Patent DE716032C successfully refreshed from Google Patents.
US5487725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic vitrectomy for retinal attachment
Assignee: PEYMAN GHOLAM A MR
•
Filing: 1994-12-01
•
Granted: 1996-01-30
•
Expires: 2014-12-01
Abstract
Abstract A surgical instrument for the treatment of simple inferior or superior retinal detachments and a method of using the same. The surgical instrument has an elongated probe with an outer tube and an inner tube slidably engaged in the outer tube. Generally, the instrument has a cutting edge and an aspiration port connected to a vacuum. A non-expanding gas delivery channel, having an outer diameter approximately that of a 36 gauge needle (0.13 mm) is adjacent the outer tube. The overall outer diameter of the probe is less than that of a 23 gauge needle (0.635 mm). In use, the probe is inserted in the vitreous cavity through a small sclerotomy incision. The inner tube oscillates within the outer tube and vitreal material is drawn into the suction port, excised by the cutting edge, and removed by vacuum. Simultaneously, non-expanding gas is introduced through the gas channel to equalize intraocular pressure. The non expanding gas migrates to the retinal tear and urges the retinal tissue toward the choroid forcing subretinal fluid from behind the retina through the tear. The instrument is withdrawn and the sclerotomy is self-sealing or requires one suture. The retinal tear is permanently attached by application of cryocoagulation or laser photocoagulation. In another embodiment of the method, the non-expanding gas delivery channel is separate from the vitrectomy probe. Another embodiment of the vitrectomy probe has an extension tip on the distal end positioned between the aspiration port and the retinal tissue to urge the retinal tissue away from the aspiration port to prevent aspiration and further damage to the retina.
Inventors
- 👤 Gholam A. Peyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:08
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00763; A61F9/00727; A61M; A61M13/00; A61M13/003; A61B; A61B17/00; A61B2017/00535; A61B2017/00544; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021; A61M1/00; A61M1/71; A61M1/77
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
129 words
An instrument for introduction into an eyeball for the treatment of detached retinal tissue comprising: an outer tube having an aspiration port formed therein; an inner tube slidably engaged within said outer tube, said inner tube having means thereon for aspirating fluid and tissue through said aspiration port and means for severing said tissue; means for moving said inner tube within said outer tube; and a tapered extension tip integrally formed on an end of said outer tube, said extension tip having a sharp cutting edge formed on a periphery thereof capable of piercing the eyeball; said extension tip being positioned on said outer tube between said aspiration port and the detached retinal tissue so as to prevent the detached retinal tissue from being aspirated into said aspiration port.
Claim 2
Dependent Claim
129 words
An instrument for introduction into an eyeball for the treatment of detached retinal tissue comprising: an outer tube having an aspiration port formed therein; an inner tube slidably engaged within said outer tube, said inner tube having means thereon for aspirating fluid and tissue through said aspiration port and means for severing said tissue; means for moving said inner tube within said outer tube; and a tapered extension tip integrally formed on an end of said outer tube, said extension tip having a sharp cutting edge formed on a periphery thereof capable of piercing the eyeball; said extension tip being positioned on said outer tube between said aspiration port and the detached retinal tissue so as to prevent the detached retinal tissue from being aspirated into said aspiration port.
Claim 3
Dependent Claim
20 words
The instrument of claim 1 wherein an outer diameter of the instrument is less than or equal to 0.64 mm.
Claim 4
Dependent Claim
25 words
The instrument of claim 1 wherein said means for moving said inner tube within said outer tube oscillates said inner tube within said outer tube.
Claim 5
Dependent Claim
25 words
The instrument of claim 1 wherein said means for moving said inner tube within said outer tube rotates said inner tube within said outer tube.
Claim 6
Independent Claim
121 words
A method for reattaching a detached retina comprising the steps of: inserting a first surgical instrument into the vitreous cavity of the eye; removing vitreous material from said vitreous cavity; introducing a second instrument into the vitreous cavity of the eye, said second surgical instrument defining a small gauge bore; injecting through said second instrument simultaneously with removal of vitreous a non-expanding gas into said vitreous cavity to maintain the intraocular pressure within said cavity at near normal level; said non-expanding gas exerting pressure against such detached retina, moving it toward the choroid of the eye; withdrawing said second instrument from said eye; withdrawing said first surgical instrument from said eye; and attaching said retina to the choroid of the eye.
Claim 7
Independent Claim
121 words
A method for reattaching a detached retina comprising the steps of: inserting a first surgical instrument into the vitreous cavity of the eye; removing vitreous material from said vitreous cavity; introducing a second instrument into the vitreous cavity of the eye, said second surgical instrument defining a small gauge bore; injecting through said second instrument simultaneously with removal of vitreous a non-expanding gas into said vitreous cavity to maintain the intraocular pressure within said cavity at near normal level; said non-expanding gas exerting pressure against such detached retina, moving it toward the choroid of the eye; withdrawing said second instrument from said eye; withdrawing said first surgical instrument from said eye; and attaching said retina to the choroid of the eye.
Claim 8
Dependent Claim
29 words
The method of claim 5 wherein said step of inserting at least one surgical instrument into the vitreous cavity further comprises inserting a vitrectomy probe into the vitreous cavity.
Claim 9
Dependent Claim
28 words
The method of claim 6 wherein said vitrectomy probe has an extension tip formed thereon, said extension tip having a razor sharp edge capable of penetrating the eye.
Claim 10
Dependent Claim
19 words
The method of claim 5 further including a first step of making a small sclerotomy incision in the eyeball.
Claim 11
Dependent Claim
41 words
The method of claim 8 wherein said step of inserting a first surgical instrument into the vitreous cavity of the eye further includes inserting at least one surgical instrument into the vitreous cavity of the eye through said small sclerotomy incision.
Claim 12
Dependent Claim
44 words
The method of claim 5 wherein the step of inserting a first surgical instrument into the vitreous cavity of the eye further includes inserting a vitrectomy instrument having a tapered end, said tapered end having a sharp peripheral edge capable of piercing the eye.
Claim 13
Independent Claim
136 words
A method of reattaching a detached retina in an eye comprising the steps of: inserting a vitrectomy probe into the vitreous cavity of the eye; inserting a non-expanding gas delivery cannula into the vitreous cavity of the eye; removing vitreous material from said vitreous cavity by cutting and suctioning the vitreous material with said vitrectomy probe; injecting simultaneously with removing vitreous material a non-expanding gas through said non-expanding gas delivery cannula into the vitreous cavity to maintain the intraocular pressure within the cavity at near normal level; said gas exerting pressure against the detached retina, moving it toward the choroid of the eye; withdrawing the vitrectomy probe from the vitreous cavity of the eye; withdrawing the non-expanding gas delivery cannula from the vitreous cavity of the eye; attaching the retina to the choroid of the eye.
Claim 14
Independent Claim
136 words
A method of reattaching a detached retina in an eye comprising the steps of: inserting a vitrectomy probe into the vitreous cavity of the eye; inserting a non-expanding gas delivery cannula into the vitreous cavity of the eye; removing vitreous material from said vitreous cavity by cutting and suctioning the vitreous material with said vitrectomy probe; injecting simultaneously with removing vitreous material a non-expanding gas through said non-expanding gas delivery cannula into the vitreous cavity to maintain the intraocular pressure within the cavity at near normal level; said gas exerting pressure against the detached retina, moving it toward the choroid of the eye; withdrawing the vitrectomy probe from the vitreous cavity of the eye; withdrawing the non-expanding gas delivery cannula from the vitreous cavity of the eye; attaching the retina to the choroid of the eye.
Claim 15
Dependent Claim
19 words
The method of claim 11 wherein said vitrectomy probe has a diameter equal to or less than 0.64 mm.
Claim 16
Dependent Claim
15 words
The method of claim 11 wherein said non-expanding gas cannula is a 30 gauge needle.
Claim 17
Dependent Claim
15 words
The method of claim 11 wherein said vitrectomy probe has an extension tip formed thereon.
Claim 18
Dependent Claim
15 words
The method of claim 14 wherein said extension tip has a sharp edge formed thereon.
Claim 19
Dependent Claim
19 words
The method of claim 11 further including a first step comprising making a small sclerotomy incision in said eye.
Claim 20
Dependent Claim
37 words
The method of claim 16 wherein said step of inserting a vitrectomy probe into the vitreous cavity of the eye further includes inserting a vitrectomy probe into the vitreous cavity of the eye through said sclerotomy incision.
Claim 21
Dependent Claim
34 words
The method of claim 11 wherein said step of attaching the retina to the choroid of the eye further includes attaching the retina to the choroid of the eye with laser coagulation or cyrocoagulation.
References Cited (Backward Citations)
US3776238A
Cited
US3815604A
Cited
US3884238A
Cited
US4011869A
Cited
US3995619A
Cited
US4246902A
Cited
US4210146A
Cited
US4530356A
Cited
US4577629A
Cited
US4652255A
Cited
US5037384A
Cited
US5037384B2
Cited
US5037384B1
Cited
US5328481A
Cited
US5019035A
Cited
US5226910A
Cited
US5106364A
Cited
US5059204A
Cited
US5047008A
Cited
US5336175A
Cited
US5284472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |