US4462394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary canal seal for cement pressurization
Assignee: Howmedica Osteonics Corp
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Filing: 1982-05-03
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Granted: 1984-07-31
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Expires: 2002-05-03
Abstract
Abstract A novel cannula is disclosed for use in the application of bone cement to the prepared intramedullary canal of a bone prior to the cementation of a surgical implant therein. The novel cannula comprises a hollow tube adapted to slidingly receive the nozzle of a bone cement extruder, an inflatable cuff surrounding the tube, and means to inflate the cuff. In operation, the inflated cuff forms a seal against the wall of the intramedullary canal, thereby preventing escape of cement through the open end of the prepared canal and insuring that the applied cement is properly pressurized within the canal. As a result, a highly secure cementation of the surgical implant within the intramedullary canal is achieved.
Inventors
- 👤 Carl H. Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:41
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30723; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3676; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30581
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A method for inserting bone cement through the open proximal end of a prepared intramedullary canal of a bone and into said canal, and pressurizing said cement therein, prior to the cementation of a surgical implant within said canal, said method comprising the steps of (a) providing a bone cement extruder having a nozzle; (b) providing a cannula comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said tube being adapted to receive said nozzle in sliding fit; (c) sliding said tube over said nozzle so that said cannula is held by said extruder; (d) inserting said nozzle and said cannula through said open end into said intramedullary canal; (e) inflating said inflatable cuff so that it forms a seal against the wall of said canal; and (f) applying bone cement through said nozzle into said canal until said cement becomes pressurized, whereby escape of cement through the open end of said intramedullary canal is prevented by said seal.
Claim 2
Independent Claim
180 words
A method for inserting bone cement through the open proximal end of a prepared intramedullary canal of a bone and into said canal, and pressurizing said cement therein, prior to the cementation of a surgical implant within said canal, said method comprising the steps of (a) providing a bone cement extruder having a nozzle; (b) providing a cannula comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said tube being adapted to receive said nozzle in sliding fit; (c) sliding said tube over said nozzle so that said cannula is held by said extruder; (d) inserting said nozzle and said cannula through said open end into said intramedullary canal; (e) inflating said inflatable cuff so that it forms a seal against the wall of said canal; and (f) applying bone cement through said nozzle into said canal until said cement becomes pressurized, whereby escape of cement through the open end of said intramedullary canal is prevented by said seal.
Claim 3
Dependent Claim
27 words
A method of claim 1 wherein said nozzle is slid in a proximal direction within said tube as said bone cement is applied during said step (f).
Claim 4
Dependent Claim
18 words
A method of claim 1 or 2 wherein said inflatable cuff has a substantially frustoconical shape when inflated.
Claim 5
Dependent Claim
33 words
A method of claim 1 or 2 wherein at least a portion of the surface of said cuff that fits against the wall of said intramedullary canal to form said seal is corrugated.
Claim 6
Dependent Claim
31 words
A method of claim 3 wherein at least a portion of the surface of said cuff that fits against the wall of said intramedullary canal to form said seal is corrugated.
Claim 7
Dependent Claim
16 words
A method of claim 1 wherein said inflatable cuff is permanently affixed to said hollow tube.
Claim 8
Dependent Claim
92 words
A cannula for use in inserting bone cement into the intramedullary canal of a bone and pressurizing said cement therein comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said inflatable cuff having a substantially frustoconical shape when inflated and unrestrained, and with said cuff being adapted to form a seal against the wall of said intramedullary canal when said cannula is inserted into said canal and said cuff is inflated.
Claim 9
Dependent Claim
92 words
A cannula for use in inserting bone cement into the intramedullary canal of a bone and pressurizing said cement therein comprising a hollow tube having a distal end and a proximal end, an inflatable cuff surrounding at least a portion of said tube, and means to inflate said cuff, with said inflatable cuff having a substantially frustoconical shape when inflated and unrestrained, and with said cuff being adapted to form a seal against the wall of said intramedullary canal when said cannula is inserted into said canal and said cuff is inflated.
Claim 10
Dependent Claim
16 words
The cannula of claim 7 wherein said inflatable cuff is permanently affixed to said hollow tube.
Claim 11
Dependent Claim
39 words
The cannula of claim 7 or 8 wherein at least a portion of the surface of said cuff that fits against the wall of said intramedullary canal to form said seal is provided with a plurality of laterally-extending corrugations.
References Cited (Backward Citations)
US3255747A
Cited
US3223083A
Cited
US3225760A
Cited
US3707146A
Cited
US3889665A
Cited
US4160446A
Cited
US4213461A
Cited
US4274163A
Cited
US4338925A
Cited
US4341691A
Cited
US4369772A
Cited
US4328056A
Cited
US4357716A
Cited
US4313434A
Cited
US4364394A
Cited
US4340046A
Cited
US4399814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |