Pocket medical valve & method

• US 6,261,256 B1
• Filed: 10/03/1997
• Issued: 07/17/2001
• Est. Priority Date: 12/20/1996
• Status: Expired due to Term

• Current Assignee: Abdul Mateen Ahmed
• Original Assignee: Abdul Mateen Ahmed
• Inventors: Ahmed, Abdul Mateen
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): BIANCO, PATRICIA
• Application Number:
  US08/943,453
• Time in Patent Office: 1,383 Days
• Field of Search: 604/8-10, 604/289, 604/294, 604/4, 623/4, 623/4.1
• US Class Current: 604/9
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002

Abstract

A medical device includes a valve comprising a pair of plates holding in tension a membrane folded over to form a chamber with an elongated, slit-like opening along adjoining edges. An inlet tube in communication with the chamber extends outwardly. The valve is installed in a pocket of a flexible distribution plate having ridges emanating from the pocket in a radial pattern. The device is implanted in the globe of the eye of a patient between the rectus muscles.

Claims

1. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve in communication with the intraocular chamber of the eye which opens to allow fluid to drain from said chamber in response to pressure in the intraocular chamber exceeding a predetermined level,

said valve comprising an elastic membrane in tension forming a slit-like opening which is normally closed and which opens when the pressure of the intraocular chamber exceeds said predetermined level,

said membrane comprising a sheet of siliconized rubber folded to form said slit-like opening, with said folded sheet being held in position tension between a pair of rigid plates, and

a distribution plate made of a flexible material, said sheet material being folded to form said distribution plate with a pocket therein having an open mouth, said valve being seated in the pocket.

2. The medical device of claim 1 where the flexible material of the distribution plate is siliconized rubber.

3. The medical device of claim 1 where the sheet material has opposed ends and an intermediate surface portion between said opposed ends, with one end folded inward and overlying the intermediate surface portion to provide overlapping marginal areas that are bonded with an adhesive to form the pocket.

4. The medical device of claim 3 where the valve is positioned on the unfolded sheet and then the sheet is folded around the valve to form the pocket.

5. The medical device of claim 1 where the pocket is formed prior to seating the valve in the pocket.

6. The medical device of claim 1 where the pocket has an opening therein, said opening being formed in the sheet material prior to folding, and the valve includes an inlet tube that extends through said opening and is adapted to be inserted into the intraocular chamber.

7. The medical device of claim 1 where the distribution plate has a plurality of ridges thereon.

8. The medical device of claim 7 where the ridges have a series of openings thereon.

9. The medical device of claim 7 where the ridges are arranged in a radial manner originating at the pocket.

10. The medical device of claim 1 where the distribution plate, excluding the pocket, has an area of from 100 to 300 square millimeters.

11. The medical device of claim 1 where the distribution plate has markings thereon providing a guide for cutting the plate along said markings to reduce the area of said plate.

16. The medical device of claim 5 where the valve is positioned on the unfolded sheet and then the sheet is folded around the valve to form the pocket.

12. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve in communication with the intraocular chamber of the eye which opens to allow fluid to drain from said chamber in response to pressure in the intraocular chamber exceeding a predetermined level, and

a distribution plate made of a flexible sheet material, said sheet material being folded to form said distribution plate with a pocket therein having an open mouth, said valve being seated in the pocket and the pocket being at one end of the distribution plate and the opposite end of the distribution plate having an indentation therein to permit said plate to be positioned next to but not touching the optic nerve of the eye when the medical device is attached to the globe of the eye of the patient.

13. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve comprising an elastic membrane in tension forming a pressure chamber with a slit-like opening therein where the membrane comprises a sheet of siliconized rubber folded to form said slit-like opening, and

an inlet tube with one end in communication with said pressure chamber and another end adapted to be placed in communication with the intraocular chamber of the eye, said slit-like opening being normally closed and opening when the pressure of the intraocular chamber exceeds a predetermined level, and

a distribution plate made of a flexible sheet material folded to form said distribution plate with a pocket therein having an open mouth and having a surface onto which fluid flowing from the slit-like opening is received, said surface having an area of from 100 to 300 square millimeters, and said valve being seated in said pocket.

14. The medical device of claim 13 where the flexible material of the distribution plate is siliconized rubber.

15. The medical device of claim 13 where the sheet material has opposed ends and an intermediate surface portion between said opposed ends, with one end folded inward and overlying the intermediate surface portion to provide overlapping marginal areas that are bonded with an adhesive to form the pocket.

17. The medical device of claim 13 where the pocket is formed prior to seating the valve in the pocket.

18. The medical device of claim 13 where the distribution plate has a plurality of ridges thereon.

19. The medical device of claim 18 where the ridges have a series of openings thereon.

20. The medical device of claim 18 where the ridges are arranged in a radial manner originating at the pocket.

21. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve comprising an elastic membrane in tension forming a pressure chamber with a slit-like opening therein and an inlet tube with one end in communication with said pressure chamber and another end adapted to be placed in communication with the intraocular chamber of the eye, said slit-like opening being normally closed and opening when the pressure of the intraocular chamber exceeds a predetermined level, and

a distribution plate made of a flexible material and having a surface onto which fluid flowing from the slit-like opening is received, said surface having an area of from 100 to 300 square millimeters, and said distribution plate having a pocket in which said valve is seated,

the pocket being at one end of the distribution plate and the opposite end of the distribution plate having an indentation therein to permit said plate to be positioned next to but not touching the optic nerve of the eye when the medical device is attached to the globe of the eye of the patient.

22. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve comprising an elastic membrane in tension forming a pressure chamber with a slit-like opening therein where the membrane comprises a sheet of siliconized rubber folded to form said slit-like opening, and an inlet tube with one end in communication with said pressure chamber and another end adapted to be placed in communication with the intraocular chamber of the eye, said slit-like opening being normally closed and opening when the pressure of the intraocular chamber exceeds a predetermined level, and

a distribution plate made of a flexible sheet material and having a surface onto which fluid flowing from the slit-like opening is received, and said distribution plate having a pocket in which said valve is seated,

said sheet material being folded to form said distribution plate with a pocket therein having an open mouth, said sheet material having opposed ends and an intermediate surface portion between said opposed ends, with one end folded inward and overlying the intermediate surface portion to provide overlapping marginal areas that are bonded with an adhesive to form the pocket,

said pocket haveint an opening threin opposite said open mouth with the inlet tube extending thruogh said opening so theat said tube may be inserted into the intraocular chamber.

23. The medical device of claim 22 where the flexible material of the distribution plate is siliconized rubber.

24. The medical device of claim 22 where the valve is positioned on the unfolded sheet and then the sheet is folded around the valve to form the pocket.

25. The medical device of claim 22 where the pocket is formed prior to seating the valve in the pocket.

26. The medical device of claim 22 where the distribution plate, excluding the pocket, has an area of from 0.002 and 0.004 square inches.

27. The medical device of claim 22 where the distribution plate has markings thereon providing a guide for cutting the plate along said markings to reduce the area of said plate.

28. The medical device of claim 22 where the distribution plate has a plurality of ridges thereon.

29. The medical device of claim 28 where the ridges have a series of openings thereon.

30. The medical device of claim 28 where the ridges are arranged in a radial manner originating at the pocket.

31. A medical device for treating a patient suffering from glaucoma and adapted to be attached to the globe of the eye of the patient, including

a one way valve comprising an elastic membrane in tension forming a pressure chamber with a slit-like opening therein and an inlet tube with one end in communication with said pressure chamber and another end adapted to be placed in communication with the intraocular chamber of the eye, said slit-like opening being normally closed and opening when the pressure of the intraocular chamber exceeds a predetermined level, and

a distribution plate made of a flexible material and having a surface onto which fluid flowing from the slit-like opening is received, and said distribution plate having a pocket in which said valve is seated, said pocket having an opening therein with the inlet tube extending through said opening so that said tube may be inserted into the intraocular chamber,

the pocket being at one end of the distribution plate and the opposite end of the distribution plate having an indentation therein to permit said plate to be positioned next to but not touching the optic nerve of the eye when the medical device is attached to the globe of the eye of the patient.