Keywords:
Aqueous shuntsglaucoma drainage devicesglaucoma surgeryglaucoma tube shunts

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Main Results:

  • Valved implants show a lower tendency for hypotony.
  • Non-valved implants with larger end plates achieve lower intraocular pressures with less encapsulation.
  • Non-valved implants necessitate specific suturing techniques to prevent early hypotony.

Conclusions:

  • Both valved and non-valved aqueous shunts are viable options for refractory glaucoma.
  • Choice depends on balancing hypotony risk with intraocular pressure reduction and encapsulation.
  • While rare, shunt-related infections, corneal decompensation, and diplopia are potential risks.