US7285107B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreoretinal instrument
Assignee: Alcon Inc
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Filing: 2003-09-26
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Granted: 2007-10-23
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Expires: 2023-09-26
Abstract
Abstract An improved instrument for removing subretinal fluid and performing fluid exchanges in vitreoretinal surgery is disclosed. The instrument includes a cannula with a curved distal portion and a side port on the curved distal portion for aspirating subretinal fluid. The instrument also includes a second port for aspirating a second fluid from the vitreous cavity during a fluid exchange.
Inventors
- 👤 Steven T. Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:21
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/74; A61M1/741; A61M1/7413; A61M1/7415; A61M1/77; A61M1/774; A61F; A61F9/00; A61F9/007; A61F9/00736; A61M1/772
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
242 words
A method of draining fluid from a subretinal space of an eye and performing a fluid exchange in a vitreous of said eye, comprising the steps of: providing a vacuum source; providing an vitreoretinal instrument, comprising: a handle; and a cannula coupled to said handle comprising: a curved distal portion having a plane of curvature and a side port disposed at an angle of about 90 degrees to said plane of curvature; a second port disposed away from said side port; a first flexible tubing having a distal end fluidly coupled to said side port and a proximal end fluidly coupled to said vacuum source; a second flexible tubing having a distal end fluidly coupled to said second port and a proximal end fluidly coupled to said vacuum source; and a valve disposed on said handle for selectively opening and closing said second flexible tubing; grasping said handle; disposing said cannula within said eye so that said side port is in said subretinal space and said second port is in said vitreous above said subretinal space; actuating said valve to close said second flexible tubing; activating said vacuum source; aspirating fluid from said subretinal space via said side port and said first flexible tubing; actuating said valve to open said second flexible tubing; and aspirating said fluid from said vitreous via said second port and said second flexible tubing while continuing to perform said step of aspirating fluid from said subretinal space.
Claim 2
Independent Claim
242 words
A method of draining fluid from a subretinal space of an eye and performing a fluid exchange in a vitreous of said eye, comprising the steps of: providing a vacuum source; providing an vitreoretinal instrument, comprising: a handle; and a cannula coupled to said handle comprising: a curved distal portion having a plane of curvature and a side port disposed at an angle of about 90 degrees to said plane of curvature; a second port disposed away from said side port; a first flexible tubing having a distal end fluidly coupled to said side port and a proximal end fluidly coupled to said vacuum source; a second flexible tubing having a distal end fluidly coupled to said second port and a proximal end fluidly coupled to said vacuum source; and a valve disposed on said handle for selectively opening and closing said second flexible tubing; grasping said handle; disposing said cannula within said eye so that said side port is in said subretinal space and said second port is in said vitreous above said subretinal space; actuating said valve to close said second flexible tubing; activating said vacuum source; aspirating fluid from said subretinal space via said side port and said first flexible tubing; actuating said valve to open said second flexible tubing; and aspirating said fluid from said vitreous via said second port and said second flexible tubing while continuing to perform said step of aspirating fluid from said subretinal space.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein said step of disposing said cannula further comprises disposing said cannula so that a ventral surface of said cannula is closest to said retina and a dorsal surface of said cannula is closest to said choroid.
Claim 4
Dependent Claim
48 words
The method of claim 1 wherein said step of actuating said valve is performed when a user of said instrument observes that a size of a retinal detachment or a retinal tear in said eye ceases decreasing due to said step of aspirating fluid from said subretinal space.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said side port prevents incarceration of said retina into said side port.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein said cannula comprises a second side port disposed at an angle of about 6 degrees to said plane of curvature and opposite said first side port.
Claim 7
Dependent Claim
30 words
The method of claim 1 further comprising the steps of: disposing an infusion cannula within said vitreous; and injecting a retinal tamponading fluid into said vitreous via said infusion cannula.
Claim 8
Independent Claim
247 words
A method of draining fluid from a subretinal space of an eye and performing a fluid exchange in a vitreous of said eye, comprising the steps of: providing a vacuum source; providing an vitreoretinal instrument, comprising: a handle; and a cannula coupled to said handle comprising: a curved distal portion having a plane of curvature and a side port disposed at an angle of about 90 degrees to said plane of curvature; a second port disposed away from said side port; a first flexible tubing having a distal end fluidly coupled to said side port and a proximal end fluidly coupled to said vacuum source; a second flexible tubing having a distal end fluidly coupled to said second port and a proximal end fluidly coupled to said vacuum source; and a valve disposed on said handle for selectively opening and closing said second flexible tubing; grasping said handle; disposing said cannula within said eye so that said side port is in said subretinal space and said second port is in said vitreous above said subretinal space; actuating said valve to close said second flexible tubing; passively draining fluid from said subretinal space via said side port and said first flexible tubing; activating said vacuum source; actuating said valve to open said second flexible tubing; and aspirating said fluid from said vitreous via said second port and said second flexible tubing while aspirating said fluid from said subretinal space via said side port and said first flexible tubing.
Claim 9
Independent Claim
247 words
A method of draining fluid from a subretinal space of an eye and performing a fluid exchange in a vitreous of said eye, comprising the steps of: providing a vacuum source; providing an vitreoretinal instrument, comprising: a handle; and a cannula coupled to said handle comprising: a curved distal portion having a plane of curvature and a side port disposed at an angle of about 90 degrees to said plane of curvature; a second port disposed away from said side port; a first flexible tubing having a distal end fluidly coupled to said side port and a proximal end fluidly coupled to said vacuum source; a second flexible tubing having a distal end fluidly coupled to said second port and a proximal end fluidly coupled to said vacuum source; and a valve disposed on said handle for selectively opening and closing said second flexible tubing; grasping said handle; disposing said cannula within said eye so that said side port is in said subretinal space and said second port is in said vitreous above said subretinal space; actuating said valve to close said second flexible tubing; passively draining fluid from said subretinal space via said side port and said first flexible tubing; activating said vacuum source; actuating said valve to open said second flexible tubing; and aspirating said fluid from said vitreous via said second port and said second flexible tubing while aspirating said fluid from said subretinal space via said side port and said first flexible tubing.
Claim 10
Dependent Claim
42 words
The method of claim 7 wherein said step of disposing said cannula further comprises disposing said cannula so that a ventral surface of said cannula is closest to said retina and a dorsal surface of said cannula is closest to said choroid.
Claim 11
Dependent Claim
49 words
The method of claim 7 wherein said step of actuating said valve is performed when a user of said instrument observes that a size of a retinal detachment or a retinal tear in said eye ceases decreasing due to said step of passively draining fluid from said subretinal space.
Claim 12
Dependent Claim
18 words
The method of claim 7 wherein said side port prevents incarceration of said retina into said side port.
Claim 13
Dependent Claim
32 words
The method of claim 7 wherein said cannula comprises a second side port disposed at an angle of about 90 degrees to said plane of curvature and opposite said first side port.
Claim 14
Dependent Claim
30 words
The method of claim 7 further comprising the steps of: disposing an infusion cannula within said vitreous; and injecting a retinal tamponading fluid into said vitreous via said infusion cannula.
References Cited (Backward Citations)
US2756740A
Cited
US3439675A
Cited
US3661144A
Cited
US4850350A
Cited
US5328481A
Cited
US5795323A
Cited
US5246436A
Cited
US5242386A
Cited
US5830214A
Cited
US6132390A
Cited
US6193714B1
Cited
US6325798B1
Cited
US6210357B1
Cited
US6282442B1
Cited
US6135984A
Cited
US6162187A
Cited
US6413245B1
Cited
US6419654B1
Cited
US20040039253A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-10-22 | 2011-04-23 | 2011-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-10-22 | 2015-04-23 | 2015-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-10-22 | 2019-04-23 | 2019-10-23 | $7700.00 | Window Closed / Lapsed |