US4559936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone plugging apparatus
Assignee: Individual
•
Filing: 1983-09-29
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Granted: 1985-12-24
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Expires: 2003-09-29
Abstract
Abstract A method and apparatus for practicing hip arthroplasty facilitate the quick and effective positioning of a bone plug of desired size into a femoral medullary canal at a desired depth so that the bone plug acts as a dam for methylmethacrylate cement which holds the prosthesis in place in the femoral medullary canal. One or more elongated rods have enlarged disc-shaped ends of different diameters, with color coding at the ends corresponding to the diameters, are provided. The rods have distance calibrating indicia along the length thereof. A cutting tool having an internal bone-plugging diameter corresponding to the diameter of each of the rod ends is provided, with common color coding on the cutting tool and the corresponding rod end. A common support mounts a resected femoral head holding device (which also guides the cutting tool), and the rods and cutting tools in storage positions, and also can support the rods in positions for use in removing bone plugs from the cutting tools.
Inventors
- 👤 Edward B. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30723; A61B; A61B90/00; A61B90/90; A61B90/92; A61F2/46; A61F2/4603; A61F2/4614; A61F2/4644; A61F2/4657; A61B17/00; A61B17/16; A61B17/1637; A61B17/1662; A61B17/1664; A61B17/1668; A61B17/32; A61B17/3205; A61B17/32053; A61F2/3094; A61F2/28; A61F2002/2825; A61F2002/2828; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30667; A61F2002/3071; A61F2002/4622; A61F2002/4625; A61F2002/4627; A61F2002/4631; A61F2002/4649; A61F2002/4658; A61F2002/4659; A61F2250/00; A61F2250/0058; A61F2250/0085; A61F2250/0087
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
157 words
An apparatus for facilitating hip arthroplasty, or the like, comprising: a rod having first and second enlarged generally disc-shaped ends, each end disc having a predetermined diameter, the first end disc diameter being different than the second end disc diameter; linear calibrating indicia formed on said rod at predetermined distances from each of the ends thereof; and correlating indicia associated with each of said ends, the indicia for the first end distinct from that for the second end; and first and second hollow bone cutting tools of different effective internal diameter, the first tool having an internal diameter substantially identical to the diameter of the rod first end disc diameter, and said first tool having correlating indicia corresponding to that for the rod first end; said second tool having an effective internal diameter substantially identical to the diameter of the rod second end disc diameter, and having correlating indicia corresponding to that for said rod second end.
Claim 2
Independent Claim
157 words
An apparatus for facilitating hip arthroplasty, or the like, comprising: a rod having first and second enlarged generally disc-shaped ends, each end disc having a predetermined diameter, the first end disc diameter being different than the second end disc diameter; linear calibrating indicia formed on said rod at predetermined distances from each of the ends thereof; and correlating indicia associated with each of said ends, the indicia for the first end distinct from that for the second end; and first and second hollow bone cutting tools of different effective internal diameter, the first tool having an internal diameter substantially identical to the diameter of the rod first end disc diameter, and said first tool having correlating indicia corresponding to that for the rod first end; said second tool having an effective internal diameter substantially identical to the diameter of the rod second end disc diameter, and having correlating indicia corresponding to that for said rod second end.
Claim 3
Dependent Claim
12 words
Apparatus as recited in claim 1 wherein said correlating indicia are colors.
Claim 4
Dependent Claim
72 words
Apparatus as recited in claim 1 further comprising x rods, wherein x is an integer greater than or equal to 2, and further comprising 2× cutting tools, each cutting tool having an effective internal diameter substantially identical to the diameter of a rod end disc diameter, and having a correlating indicia corresponding to a correlating indicia for a corresponding rod end, all the rod end disc diameters being different than each other.
Claim 5
Dependent Claim
62 words
Apparatus as recited in claim 1 further in combination with means for holding a bone portion and for guiding said cutting tool into operative association with a bone portion held thereby so that a cutting tool may cut a plug from the bone portion held by said holding and guiding means, the bone plug corresponding to the internal diameter of the tool.
Claim 6
Dependent Claim
116 words
Apparatus as recited in claim 4 wherein said holding and guiding means comprises a bone portion-receiving cup mounted on a support; a pair of studs extending upwardly from said support generally perpendicular thereto; a movable holding component having defining, apertures therein for receiving said studs, and having a central portion having means defining a tubular guide therein, said tubular guide in alignment with said cup; fixing means for fixing said movable holding component in a particular spaced relationship with respect to said cup to clamp a bone portion between said movable holding component and said cup; said tubular guide having an internal diameter corresponding to a common external diameter portion of each of said cutting tools.
Claim 7
Dependent Claim
34 words
Apparatus as recited in claim 4 wherein said holding and guiding means is mounted on a support, and wherein said support includes means for mounting said rod and said tools in a storage position.
Claim 8
Dependent Claim
47 words
Apparatus as recited in claim 6 wherein said support further comprises means for receiving either end of said rod and for supporting said rod at said received end so that said rod extends in a position generally perpendicular to said support, held in said generally perpendicular position.
Claim 9
Dependent Claim
55 words
Apparatus as recited in claim 6 further comprising rotating means connectable to an end of each of said cutting tools for effecting turning of each of said cutting tools when received by said holding and guiding means; said support including surface means for receipt of said rotating means for mounting it in a storage position.
Claim 10
Dependent Claim
168 words
Apparatus as recited in claim 6 wherein said support includes a plate having a first surface, said holding and guiding means upstanding from said first surface; and wherein said support further comprises a block attached to and extending generally perpendicular to a second surface of said plate, opposite said first surface; and wherein said means for mounting said tools in storage positions comprise means defining spaced elongated bores in said block, said bores being substantially parallel to each other and extending in a dimension generally parallel to said plate second surface; means defining a through-extending opening in each of said cutting tools in a portion thereof received by said bore, each said opening extending generally perpendicular to the direction of elongation of said cutting tool; each said bore having an internal diameter corresponding to the external diameter of a portion of said cutting tool containing said through-extending opening; and a locking pin extending through said block and each of said openings, and locking said tools to said block.
Claim 11
Dependent Claim
113 words
Apparatus as recited in claim 9 wherein said surface means for mounting said rod in storage position comprises an elongated depression formed in said plate first surface, and in each end of said depression a disc-shaped enlarged depression; said elongated depression having a length corresponding to the length of said rod, and said enlarged depression being dimensioned to receive said disc-shaped ends of said rod; and a releaseable clamping component mounted on said plate first surface and releasably extending over said elongated depression and spaced from the bottom of said depression a distance corresponding to the diameter of said rod, to releasably hold said rod in said depression on said plate first surface.
Claim 12
Dependent Claim
207 words
Apparatus facilitating the cutting of bone plugs from bone portions, such as from a femoral head, comprising: a support stationarily mounting a cup for receipt of a bone portion, and having a pair of studs upstanding from, and straddling, said cup; a movable holding component including means defining openings therein for receipt of said studs so that said movable component is movable toward and away from said cup guided by said studs; affixing means for affixing said movable component to said studs within a predetermined range of positions to thereby clamp a bone portion between said cup and said movable component; a tubular guide disposed in operative association with said movable holding component, and having an interior diameter aligned with said cup when said movable component is held in operative as sociation with respect to said cup, receiving said studs; a plurality of differently dimensioned bone cutting tools, each bone cutting tool having an external diameter guide portion corresponding to the internal diameter of said tubular guide, and each cutting tool having a different internal diameter, corresponding to the diameter of a bone plug to be formed thereby; and said support including surface means for mounting each of said tools in a storage position with respect thereto.
Claim 13
Dependent Claim
207 words
Apparatus facilitating the cutting of bone plugs from bone portions, such as from a femoral head, comprising: a support stationarily mounting a cup for receipt of a bone portion, and having a pair of studs upstanding from, and straddling, said cup; a movable holding component including means defining openings therein for receipt of said studs so that said movable component is movable toward and away from said cup guided by said studs; affixing means for affixing said movable component to said studs within a predetermined range of positions to thereby clamp a bone portion between said cup and said movable component; a tubular guide disposed in operative association with said movable holding component, and having an interior diameter aligned with said cup when said movable component is held in operative as sociation with respect to said cup, receiving said studs; a plurality of differently dimensioned bone cutting tools, each bone cutting tool having an external diameter guide portion corresponding to the internal diameter of said tubular guide, and each cutting tool having a different internal diameter, corresponding to the diameter of a bone plug to be formed thereby; and said support including surface means for mounting each of said tools in a storage position with respect thereto.
Claim 14
Dependent Claim
168 words
Apparatus as recited in claim 11 wherein said support includes a plate having a first surface, said holding and guiding means upstanding from said first surface; and wherein said support further comprises a block attached to and extending generally perpendicular to a second surface of said plate, opposite said first surface; and wherein said means for mounting said tools in storage positions comprise means defining spaced elongated bores in said block, said bores being substantially parallel to each other and extending in a dimension generally parallel to said plate second surface; means defining a through-extending opening in each of said cutting tools in a portion thereof received by said bore, each said opening extending generally perpendicular to the direction of elongation of said cutting tool; each said bore having an internal diameter corresponding to the external diameter of a portion of said cutting tool containing said through-extending opening; and a locking pin extending through said block and each of said openings, and locking said tool to said block.
Claim 15
Dependent Claim
55 words
Apparatus as recited in claim 11 further comprising rotating means cconnectable to an end of each of said cutting tools for effecting turning of each of said cutting tools when received by said holding and guiding means; said support including surface means for receipt of said rotating means for mounting it in a storage position.
Claim 16
Dependent Claim
64 words
Apparatus as recited in claim 11 wherein each of said cutting tools is hollow, having a said predetermined internal diameter; and further comprising a plurality of rods each having an enlarged generally disc-shaped end, the diameter of said disc-shaped end being substantially identical to the interior diameter of a cutting tool; a rod enlarged end corresponding to each of said differently dimensioned cutting tools.
Claim 17
Dependent Claim
76 words
Apparatus as recited in claim 14 wherein each rod has first and second of said enlarged generally disc-shaped ends, the diameters of the end discs of each rod being different than each other; and wherein said support further comprises means for receiving either end of said rod and for supporting said rod at said received end so that said rod extends in a position generally perpendicular to said support and held in said generally perpendicular position.
Claim 18
Dependent Claim
25 words
Apparatus as recited in claim 15 wherein said support further comprises surface means for receiving said rods for mounting said rods in a storage position.
Claim 19
Independent Claim
307 words
A method of practicing hip arthroplasty, utilizing one or more calibrated rods having enlarged disc-shaped ends of predetermined diameters with correlating indicia associated with each rod end corresponding to the diameter of the rod end, and cutting tools having different internal diameters, the internal diameters of the cutting tools corresponding to the different diameters of the rod ends, and each cutting tool having correlating indicia corresponding to the internal diameter thereof and to the correlating indicia of the corresponding rod disc end diameter; said method including the steps of: (a) severing the femur head from the femur of the hip undergoing arthroplasty; (b) calibrating the internal diameter of the femur hollow medullary canal by inserting rod ends until a rod end is found having a disc diameter that fits snugly, but does not bind, within the medullary canal approximately at the isthmus; (c) simultaneously with step (b), when inserting the rod having the desired disc end diameter, determining the depth from the level of the femoral neck transection including by reading length calibrating indicia on the rod; (d) selecting the cutting tool having correlating indicia corresponding to the correlating indicia of the selected rod disc end; (e) utilizing the selected cutting tool, forming a bone plug from the resected femoral head; (f) cutting the bone plug, if necessary, to the desired length; (g) inserting the bone plug into the femoral medullary canal; (h) utilizing the selected rod, with the selected rod end in contact with the bone plug, impacting the rod to drive the bone plug to the desired depth, as determined by reading the length calibrating indicia on the rod; (i) inserting a suitable cement into the femoral medullary canal; and (j) disposing a prosthesis in operative association with the femoral medullary canal so that the prosthesis is held in the appropriate position by the cement.
Claim 20
Independent Claim
307 words
A method of practicing hip arthroplasty, utilizing one or more calibrated rods having enlarged disc-shaped ends of predetermined diameters with correlating indicia associated with each rod end corresponding to the diameter of the rod end, and cutting tools having different internal diameters, the internal diameters of the cutting tools corresponding to the different diameters of the rod ends, and each cutting tool having correlating indicia corresponding to the internal diameter thereof and to the correlating indicia of the corresponding rod disc end diameter; said method including the steps of: (a) severing the femur head from the femur of the hip undergoing arthroplasty; (b) calibrating the internal diameter of the femur hollow medullary canal by inserting rod ends until a rod end is found having a disc diameter that fits snugly, but does not bind, within the medullary canal approximately at the isthmus; (c) simultaneously with step (b), when inserting the rod having the desired disc end diameter, determining the depth from the level of the femoral neck transection including by reading length calibrating indicia on the rod; (d) selecting the cutting tool having correlating indicia corresponding to the correlating indicia of the selected rod disc end; (e) utilizing the selected cutting tool, forming a bone plug from the resected femoral head; (f) cutting the bone plug, if necessary, to the desired length; (g) inserting the bone plug into the femoral medullary canal; (h) utilizing the selected rod, with the selected rod end in contact with the bone plug, impacting the rod to drive the bone plug to the desired depth, as determined by reading the length calibrating indicia on the rod; (i) inserting a suitable cement into the femoral medullary canal; and (j) disposing a prosthesis in operative association with the femoral medullary canal so that the prosthesis is held in the appropriate position by the cement.
Claim 21
Dependent Claim
51 words
A method as recited in claim 17 comprising the further step (k) of, between steps (e) and (f), removing the bone plug from the cutting tool by forcing the selected rod disc end into the hollow cutting tool to contact the bone plug and move it out of the cutting tool.
Claim 22
Dependent Claim
111 words
A method as recited in claim 18 where said step (k) is practiced utilizing a support surface having a notch for receipt of a rod, and is accomplished by inserting the rod end opposite the selected disc end diameter into operative association with the notch so that the rod may extend generally vertically upwardly from the support; moving the hollow cutting tool, with bone plug therein, over the selected end of the rod; and forcing the cutting tool down over the rod so that the selected disc end engages the bone plug and effects relative movement between the bone plug and the cutting tool, expelling the bone plug from the tool.
References Cited (Backward Citations)
US1123730A
Cited
US1476611A
Cited
US1742224A
Cited
US2919692A
Cited
US3850158A
Cited
US3949747A
Cited
US4005945A
Cited
US4059115A
Cited
SU625699A1
Cited
US4416278A
Cited
US4293962A
Cited
US4337773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |