US5755720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for performing hip prosthesis surgery
Assignee: Individual
•
Filing: 1997-01-03
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Granted: 1998-05-26
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Expires: 2017-01-03
Abstract
Abstract A method and apparatus for performing hip surgery utilizes a preformed sleeve formed of bone cement material and having apertures which is positioned in the femoral cavity. Fresh bone cement is injected under pressure to fill the femoral cavity including the apertures and any spaces or voids between the preformed sleeve and the wall of the cavity. A femoral prosthesis having a stem portion is implanted therein. The interior wall of the sleeve is larger than the stem exterior wall portion encircled by the sleeve such that fresh bone cement is between the interior wall of the sleeve and the stem.
Inventors
- 👤 W. E. Michael Mikhail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4684; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F2/30721; A61F2/30734; A61F2/4601; A61B17/68; A61B17/70; A61B17/7097; A61B17/7098; A61F2/30723; A61F2/30724; A61F2/30767; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3676; A61F2/4603; A61F2/4675; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30158; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30405; A61F2002/30535; A61F2002/30574; A61F2002/30579; A61F2002/30604; A61F2002/30614; A61F2002/30667; A61F2002/30719; A61F2002/30726; A61F2002/30738; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30789; A61F2002/30878; A61F2002/30884; A61F2/3094; A61F2/30942; A61F2002/3096; A61F2/3609; A61F2002/3625; A61F2002/4677; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0026; A61F2250/00; A61F2250/0058; A61F2250/0092; A61F2310/00; A61F2310/00005; A61F2310/00353; A61F2310/00389; A61F2310/00592; A61F2310/00796; A61F2310/00952
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
130 words
A method for implanting a femoral hip joint prosthesis having a stem extending to a distal end comprising the steps of: (a) preparing a cavity in the intramedullary canal of a femur, said cavity extending from a proximal end to a distal end; (b) providing a preformed sleeve having a size permitting its positioning in said prepared cavity, said sleeve having wall portions extending from a proximal end to a distal end, said wall portions having apertures and an interior surface; (c) positioning said sleeve in said cavity and thereafter; (d) injecting bone cement under pressure into said cavity and against said interior surface to cause said bone cement to flow through said apertures and to substantially fill all portions thereof; and (e) positioning said prosthesis in said bone cement.
Claim 2
Independent Claim
130 words
A method for implanting a femoral hip joint prosthesis having a stem extending to a distal end comprising the steps of: (a) preparing a cavity in the intramedullary canal of a femur, said cavity extending from a proximal end to a distal end; (b) providing a preformed sleeve having a size permitting its positioning in said prepared cavity, said sleeve having wall portions extending from a proximal end to a distal end, said wall portions having apertures and an interior surface; (c) positioning said sleeve in said cavity and thereafter; (d) injecting bone cement under pressure into said cavity and against said interior surface to cause said bone cement to flow through said apertures and to substantially fill all portions thereof; and (e) positioning said prosthesis in said bone cement.
Claim 3
Dependent Claim
33 words
The method according to claim 1, wherein said apertures have a size of 1 mm to 3 mm and said sleeve walls have a thickness in the range of 0.5 to 1.5 mm.
Claim 4
Dependent Claim
36 words
The method according to claim 1, wherein said preformed sleeve is formed of substantially same material as said bone cement and further including the step of cleaning and substantially drying said sleeve prior to step (d).
Claim 5
Dependent Claim
16 words
The method according to claim 3, wherein said stem is in spaced relationship with said sleeve.
Claim 6
Dependent Claim
24 words
The method according to claim 4, wherein the thickness of bone cement and said sleeve is in the range of 2 to 3 mm.
Claim 7
Dependent Claim
36 words
The method according to claim 1, wherein said positioning of step (c) leaves a portion of said sleeve adjacent said proximal end extending out of said cavity and further including the step of removing said portion.
Claim 8
Dependent Claim
37 words
The method according to claim 1, wherein said sleeve has a flange at said proximal end extending outwardly from said wall portions and, upon said positioning of step (c), said flange is adjacent said cavity proximal end.
Claim 9
Dependent Claim
22 words
The method according to claim 1, wherein said sleeve distal end defines an opening and said prosthesis stem extends through said opening.
Claim 10
Dependent Claim
26 words
The method according to claim 8, wherein a centralizer is positioned on said stem distal end and passes through said sleeve opening upon positioning said prosthesis.
Claim 11
Dependent Claim
40 words
The method according to claim 9, wherein said centralizer has a size larger than said opening and said sleeve has notches adjacent distal end and the portions of said sleeve between said notches expand outwardly upon said centralizer passing therethrough.
Claim 12
Dependent Claim
32 words
The method according to claim 1, further including providing a tamp having an exterior surface portion conforming to said sleeve interior surface, said sleeve being affixed to said tamp during step (c).
Claim 13
Independent Claim
177 words
A method for implanting a femoral hip joint prosthesis having a stem comprising the steps of: (a) preparing a cavity in the intramedullary canal of a femur, said cavity being defined by a wall extending from a proximal end toward a distal end; (b) providing a preformed sleeve having a size permitting its positioning in said prepared cavity, said sleeve having wall portions extending from a proximal end to a distal end, each of said wall portions having an exterior surface, an interior surface and apertures extending through said wall portions; (c) positioning said sleeve in said cavity with portions of said exterior surface in contact with said cavity wall, and other portions spaced from said cavity wall and thereafter; (d) injecting bone cement under pressure into said cavity and against said interior surface to cause said bone cement to flow through said apertures and to substantially fill said spaces between said sleeve and said cavity wall; and (e) positioning said prosthesis in said bone cement with said stem in generally spaced relationship with said interior surface.
Claim 14
Independent Claim
177 words
A method for implanting a femoral hip joint prosthesis having a stem comprising the steps of: (a) preparing a cavity in the intramedullary canal of a femur, said cavity being defined by a wall extending from a proximal end toward a distal end; (b) providing a preformed sleeve having a size permitting its positioning in said prepared cavity, said sleeve having wall portions extending from a proximal end to a distal end, each of said wall portions having an exterior surface, an interior surface and apertures extending through said wall portions; (c) positioning said sleeve in said cavity with portions of said exterior surface in contact with said cavity wall, and other portions spaced from said cavity wall and thereafter; (d) injecting bone cement under pressure into said cavity and against said interior surface to cause said bone cement to flow through said apertures and to substantially fill said spaces between said sleeve and said cavity wall; and (e) positioning said prosthesis in said bone cement with said stem in generally spaced relationship with said interior surface.
Claim 15
Dependent Claim
33 words
The method according to claim 12, wherein said apertures have a size of 1 mm to 3 mm and said sleeve walls have a thickness in the range of 0.5 to 2 mm.
Claim 16
Dependent Claim
39 words
The method according to claim 12, wherein said preformed sleeve is formed of substantially same material as said bone cement and further including the step of cleaning and substantially drying said sleeve prior to the introduction of bone cement.
Claim 17
Dependent Claim
24 words
The method according to claim 12, wherein the thickness of bone cement and said sleeve is in the range of 2 to 3 mm.
Claim 18
Dependent Claim
36 words
The method according to claim 12, wherein said positioning of step (c) leaves a portion of said sleeve adjacent said proximal end extending out of said cavity and further including the step of removing said portion.
Claim 19
Dependent Claim
37 words
The method according to claim 12, wherein said sleeve has a flange at said proximal end extending outwardly from said wall portions and, upon said positioning of step (c), said flange is adjacent said cavity proximal end.
Claim 20
Dependent Claim
22 words
The method according to claim 12, wherein said sleeve distal end defines an opening and said prosthesis stem extends through said opening.
Claim 21
Dependent Claim
26 words
The method according to claim 18, wherein a centralizer is positioned on said stem distal end and passes through said sleeve opening upon positioning said prosthesis.
Claim 22
Dependent Claim
40 words
The method according to claim 19, wherein said centralizer has a size larger than said opening and said sleeve has notches adjacent distal end and the portions of said sleeve between said notches expand outwardly upon said centralizer passing therethrough.
Claim 23
Dependent Claim
32 words
The method according to claim 12, further including providing a tamp having an exterior surface portion conforming to said sleeve interior surface, said sleeve being affixed to said tamp during step (c).
Claim 24
Dependent Claim
91 words
In combination, (a) a femoral hip joint prosthesis having an elongated stem extending to a distal end adapted to be implanted in a femoral canal, (b) a sleeve disposed in spaced relationship with said stem, said sleeve having wall portions extending from a proximal and to a distal end and being formed of bone cement and having apertures formed therein and (c) bone cement between said sleeve and said stem, said bone cement extending through said apertures, substantially all portions of said sleeve being in spaced relationship with said elongated stem.
Claim 25
Dependent Claim
91 words
In combination, (a) a femoral hip joint prosthesis having an elongated stem extending to a distal end adapted to be implanted in a femoral canal, (b) a sleeve disposed in spaced relationship with said stem, said sleeve having wall portions extending from a proximal and to a distal end and being formed of bone cement and having apertures formed therein and (c) bone cement between said sleeve and said stem, said bone cement extending through said apertures, substantially all portions of said sleeve being in spaced relationship with said elongated stem.
Claim 26
Dependent Claim
21 words
The combination according to claim 22, wherein said sleeve has a wall portion having a thickness of 0.5 to 2 mm.
Claim 27
Dependent Claim
24 words
The combination according to claim 22, wherein said sleeve is formed of substantially the same material as said bone cement and is adhered thereto.
Claim 28
Dependent Claim
33 words
The combination according to claim 24, wherein the thickness of said sleeve and adhered bone cement in the area of said sleeve distal end is in the range of 2 to 3 mm.
Claim 29
Dependent Claim
22 words
The combination according to claim 22, wherein said sleeve has a flange at said proximal end extending outwardly from said wall portions.
Claim 30
Dependent Claim
22 words
The combination according to claim 22, wherein said sleeve distal end defines an opening and said prosthesis stem extends through said opening.
Claim 31
Dependent Claim
16 words
The combination according to claim 27, wherein a centralizer is positioned on said stem distal end.
Claim 32
Dependent Claim
43 words
The combination according to claim 27, wherein said centralizer has a size larger than said opening and said sleeve has notches adjacent distal end and the portions of said sleeve between said notches are adapted to expand outwardly upon said centralizer passing therethrough.
References Cited (Backward Citations)
US4491987A
Cited
US4454612A
Cited
US4399814A
Cited
US4735625A
Cited
US4650489A
Cited
US4986826A
Cited
US4815454A
Cited
US4896662A
Cited
US4919153A
Cited
US5061287A
Cited
US5047035A
Cited
US5171288A
Cited
US5665121A
Cited
US5385566A
Cited
US5326376A
Cited
US5443523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |