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Implanted aqueous shunt devices for glaucoma surgery.

T Krupin

    Journal of Ophthalmic Nursing & Technology
    |January 1, 1992
    PubMed
    Summary
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    Posterior tube shunt implants create a large encapsulated area for filtering aqueous humor, addressing bleb scarring in glaucoma surgery. However, they are rarely used as a primary procedure due to foreign materials and potential complications.

    Area of Science:

    • Ophthalmology
    • Glaucoma Surgery

    Background:

    • External bleb scarring is a common problem in glaucoma surgery.
    • Posterior tube shunt implants offer an alternative filtration method.

    Purpose of the Study:

    • To describe the mechanism and application of posterior tube shunt implants.
    • To highlight the reasons for their limited use as a primary glaucoma procedure.

    Main Methods:

    • Posterior tube shunts involve an open tube placed in the anterior chamber.
    • Aqueous humor is shunted posteriorly into an encapsulated area around an episcleral explant.
    • The explant is sutured to the globe posterior to the limbus.

    Main Results:

    • These implants create a large encapsulated area for aqueous humor filtration.

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  • Posterior tube shunts are infrequently employed as the initial surgical treatment for glaucoma.

    • Conclusions:

    • Posterior tube shunts address bleb scarring by creating a posterior filtration encapsulation.
    • Their use is limited due to the foreign materials involved and a higher risk of surgical complications.