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Related Experiment Videos

Filtering seton implant for glaucoma: initial animal trial.

H D Hoskins1, M V Drake, D S Minckler

  • 1Department of Ophthalmology, University of California, San Francisco 94143.

Ophthalmic Surgery
|October 1, 1992
PubMed
Summary

A new silicone filtering seton effectively lowered intraocular pressure (IOP) in rhesus monkeys after laser therapy. This glaucoma device showed sustained IOP reduction over 24 months with minimal inflammation.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Veterinary Medicine

Background:

  • Elevated intraocular pressure (IOP) is a primary risk factor for glaucoma.
  • Argon-laser trabeculoplasty is a common procedure to reduce IOP, but may require adjunctive therapies.
  • Developing novel surgical devices for IOP management is crucial.

Purpose of the Study:

  • To evaluate the efficacy and safety of a newly developed silicone filtering seton device.
  • To assess the long-term intraocular pressure (IOP) lowering effect of the seton in a primate model.
  • To determine the inflammatory response post-implantation.

Main Methods:

  • A silicone filtering seton was implanted in five eyes of four rhesus monkeys following argon-laser trabeculoplasty.
  • Intraocular pressure (IOP) was monitored pre- and post-implantation.

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  • One animal was euthanized at 6 weeks; the remaining three were observed for 17-24 months.

    • Main Results:

    • Postoperative inflammation was mild to moderate and resolved within the first week.
    • The silicone seton device reduced IOP by 18% to 70% compared to pre-implantation levels.
    • In unilaterally operated eyes, final IOP was equal to or lower than the fellow eye; in the bilaterally operated animal, both eyes showed reduced IOP.

    Conclusions:

    • The novel silicone filtering seton is a safe and effective device for lowering intraocular pressure (IOP).
    • The device demonstrates sustained IOP reduction over an extended follow-up period.
    • This implantable device shows promise as an adjunctive therapy for managing elevated IOP.