Glaucoma drainage the lacrimal system and method

• US 4,886,488 A
• Filed: 08/04/1988
• Issued: 12/12/1989
• Est. Priority Date: 08/06/1987
• Status: Expired due to Term

• Current Assignee: Siemens Plessey Electronic Systems Limited (BAE Systems Plc)
• Original Assignee: Thomas C. White
• Inventors: White, Thomas C.
• Primary Examiner(s): DAVIS JR, ALBERT
• Application Number:
  US07/229,746
• Time in Patent Office: 495 Days
• Field of Search: 604/9, 604/294
• US Class Current: 604/9
• CPC Class Codes: A61F 9/00772 Apparatus for restoration of tear ducts
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002

Abstract

A device and method for allowing fluid to flow from the interior of the eye into the nasolacrimal drainage system associated with the eye to relieve high intraocular pressure in the treatment of glaucoma. The method employs a flexible tube having one end extendable into the anterior chamber of the eye and having its other end in communication with the nasolacrimal drainage system of the eye. A one-way valve is provided within the tube to restrain liquid flow to a direction from the anterior chamber of the eye toward the lacrimal drainage system. The method includes the steps of inserting one end of the tube into the anterior chamber of the eye and inserting the other end of the tube into a portion of the nasolacrimal drainage system; aqueous humor is permitted to escape into the tube at the anterior chamber end, and flows outwardly into the passages of the nasolacrimal system. One or more one-way valve within the tube permit fluid flow only away from the anterior chamber.

Claims

1. A method for treating glaucoma in an eye having an anterior chamber and an associated lacrimal drainage system, comprising the steps of providing a tube having inlet and outlet ends and a one-way valve therebetween to allow fluid flow only toward the outlet end;

surgically inserting the inlet end of the tube into an anterior chamber of the eye; and

positioning and attaching the outlet end of the tube in the conjunctival cul-de-sac of the eye.

2. A method for treating glaucoma in an eye having an anterior chamber and associated lacrimal drainage system, comprising the steps of providing a tube having inlet and outlet ends and a pair of oneway valves therebetween permitting fluid flow only toward the outlet end;

surgically inserting the inlet end of the tube into the anterior chamber of the eye; and

surgically positioning and attaching the outlet end of the tube to the eye so that fluid will flow into the lacrimal drainage system.

3. An ocular device for glaucoma treatment comprising a flexible tube having inlet and outlet ends, shaped to be inserted into the anterior chamber of an eye and the conjunctival cul-de-sac of the eye, respectively, and a one-way valve positioned within the tube between the inlet and outlet ends to allow fluid flow only toward the outlet end.

4. The device of claim 3 wherein the one-way valve is positioned proximal to the inlet end of the tube.

5. An ocular device for glaucoma treatment comprising a flexible tube having inlet and outlet ends, shaped to be inserted into the anterior chamber and the lacrimal drainage system of an eye, respectively, and at least two one-way valves positioned within the tube between the inlet and outlet end to allow fluid flow only toward the outlet end.

6. The device of claim 5 wherein one one-way valve is positioned proximal to the inlet end of the tube and another one-way valve is positioned proximal to the outlet end of the tube.

7. An ocular device fo glaucoma treatment comprising a tube having inlet and outlet ends shaped to be inserted into the anterior chamber and the lacrimal drainage system of the eye, respectively;

a one-way valve positioned within the tube between the inlet and outlet ends to allow fluid flow only toward the outlet end; and

a microporous filter carried by the tube to restrain particles greater than the pore size from passing therethrough toward the inlet end.

8. The device of claim 7 wherein the filter is bag-shaped and encloses the outlet tube end, the filter extending outwardly of the tube beyond said outlet end and defining a space between two inner walls communicating with the outlet end.

9. The device of claim 8 in which the filter comprises a pair of filter sheets joined at their peripheries to define an interior space communicating with the outlet tube end.