Patent EP0551572A2 successfully refreshed from Google Patents.
EP0551572A2
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EP
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Tibial resector guide
Assignee: Petersen Thomas D Md
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Filing: 1992-10-15
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Granted: —
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Expires: 2012-10-15
Abstract
Abstract A tibial resector guide (10) having an angularly adjustable head (12) controlled by a thumb actuated slide mechanism. The head may be positioned in a plurality of predetermined angular orientations in the anterior-posterior plane. The cutting head guide (26) includes angled side walls (34) which permit the guide to have a narrow aperture (28) yet allow the saw blade to completely pass through the tibia. Further, the tibial resector of this invention includes a telescoping rod (16) and a length adjustment mechanism (70) adjacent the head for providing small height adjustments for positioning the head. The length adjustment member includes an enlarged thumb wheel (74) to ease operation. A pinning platform (80) is connected to the adjustment member (70) such that it is shiftable with the adjustment member relative to the guide head. The pinning platform permits the surgeon to pin the upper end of the instrument to the patient's leg preventing movement of the instrument during resection. After pinning, the head may be further adjusted in height by rotating the adjustment member. The instrument further includes a sliding ankle adjustment (14) to provide proper alignment of the guide with the tibia and femur.
Inventors
- 👤 Todd. S. Johnson
- 👤 Richard Alan Lane
- 👤 Thomas D. M.D. Alvarado Orth.Med.Group Petersen
- 👤 Chuck Kda Ind. Design Consultants Nichols
- 👤 John R. Kda Ind. Design Consultants Howard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 15:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/157
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
145 words
A resector guide for use in orthopaedic surgery to form a stable cutting surface for a surgical saw blade, said resector guide including a head, a cutting guide pivotally carried by said head and including a slot, said cutting guide having a posterior aperture and an anterior aperture forming said slot for accommodating said saw blade, said head further including adjustment means connected to said cutting guide for pivoting said slot in an anterior-posterior direction relative to said head, said head being carried by a rod adapted to position said head adjacent an end of a patient's limb, means carried by said head means operatively associated with said rod member for shifting said head in a longitudinal direction relative to said rod member, said rod further including an alignment device carried at an end opposite said head for contacting a second end of said limb.
Claim 2
Dependent Claim
66 words
The resector guide of Claim 1 wherein said adjustment means includes a fixed body and a slide carried by said body, said slide being shiftable along said fixed body, said slide being operatively connected to said cutting guide such that as said slide is shifted along said fixed body said cutting guide is shifted to vary the anterior-posterior angle of said slot relative to said rod.
Claim 3
Dependent Claim
70 words
The resector guide of Claim 2 wherein said slide includes a slot therethrough positioned at an incline relative to a longitudinal axis of said slide, said cutting guide including a pin member accommodated within said slide slot wherein as said slide is shifted in one direction relative to said fixed body said pin rides upwardly within said slide slot to thereby pivot said cutting guide slot in the anterior-posterior direction.
Claim 4
Dependent Claim
35 words
The resector guide of Claim 2 wherein said fixed body includes a plurality of recesses, said slide carrying a detent for consecutively seating within said recesses as said slide is shifted along said fixed body.
Claim 5
Dependent Claim
84 words
The resector guide of Claim 1 wherein said shifting means includes a cylindrical body rotatably connected to said rod, said cylinder including a central threaded bore, said head including a lower depending leg having screw threads thereon, said leg being threadibly accommodated within said central bore such that as said cylinder is rotated in one direction the threadible accommodation causes said leg to shift longitudinally away from said body, rotation of said cylindrical body in a second direction draws said leg into said body.
Claim 6
Dependent Claim
43 words
The resector guide of Claim 5 wherein said cylindrical body includes first and second cylinder portions connected together and forming a cavity at their junction, a pin carried by said rod extends outwardly of said rod and is restrictively accommodated within said cavity.
Claim 7
Dependent Claim
27 words
The resector guide of Claim 1 including a pinning means pivotally carried by said head for accommodating a securement device to secure said resector to a bone.
Claim 8
Dependent Claim
38 words
The resector guide of Claims 1 and 6 wherein said pinning means is operatively associated with said cylindrical body of said shifting means such that said pinning means remains longitudinally fixed relative to said rod and shifting means.
Claim 9
Dependent Claim
32 words
The resector guide of Claim 1 wherein said anterior aperture of said cutting guide is shorter than said posterior aperture of said cutting guide with said cutting guide having angled side walls.
Claim 10
Dependent Claim
80 words
An adjustable head for an orthopaedic resector guide comprising a fixed body, a slide carried by said body and a cutting guide pivotally connected to said fixed body and operatively associated with said slide, said slide being shiftable relative to said fixed body between first and second longitudinal positions on said fixed body, said cutting guide engaged with said slide so as to pivot relative to said fixed body as said slide is shifted between its first and second positions.
Claim 11
Dependent Claim
68 words
The adjustable head of Claim 10 wherein said fixed body includes a plurality of recesses and said slide carries a shiftable stop member for progressive engagement within each such recess as said slide is shifted between its first and second positions, said stop member and said recesses constituting detent means for imparting a positive snap feel to said slide as it is shifted relative to said fixed body.
Claim 12
Dependent Claim
18 words
The adjustable head of Claim 10 wherein said slide rides within a longitudinal groove of said fixed body.
Claim 13
Dependent Claim
196 words
A mechanism for adjusting the length of an orthopaedic instrument, said instrument including first and second rod portions with a transverse bore being formed in one end of said first rod with a pin extending outwardly therefrom, said second rod including screw threads on longitudinal end, said mechanism comprising a cylindrical body rotatably carried by said first rod, said cylindrical body including a threaded central bore having first and second diameters, said second diameter of said central bore for threadibly accommodating the threaded end of said second rod, a cap having a central bore and being threadibly accommodated by said central bore at said first diameter to connect said cap to said cylindrical body, said cap and said cylindrical body forming a cavity at their junction in communication with said central bore of said cap and said cylindrical body, exposed ends of said pin being positioned within said cavity and constituting means for longitudinally fixing said cylindrical body and said cap to said first rod such that as said cylindrical body is rotated, the threaded engagement between said cylindrical body and said second rod causes said second rod to longitudinally shift relative to said first rod.
Claim 14
Dependent Claim
48 words
The mechanism of Claim 13 wherein the threaded end of said second rod includes a longitudinally aligned slot for accommodating an end of said pin, wherein as said second rod is shifted, said pin contacts said slot thereby constituting means for defining the limits of said longitudinal shifting.
Claim 15
Dependent Claim
81 words
A cutting head for a resector guide for use in orthopaedic surgery, said head comprising integral anterior side and posterior side walls and end walls, a slot formed through said posterior and anterior side walls for accommodating a surgical blade therein, said posterior side wall being longer than said anterior side wall such that said end walls converge toward said anterior side wall, the opening of said slot being longer at said posterior side wall than at said anterior side wall.
References Cited (Backward Citations)
No citation records indexed.
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