EP0321170B1
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: 1994-11-30
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Expires: 2008-12-12
Abstract
Abstract An intramedullary intertrochanteric fracture fixation appliance comprising an intramedullary rod (1) having an angulated opening (2) to receive a femoral neck screw (5) one end of which carries a screw thread (6) for entry into the fracture portion of the bone to be treated, said rod having a co-axial bore (3) extending into said angulated opening, anti-rotation means which can be activated to prevent rotation of said neck screw in the rod and characterized by adjustable means (4) to permit relative sliding movement between the rod and the screw over a selected portion of the length thereof while maintaining bone fragments on opposite sides of a fracture under compression. <IMAGE>
Inventors
- 👤 Peter Lawes
- 👤 Stephen Taylor
- 👤 Philip John Adcock
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:02
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: 16
Claim 1
Independent Claim
141 words
An intramedullary intertrochanteric fracture fixation appliance for use with a removable fitting device (13) and which comprises an intramedullary rod (1) having proximal and distal ends and having an angulated opening (2) to receive a femoral neck screw (5), said rod (1) having a co-axial bore (3,10) extending into said angulated opening (2), anti-rotation means (4,7) located in said co-axial bore (3,10) which can be actuated to prevent rotation of said neck screw (5) in said angulated opening (2) and the proximal end of said co-axial bore (3,10) being provided with attachment means (11) to receive said removable fitting device (13) characterised in that said attachment means (11) are independent and separate from said anti-rotation means (4,7) and can be operated to receive, positively hold and locate said removable fitting device (13) independently of the actuation of said anti-rotation means (4,7).
Claim 2
Dependent Claim
31 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 1 characterised in that said attachment means (11) are provided by an enlarged threaded portion (11) of said co-axial bore (10).
Claim 3
Dependent Claim
63 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 1 and claim 2 in which said anti-rotation means (4,7) includes longitudinally extending grooves (7) provided on said neck screw (5) which can be engaged by a set screw (4) located in said bore (3,10) to prevent rotation of the neck screw (5) while permitting sliding movement thereof or clamp it in position.
Claim 4
Dependent Claim
82 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in claim 3 characterised by including two of said set screws (4) but of different sizes for alternative use in the intramedullary rod (1), one screw (4) being of a substantially plain configuration and the other having a flange (73) which can engage abutment means on the intramedullary rod (1) to locate its axial position so that it can enter the grooves (7) in the neck screw (5) but not lock it in position.
Claim 5
Dependent Claim
79 words
An intramedullary intertrochanteric fracture fixation appliance as claimed in any one of preceding claims 1 to 4 in combination with a removable fitting device (13) therefore, which has location means (12,27,28) for positively locating said device (13) on the proximal end of said rod (1) by engaging said attachment means (11) characterised by said location means (12,27,28) having access means (31) for operation of said anti-rotation means (4,7) with the fitting device (13) positively located on said rod (1).
Claim 6
Dependent Claim
49 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 5 characterised in that said access means (31) are provided by access opening means (31) through which said anti-rotation means (4,7) can be operated when the fitting device (13) is in position on the rod (1).
Claim 7
Dependent Claim
83 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 6 characterised in that said location means (12,27,28) includes a securing bolt (28) which engages a threaded portion (11) of the co-axial bore (3,10) to clamp the fitting device (13) in position on said rod (1), said securing bolt (28) having access opening means (31) in the form of a bore (31) through which the anti-rotation means (4,7) in the co-axial bore (3,10) in the rod (1) can be operated.
Claim 8
Dependent Claim
52 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 6 or claim 7 characterised in that said anti-rotation means (4,7) include a set screw (4) and the access opening means (31) are dimensioned to allow the set screw (4) to be inserted therethrough into the co-axial bore (3).
Claim 9
Dependent Claim
46 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in any one of the preceding claims 5 to 8 characterised by guide means (36,40) for accurately guiding means for forming a hole in the femoral end head to receive said femoral neck screw (5).
Claim 10
Dependent Claim
26 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 9 characterised in that said guide means (36,40) include a tunnel locator (40).
Claim 11
Dependent Claim
36 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 10 characterised in that one end (42) of said tunnel locator (40) is adapted to engage and locate on the intramedullary rod (1).
Claim 12
Dependent Claim
60 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 10 or claim 11 characterised in that said fitting device includes a removable tension adjuster (50) which extends through said tunnel locator (40) for connection to the proximal end of the neck screw (5) and has adjustment means (56) for applying a tension to said screw (5).
Claim 13
Dependent Claim
45 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 12 characterised in that said adjustment means (55,56) engage the proximal end of the tunnel locator (40) to apply a compression thereon between said adjustment means (55,56) and the intramedullary rod (1).
Claim 14
Dependent Claim
40 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 13 characterised in that said removable tension adjuster (50) has means (53) to engage driving means (20) on the neck screw (5) to drive it into position.
Claim 15
Dependent Claim
128 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in claim 14 characterised in that said removable tension adjuster (50) comprises a screw driver with a hollow shaft (52), the distal end of said shaft (52) having means (53) to engage the neck screw (5) to drive it into position and an operating handle (51), a tensioning adjuster (56) extending axially through said hollow shaft (52), an end of said adjuster being screw threaded (57) to engage a threaded bore (21) in the end of the neck screw (5) and the other end having an operating portion (51) by which it can be rotated, the hollow shaft (52) carrying a screw threaded adjuster (55) which can act against the proximal end of the tunnel locator (41).
Claim 16
Dependent Claim
59 words
An intramedullary intertrochanteric fracture fixation appliance and fitting device as claimed in any one of the preceding claims 5 to 15 in which said removable fitting device is provided with means (45,46) 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 (1).
References Cited (Backward Citations)
No citation records indexed.
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