EP0321170A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intramedullary intertrochanteric fracture fixation appliance and fitting device
Assignee: Stryker Ireland Ltd
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Filing: 1988-12-12
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Granted: —
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Expires: 2008-12-12
Abstract
Abstract An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means located in said bore to selectively prevent rotation of said neck screw in the rod and the open end of said bore being provided with means to positively locate a removable fitting device on the proximal end of the rod and so that said anti-rotation means can be operated with the fitting device in position.
Inventors
- 👤 Peter Lawes
- 👤 Stephen Taylor
- 👤 Philip John Adcock
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 05:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/744; A61B17/88; A61B17/92; A61B17/921
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
88 words
An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means located in said bore to selectively prevent rotation of said neck screw in the rod and the open end of said bore being provided with means to positively locate a removable fitting device on the proximal end of the rod and so that said anti-rotation means can be operated with the fitting device in position.
Claim 2
Dependent Claim
88 words
An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means located in said bore to selectively prevent rotation of said neck screw in the rod and the open end of said bore being provided with means to positively locate a removable fitting device on the proximal end of the rod and so that said anti-rotation means can be operated with the fitting device in position.
Claim 3
Dependent Claim
30 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 1 in which said anti-rotation location means can also act to lock the neck screw in position in the rod.
Claim 4
Dependent Claim
50 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 1 or claim 2 in which said neck screw is provided with longitudinally extending grooves which can be engaged by a set screw located in said bore to selectively prevent rotation of the neck screw or clamp it in position.
Claim 5
Dependent Claim
32 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claims 1 to 3 in which the proximal end of the neck screw is provided with means to receive the removable fitting device.
Claim 6
Dependent Claim
67 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of the preceding claims in combination with a removable fitting device provided with means for positive location in the bore on the proximal end of the rod, means allowing location of the set screw, and guide means for accurately guiding means for forming a hole in the femoral end head to receive said femoral neck screw.
Claim 7
Dependent Claim
20 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 5 in which said guide means include a tunnel locator.
Claim 8
Dependent Claim
29 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 6 in which one end of said tunnel locator is adapted to engage and locate on the intramedullary rod.
Claim 9
Dependent Claim
51 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 6 or claim 7 in which said fitting device includes a removable tension adjuster which extends through said tunnel locator for connection to the proximal end of the neck screw and has adjustment means for applying a tension to said screw.
Claim 10
Dependent Claim
37 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 8 in which said adjustment means engage the proximal end of the tunnel locator to apply a compression thereon between said adjustment means and the intramedullary rod.
Claim 11
Dependent Claim
32 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 9 in which said removable tension adjuster has means to engage driving means on the neck screw to drive it into position.
Claim 12
Dependent Claim
109 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 10 in which said removable tension adjuster comprises a screw driver with a hollow shaft, the distal end of said shaft having means to engage the neck screw to drive it into position and an operating handle, a tensioning adjuster extending axially through said hollow shaft, an end of said adjuster being screw threaded to engage a threaded bore in the end of the neck screw and the other end having an operating portion by which it can be rotated, the hollow shaft carrying a screw threaded adjuster which can act against the proximal end of the tunnel locator.
Claim 13
Dependent Claim
49 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 5 to 11 in which said removable fitting device is provided with means for guiding means for forming a hole or holes in the femur to receive screws or pins to locate the distal end of the intramedullary rod.
Claim 14
Dependent Claim
74 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of preceding claims 3 to 12 including two sizes of set screw for use in the intramedullary rod, one screw being of a substantially plain configuration and the other having a flange which can engage abutment means on the intramedullary rod to locate its axial position so that it can enter the grooves in the neck screw but not lock it in position.
Claim 15
Dependent Claim
66 words
An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means to selectively prevent rotation of said neck screw in the rod and adjustable means to allow relative sliding movement between the rod and the screw over a selected portion of the length thereof.
Claim 16
Dependent Claim
66 words
An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod having an angulated opening to receive a femoral neck screw, said rod having a co-axial bore extending into said angulated opening, anti-rotation means to selectively prevent rotation of said neck screw in the rod and adjustable means to allow relative sliding movement between the rod and the screw over a selected portion of the length thereof.
Claim 17
Dependent Claim
20 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 14 in which said adjustable means comprises an adjustable stop.
Claim 18
Dependent Claim
22 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 15 in which anti-rotation means is also provided by said adjustable stop.
Claim 19
Dependent Claim
29 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claims 14, 15 and 16 in which said anti-rotation means can also act to lock the neck screw in position.
Claim 20
Dependent Claim
49 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 17 in which the neck screw is provided with longitudinally extending grooves or flats which can be engaged by a set screw located in said bore to selectively prevent rotation of the neck screw or clasp it in position.
Claim 21
Dependent Claim
55 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 18 in which said grooves or flats are in the form of inclined ramps which can co-operate with the set screw to provide the selected portion of the length of the screw over which there is relative sliding movement between the screw and the rod.
Claim 22
Dependent Claim
76 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of claims 14 to 19 in which the open end of the bore is provided with means to positively locate a removable fitting device on the proximal end of the rod and so that said anti-rotation means and said adjustable means to alter relative sliding movement between the rod and said neck screw can be operated with the fitting device in position on the rod.
Claim 23
Dependent Claim
68 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of claims 14 to 20 in combination with a removable fitting device provided with means for positive location in the bone on the proximal end of the rod, means allowing location of the set screw, and guide means for accurately guiding means for forming a hole in the femoral end head to receive said femoral neck screw.
Claim 24
Dependent Claim
20 words
An intramedullay intertrochanteric fracture fixation appliance as claimed in claim 21 in which said guide means include a tunnel locator.
Claim 25
Dependent Claim
29 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 22 in which one end of said tunnel locator is adapted to engage and locate on the intramedullary rod.
Claim 26
Dependent Claim
51 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 22 or claim 23 in which said fitting device includes a removable tension adjuster which extends through said tunnel locator for connection to the proximal end of the neck screw and has adjustment means for applying a tension to said screw.
Claim 27
Dependent Claim
37 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 24 in which said adjustment means engage the proximal end of the tunnel locator to apply a compression thereon between said adjustment means and the intramedullary rod.
Claim 28
Dependent Claim
35 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 25 in which said removable tension adjuster has means to engage driving means on the neck screw to drive it into position by rotation thereof.
Claim 29
Dependent Claim
109 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 26 in which said removable tension adjuster comprises a screw driver with a hollow shaft, the distal end of said shaft having means to engage the neck screw to drive it into position and an operating handle, a tensioning adjuster extending axially through said hollow shaft, an end of said adjuster being screw threaded to engage a threaded bore in the end of the neck screw and the other end having an operating portion by which it can be rotated, the hollow shaft carrying a screw threaded adjuster which can act against the proximal end of the tunnel locator.
Claim 30
Dependent Claim
52 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of claims 21 to 27 in which said removable fitting device is provided with means for guiding means for forming a hole or holes in the femur to receive screws or pins to locate the distal end of the intramedullary rod.
References Cited (Backward Citations)
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