US3815599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Femoral shaft surgical rasp for use in hip prosthesis surgery
Assignee: Individual
•
Filing: 1973-03-02
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Granted: 1974-06-11
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Expires: 1993-03-02
Abstract
Abstract A femoral shaft surgical rasp for forming a canal in an amputated femur shaft for reception of the elongated shank of a femoral prosthesis head member in the femur in performing hip prosthesis surgery, wherein the rasp has a working portion configurated like the elongated shank of the deformal prosthesis component or member providing a generally wedge-shaped zone, and has the cutting promenances of the rasp along one longitudinal edge only, with the remaining three surfaces smooth. By this design, damage to the abductor muscles and/or soft tissue which are in the working path of reciprocative movement of the rasp when forming the canal is avoided, and the instrument cuts more efficiently because the smooth surface opposite the cutting edge exerts a forciful wedging action toward the bone surface confronting the cutting edge.
Inventors
- 👤 W Deyerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1664; A61B17/1668; A61B17/1659; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3609; A61F2002/3625; A61F2002/3631
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
307 words
A femoral shaft surgical rasp for use in performing total and sub-total hip prosthesis surgery to form an elongated canal in an amputated femur shaft for reception of an elongated shank portion of a femoral prosthesis component to be fixed in the canal, the femoral prosthesis having a head portion integral with the shank portion including a flanged neck at the juncture of the head and shank portions and the shank portion having a straight longitudinal edge and a concavely curved opposite longitudinal edge, the rasp comprising an elongated handle portion and an elongated working blade portion extending integrally from the handle portion which is a substantial replica of the prosthesis member shank in lateral profile and cross-section having a pair of opposite longitudinal edges conforming in location and direction to the longitudinal edges of said prosthesis shank defining a wedge-shaped region spaced from a free end of the working portion and the blade portion having flat parallel sides extending between said edges and forming the lateral surface of the rasp blade portion, the rasp having cutting prominences only along the length of a first one of said edges of said working blade portion to confine the cutting action of the rasp on the femur to the internal femur portion in confronting abutment with only said first one of said edges, the longitudinal edge of said blade portion opposite said first one of said edges being smooth throughout its length to slide without cutting on confronting portions of the femur and force more efficient cutting by said first one of said edges due to the bearing pressure of the femur on the smooth edge, and the smooth edge and sides of the working blade portion presenting only smooth, not damaging surfaces to abductors and other soft tissue during reciprocative movement of the rasp in its working path.
Claim 2
Dependent Claim
307 words
A femoral shaft surgical rasp for use in performing total and sub-total hip prosthesis surgery to form an elongated canal in an amputated femur shaft for reception of an elongated shank portion of a femoral prosthesis component to be fixed in the canal, the femoral prosthesis having a head portion integral with the shank portion including a flanged neck at the juncture of the head and shank portions and the shank portion having a straight longitudinal edge and a concavely curved opposite longitudinal edge, the rasp comprising an elongated handle portion and an elongated working blade portion extending integrally from the handle portion which is a substantial replica of the prosthesis member shank in lateral profile and cross-section having a pair of opposite longitudinal edges conforming in location and direction to the longitudinal edges of said prosthesis shank defining a wedge-shaped region spaced from a free end of the working portion and the blade portion having flat parallel sides extending between said edges and forming the lateral surface of the rasp blade portion, the rasp having cutting prominences only along the length of a first one of said edges of said working blade portion to confine the cutting action of the rasp on the femur to the internal femur portion in confronting abutment with only said first one of said edges, the longitudinal edge of said blade portion opposite said first one of said edges being smooth throughout its length to slide without cutting on confronting portions of the femur and force more efficient cutting by said first one of said edges due to the bearing pressure of the femur on the smooth edge, and the smooth edge and sides of the working blade portion presenting only smooth, not damaging surfaces to abductors and other soft tissue during reciprocative movement of the rasp in its working path.
Claim 3
Dependent Claim
30 words
A femur shaft surgical rasp as defined in claim 1, wherein said elongated handle portion and said working portion extend along parallel axes in opposite directions from the juncture therebetween.
Claim 4
Dependent Claim
82 words
A femur shaft surgical rasp as defined in claim 1, wherein said rasp includes a flanged collar formation at the juncture of said handle and working portions which substantially duplicates relative to the axis of said working portion the angular disposition of said flanged neck of the prosthesis component relative to the longitudinal axis of the prosthesis shank and presents a flat substantially encircling inclined surface toward the working portion simulating the surface of the flanged neck facing toward the prosthesis shank.
Claim 5
Dependent Claim
82 words
A femur shaft surgical rasp as defined in claim 2, wherein said rasp includes a flanged collar formation at the juncture of said handle and working portions which substantially duplicates relative to the axis of said working portion the angular disposition of said flanged neck of the prosthesis component relative to the longitudinal axis of the prosthesis shank and presents a flat substantially encircling inclined surface toward the working portion simulating the surface of the flanged neck facing toward the prosthesis shank.
Claim 6
Dependent Claim
34 words
A femur shaft surgical rasp as defined in claim 1, wherein said cutting prominences are located only on said curved longitudinal edge of said working portion of the rasp along the entire length thereof.
Claim 7
Dependent Claim
34 words
A femur shaft surgical rasp as defined in claim 3, wherein said cutting prominences are located only on said curved longitudinal edge of said working portion of the rasp along the entire length thereof.
Claim 8
Dependent Claim
34 words
A femur shaft surgical rasp as defined in claim 2, wherein said cutting prominences are located only on said straight longitudinal edge of said working portion of the rasp along the entire length thereof.
Claim 9
Dependent Claim
34 words
A femur shaft surgical rasp as defined in claim 4, wherein said cutting prominences are located only on said straight longitudinal edge of said working portion of the rasp along the entire length thereof.
Claim 10
Dependent Claim
32 words
A femur shaft surgical rasp as defined in claiM 3, wherein said working portion has holes therein identical in size and spacing and location to transverse fastener openings in the prosthesis shank.
Claim 11
Dependent Claim
32 words
A femur shaft surgical rasp as defined in claim 6, wherein said working portion has holes therein identical in size and spacing and location to transverse fastener openings in the prosthesis shank.
References Cited (Backward Citations)
US2812761A
Cited
US3670724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |