Glaucoma shunt and method for draining aqueous humor

Details Glaucoma shunt and method for draining aqueous humor Glaucoma shunt and method for draining aqueous humor

1993-02-03

1994-08-16

Willse, David H.

Surgery

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

With flow control means

623 4, 604 8, A61F 214, A61M 500

Patent

active

053382919

ABSTRACT:
An implantable shunt device useful in treating glaucoma includes an episcleral plate and a catheter having a first end adapted for insertion into the anterior chamber of the eye, and a second end mounted adjacent to the episcleral plate. A slit valve is provided in a wall of the catheter between the first end and the second end, and the opposing, generally planar surfaces of the episcleral plate are textured to interrupt the formation of a dense fibrous capsule and to promote vascularization around the episcleral plate. In order to restrict the flow of fluid through the catheter to the episcleral plate until a fibrous capsule forms around the episcleral plate, the catheter is temporarily occluded utilizing a biodegradable ligation tied between the slit valve and the second end of the catheter. In the immediate post-operative period, excess aqueous humor is forced to flow through the slit valve, which provides a significant pressure drop. Once the ligature is resorbed, aqueous humor is free to flow through the catheter to the episcleral plate for resorption into the vascular system.

REFERENCES:
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patent: 4722724 (1988-02-01), Schocket
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patent: 5171213 (1992-12-01), Price
patent: 5178604 (1993-01-01), Baerveldt et al.

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