Surgery – Devices transferring fluids from within one area of body to...
Patent
1997-04-17
1999-03-16
Weiss, John G.
Surgery
Devices transferring fluids from within one area of body to...
604294, A61M 500
Patent
active
058823271
ABSTRACT:
An implantable ocular device to decrease intraocular pressure by draining aqueous humor from the anterior chamber of the eye into an extraocular space above the sclera and below the conjunctiva and Tenon's layers. The device includes a conduit attached to an episcleral drainage plate having a porous posterior surface for cellular ingrowth and attachment by the sclera. The distal end of the conduit is inserted into the anterior chamber and protrudes out of the limbal/scleral junction. A portion of the outer surface of the conduit adjacent to the plate has a porous ingrowth surface area to enhance anchoring of the conduit to the surrounding extraocular tissues. The plate has a smooth anterior surface and a porous posterior surface. This device uses porous surfaces to enhance cellular infiltration and ingrowth to increase apposition with surrounding tissues, decrease micromovement of the implant, and thereby decrease the fibrous capsule formation surrounding the episcleral plate. Long-term failure of glaucoma drainage devices has been linked to thickening of the filtering bleb due to excessive fibrous capsule formation.
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Doody Stephen R.
O Ki Yong
Weiss John G.
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