US4968298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interspace irrigator
Assignee: Warsaw Orthopedic Inc
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Filing: 1988-09-12
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Granted: 1990-11-06
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Expires: 2008-09-12
Abstract
Abstract A suction irrigation device for use in the lumbar interspace following conventional discectomy is disclosed. The device has an inflatable cuff to seal the interspace opening and permit the evacuation of residual disc fragments through a closed system so as to assure that such debris does not find its way into the spinal canal.
Inventors
- 👤 Gary K. Michelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/77; A61M1/772; A61B; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00261; A61M1/79
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
An interspace irrigator for removing disc fragments in a disc space comprising a hollow tubular member, said hollow tubular member having a washing means for injecting irrigation fluid through said hollow tube and for removing irrigation fluid and debris through said hollow tubular member and closure means associated with said hollow tubular member for filling the access opening during a partial discectomy, said washing means comprising an enclosed chamber connected to one end of said hollow tubular member and means for introducing fluid under pressure through said hollow tube and withdrawing fluid through said hollow tubular member and including trap means for trapping fragments of disc material removed by the washing means for preventing them from returning to said disc space.
Claim 2
Dependent Claim
121 words
An interspace irrigator for removing disc fragments in a disc space comprising a hollow tubular member, said hollow tubular member having a washing means for injecting irrigation fluid through said hollow tube and for removing irrigation fluid and debris through said hollow tubular member and closure means associated with said hollow tubular member for filling the access opening during a partial discectomy, said washing means comprising an enclosed chamber connected to one end of said hollow tubular member and means for introducing fluid under pressure through said hollow tube and withdrawing fluid through said hollow tubular member and including trap means for trapping fragments of disc material removed by the washing means for preventing them from returning to said disc space.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 in which said washing means comprises a syringe having a plunger connected to one end of said hollow tubular member.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1 in which said closure means comprises an inflatable member.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 in which said inflatable member is resilient and may be inflated and deflated after insertion into the access opening.
Claim 6
Dependent Claim
15 words
The apparatus of claim 4 in which said inflatable member surrounds said hollow tubular member.
Claim 7
Dependent Claim
14 words
The apparatus of claim 3 in which said closure means comprises a resilient member.
Claim 8
Dependent Claim
27 words
The apparatus of claim 3 in which said inflatable member has an inflation means, said inflation means comprising a compressible air bladder connected to said inflatable member.
Claim 9
Dependent Claim
26 words
The apparatus of claim 7 in which said air bladder has an apperature, said apperature being normally closed and being opened to deflate said inflatable member.
Claim 10
Dependent Claim
16 words
The apparatus of claim 7 in which said air bladder includes a two way air valve.
Claim 11
Dependent Claim
14 words
The apparatus of claim 1 in which said closure means comprises a solid member.
Claim 12
Dependent Claim
20 words
The apparatus of claim 1 in which said closure means has a narrowed diameter portion between two larger diameter portions.
Claim 13
Independent Claim
82 words
A method of washing a disc space having an access created by a partial discectomy comprising the steps inserting a hollow tubular member connected at one end to a syringe filled with a washing fluid, and having a surrounding inflatable member proximate the other end, in the disc space; inflating the inflatable member whereby the inflatable member fills the access opening; inflating the inflatable member; pushing and pulling the plunger of the syringe; deflating the inflatable member; and removing the tubular member.
Claim 14
Independent Claim
82 words
A method of washing a disc space having an access created by a partial discectomy comprising the steps inserting a hollow tubular member connected at one end to a syringe filled with a washing fluid, and having a surrounding inflatable member proximate the other end, in the disc space; inflating the inflatable member whereby the inflatable member fills the access opening; inflating the inflatable member; pushing and pulling the plunger of the syringe; deflating the inflatable member; and removing the tubular member.
Claim 15
Dependent Claim
104 words
An interspace irragator for removing disc fragments in a disc space comprising a hollow tubular member, said hollow tubular member having washing means for injecting irragation fluid through said hollow tube and for removing irragation fluid said debris through said hollow tubular member and closure means associated with said hollow tubular member for filling the access opening during a partial discectomy, said washing means comprising a syringe having a plunger connected to one end of said hollow tubular member and including a trap means for trapping fragments of disc material removed by the washing means for preventing them from returing to said disc space.
Claim 16
Dependent Claim
104 words
An interspace irragator for removing disc fragments in a disc space comprising a hollow tubular member, said hollow tubular member having washing means for injecting irragation fluid through said hollow tube and for removing irragation fluid said debris through said hollow tubular member and closure means associated with said hollow tubular member for filling the access opening during a partial discectomy, said washing means comprising a syringe having a plunger connected to one end of said hollow tubular member and including a trap means for trapping fragments of disc material removed by the washing means for preventing them from returing to said disc space.
Claim 17
Dependent Claim
45 words
The apparatus of claim 13 in which said trap comprises a mesh pivotally mounted on one side within the chamber of said syring, said mesh being movable upwardly during the upward stroke of the plunger and held down during the downward stroke of the plunger.
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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 |