Patent US6402784B1 successfully refreshed from Google Patents.
US6402784B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral disc nucleus prosthesis
Assignee: ABERDEEN ORTHOPAEDIC DEVELOPMENTS Ltd
•
Filing: 1998-07-10
•
Granted: 2002-06-11
•
Expires: 2018-07-10
Abstract
Abstract The present invention provides a prosthetic cover ( 12 ) shaped to form a replacement nucleus pulposis ( 56 ) for an intervertebral disc ( 50 ), said cover comprising a permeable layer of an immunologically neutral material terminating in a valve structure ( 16 ) to allow the introduction of a hydrogel material ( 14 ); characterized in that a transudative material is disposed on the intended inner face of the cover to allow a through flow of low molecular weight materials only.
Inventors
- 👤 Douglas Wardlaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/441; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8875; A61B17/8886; A61B17/8891; A61F2/46; A61F2/4603; A61F2/4611; A61F2/3094; A61F2/30965; A61F2/442; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30182; A61F2002/30187; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30535; A61F2002/30581; A61F2002/30583; A61F2/30767; A61F2002/30929; A61F2002/30971; A61F2002/444; A61F2002/4495; A61F2002/4625; A61F2002/4627; A61F2210/00; A61F2210/0085; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0034; A61F2240/00; A61F2240/001
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
101 words
In a valve structure adapted for use with a prosthetic device, said structure comprising a body with a longitudinal bore therethrough, said body comprising means for the attachment of a prosthetic cover shaped to form a replacement nucleus pulposis for an intervertebral disc nucleus to the exterior of the structure and means for the reversible attachment of the valve body to an introducer, said introducer allowing injection of a hydrogel material, the improvement which provides that said introducer is adapted to accommodate an introducer rod and that the valve body is adapted to anchor the prosthetic device within a disc space.
Claim 2
Dependent Claim
101 words
In a valve structure adapted for use with a prosthetic device, said structure comprising a body with a longitudinal bore therethrough, said body comprising means for the attachment of a prosthetic cover shaped to form a replacement nucleus pulposis for an intervertebral disc nucleus to the exterior of the structure and means for the reversible attachment of the valve body to an introducer, said introducer allowing injection of a hydrogel material, the improvement which provides that said introducer is adapted to accommodate an introducer rod and that the valve body is adapted to anchor the prosthetic device within a disc space.
Claim 3
Dependent Claim
17 words
A valve structure according to claim 1 , further comprising obturating means operatively associated with said bore.
Claim 4
Dependent Claim
29 words
A valve structure according to claim 2 , wherein the bore of the valve body is internally screw-threaded for interengagement with either of the obturating means or introducer rod.
Claim 5
Dependent Claim
22 words
A valve structure according to claim 1 , wherein said body is generally symmetrical and said bore extends axially of said body.
Claim 6
Dependent Claim
26 words
A valve structure according to claim 1 , wherein the introducer is engageable generally axially of the valve body by means of a readily reversible interlock.
Claim 7
Dependent Claim
26 words
A valve structure according to claim 1 , wherein the introducer rod is screw threaded to engage the screw threaded longitudinal bore of the valve structure.
Claim 8
Dependent Claim
14 words
A valve structure according to claim 1 , formed of an imaging transparent material.
Claim 9
Dependent Claim
27 words
A valve structure according to claim 1 , wherein a strengthening member is incorporated into the cover and adapted to receive an end of the introducer rod.
Claim 10
Dependent Claim
44 words
A valve structure according to claim 1 , further comprising a tubular screw driver and wherein the body is provided with engagement means to interlock with the tubular screwdriver, thereby in use to secure the obturating means without dislodgement of the in situ body.
Claim 11
Dependent Claim
72 words
A prosthetic cover shaped to form a replacement nucleus pulposis for an intervertebral disc, said cover comprising a permeable layer of an immunologically neutral material terminating in a valve structure to allow the introduction of a hydrogel material, characterized in that a transudative material is disposed on the intended inner faced of the cover to allow a through flow of low molecular weight materials having a molecular cut off below 12,000 daltons.
Claim 12
Dependent Claim
72 words
A prosthetic cover shaped to form a replacement nucleus pulposis for an intervertebral disc, said cover comprising a permeable layer of an immunologically neutral material terminating in a valve structure to allow the introduction of a hydrogel material, characterized in that a transudative material is disposed on the intended inner faced of the cover to allow a through flow of low molecular weight materials having a molecular cut off below 12,000 daltons.
Claim 13
Dependent Claim
30 words
A prosthetic cover according to claim 10 , wherein the cover terminates in a one-way valve structure to allow the introduction of the hydrogel material in a normally irreversible manner.
Claim 14
Dependent Claim
15 words
A prosthetic cover according to claim 10 wherein the low molecular weight material includes water.
Claim 15
Dependent Claim
24 words
A prosthetic cover according to claim 10 , wherein the transudative material is formed in a layer which has a size below 9000 daltons.
Claim 16
Dependent Claim
25 words
A prosthetic cover according to claim 10 , wherein the valve structure comprises an internal conical flap valve to permit the passage of an introducer.
Claim 17
Dependent Claim
37 words
A prosthetic cover according to claim 10 , wherein a nose section is disposed on the cover in opposed relation to the valve structure and adapted to engage the distal end of the introducer rod during insertion.
Claim 18
Dependent Claim
18 words
A prosthetic cover according to claim 10 , comprising a valve structure formed of an imaging transparent material.
References Cited (Backward Citations)
US3867728A
Cited
US3975350A
Cited
US3875595A
Cited
US4944749A
Cited
EP0277282A1
Cited
US4969888A
Cited
US5171280A
Cited
US5192326A
Cited
WO1992010982A1
Cited
US5456716A
Cited
WO1995031948A1
Cited
US6187048B1
Cited
FR2723841A1
Cited
US5976186A
Cited
WO1996011642A1
Cited
US5645597A
Cited
US6022376A
Cited
US6132465A
Cited
US6110210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-06-10 | 2005-12-10 | 2006-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-10 | 2009-12-10 | 2010-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-10 | 2013-12-10 | 2014-06-11 | $7700.00 | Window Closed / Lapsed |