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US4968296A
Expired / Lapsed
US
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Transscleral drainage implant device for the treatment of glaucoma
Assignee: I-MED DEVELOPMENT Corp A CORP OF
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Filing: 1989-12-20
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Granted: 1990-11-06
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Expires: 2009-12-20
Abstract
Abstract A method of permanently surgically treating glaucoma is disclosed together with an apparatus for effecting such treatment. In accordance with the method, an implant is disposed at a filtration site through the sclera the implant including a through going aperture leading from the anterior chamber to a bleb formed in the conjunctiva. The implant is retained in the sclera by radially compressing the same during the insertion procedure and thereafter releasing the radial compressive forces whereby the implant expands and is prevented from dislocation. An apparatus for effecting the implant is likewise disclosed, the apparatus including a cannula having a bore constraining the insert, a plunger for shifting the insert through an angularly offset opening in the cannula and a retainer filament engaged in the passage in the insert for controlling the precise location of the insert during the implant and for releasing the insert from connection to the cannula when the precise position is achieved.
Inventors
- 👤 Robert Ritch
- 👤 Edward E. Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:19
CPC Classifications
A; A61; A61M; A61M5/00; A61F; A61F9/00; A61F9/007; A61F9/00781; A61M27/00; A61M27/002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
Apparatus for effecting a trans-scleral drain implant for the permanent treatment of glaucoma comprising a cannula having an elongate bore leading to a discharge tip, an opening formed at said tip said opening being angularly oriented relative to said bore, a resilient polymeric drain implant disposed within said cannula adjacent said tip, said implant including a drain passage extending between the ends thereof, said implant including a central neck portion and flanges adjacent said ends, said flanges projecting radially outwardly beyond said neck portion in an unstressed condition of said implant, said flanges being maintained in a radially inwardly deflected position within said bore, and discharge means for shifting said implant outwardly through said opening of said tip in a direction angularly offset from said longitudinal axis of said cannula.
Claim 2
Dependent Claim
130 words
Apparatus for effecting a trans-scleral drain implant for the permanent treatment of glaucoma comprising a cannula having an elongate bore leading to a discharge tip, an opening formed at said tip said opening being angularly oriented relative to said bore, a resilient polymeric drain implant disposed within said cannula adjacent said tip, said implant including a drain passage extending between the ends thereof, said implant including a central neck portion and flanges adjacent said ends, said flanges projecting radially outwardly beyond said neck portion in an unstressed condition of said implant, said flanges being maintained in a radially inwardly deflected position within said bore, and discharge means for shifting said implant outwardly through said opening of said tip in a direction angularly offset from said longitudinal axis of said cannula.
Claim 3
Dependent Claim
25 words
Apparatus in accordance with claim 1 wherein said discharge means includes a deflector cam adjacent said tip having a cam surface directed toward said opening.
Claim 4
Dependent Claim
28 words
Apparatus in accordance with claim 2 wherein said discharge means includes plunger means slidably mounted in said bore for shifting said implant through said opening of said tip.
Claim 5
Dependent Claim
30 words
Apparatus in accordance with claim 3 and including resilient filament means extending through said plunger and said drain passage of said implant, said implant being frictionally supported on said filament.
Claim 6
Dependent Claim
28 words
Apparatus in accordance with claim 1 wherein said discharge means includes plunger means slidably mounted in said bore for shifting said implant through said opening of said tip.
Claim 7
Dependent Claim
30 words
Apparatus in accordance with claim 5 and including resilient filament means extending through said plunger and said drain passage of said implant, said implant being frictionally supported on said filament.
Claim 8
Dependent Claim
16 words
Apparatus in accordance with claim 1 wherein said discharge tip includes a sharpened lead cutting edge.
Claim 9
Dependent Claim
107 words
Apparatus for effecting a trans-scleral drain implant for the permanent treatment of glaucoma comprising a cannula having an elongate bore leading to a discharge tip, an opening formed at said tip, a resilient polymeric drain implant disposed within said cannula adjacent said tip said implant including a drain passage extending between the ends thereof, said implant including a narrow neck portion and flanges projecting radially outwardly beyond said neck portion in the unstressed condition of said implant, said flanges being maintained in a radially inwardly deflected position within said bore, and plunger means axially movably mounted within said bore for shifting said implant outwardly through said opening.
Claim 10
Dependent Claim
107 words
Apparatus for effecting a trans-scleral drain implant for the permanent treatment of glaucoma comprising a cannula having an elongate bore leading to a discharge tip, an opening formed at said tip, a resilient polymeric drain implant disposed within said cannula adjacent said tip said implant including a drain passage extending between the ends thereof, said implant including a narrow neck portion and flanges projecting radially outwardly beyond said neck portion in the unstressed condition of said implant, said flanges being maintained in a radially inwardly deflected position within said bore, and plunger means axially movably mounted within said bore for shifting said implant outwardly through said opening.
Claim 11
Dependent Claim
30 words
Apparatus in accordance with claim 8 and including resilient filament means extending through said plunger and said drain passage of said implant, said implant being frictionally supported on said filament.
Claim 12
Dependent Claim
40 words
Apparatus in accordance with claim 9 wherein said opening of said discharge tip is angularly oriented relative to the axis of said bore, the combination including deflector cam means adjacent said tip having a cam surface directed toward said opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |