Ophthalmic device for draining excess intraocular fluid

Details Ophthalmic device for draining excess intraocular fluid Ophthalmic device for draining excess intraocular fluid

1995-05-01

1997-05-06

Clarke, Robert A.

Surgery

Devices transferring fluids from within one area of body to...

With flow control means

604289, A61M 500, A61M 3500

Patent

active

056265590

ABSTRACT:
An ophthalmic device for removal of excess intraocular fluid from the eye, the device having a general shape resembling that of a thumbtack and comprising a head portion, and a leg portion essentially normal to the head portion. The head portion is dome-shaped with its edges defining an essentially planar surface which together with the dome-shaped portion defines a captured space. The leg portion has one end attached to or integral with the head portion within the captured space, and has another, free end, provided with an annular shoulder tapered in the direction of the free end. The leg defining a duct leading from one or more first opening at the free end to one or more second openings at the proximal end, with the one or more second openings leading into the captured space, the duct being provided with one-way valve means permitting flow of fluid only in the direction of the first openings to the second openings. The distance between the surface and the shoulder is about that of the thickness of the cornea or sclera of the eye. The device being fixed in the eye by inserting the free end of the leg through the cornea or sclera, following which the shoulder engages the inner surface of the cornea or sclera and the edges of the head portion rest on the external surface of the cornea of sclera.

REFERENCES:
patent: 3788327 (1974-01-01), Donowitz et al.
patent: 4402681 (1983-09-01), Haas et al.
patent: 4457757 (1984-07-01), Molteno
patent: 4968296 (1990-11-01), Ritch et al.
patent: 5127901 (1992-07-01), Odrich

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