Patent EP0441577B1 successfully refreshed from Google Patents.
EP0441577B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intramedullary hip screw
Assignee: Smith and Nephew Inc
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Filing: 1991-02-04
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Granted: 1995-12-13
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Expires: 2011-02-04
Abstract
Abstract An intramedullary hip screw includes an intramedullary rod, a lag screw and a sleeve for slidably receiving the lag screw. The sleeve is received in a passage in the intramedullary rod having an axis which is oblique to the longitudinal axis of the intramedullary rod such that the axis of the sleeve is directed toward the head of the femur. The intramedullary hip screw of the present invention permits sliding compression of fractures, particuarly intertrochanteric fractures and fractures of the femoral neck.
Inventors
- 👤 A. Glenn Durham
- 👤 David L. Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/744
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
Apparatus for treating fractures of the femur comprising: a lag screw (60) having an elongate body member and means (64) formed at one end thereof adapted in use to engage the head of a femur; an intramedullary rod (20) having a proximal head (22) and a stem (24) distal thereto and being adapted in use for insertion into the intramedullary canal of the femur, said head having at least one passage (28) being positioned obliquely relative to longitudinal axis of said rod (20) such that when said rod (20) is in position within the intramedullary canal of the femur, the axis of said passage (28) is inclined toward the head of the femur; characterised in that the apparatus comprises a hollow sleeve (40) in said passage (28) for slidably receiving said lag screw (60) and in that the apparatus also comprises means (90) for co-operation with said lag screw (60) and said sleeve (40) for applying sliding compressive forces to selected fractures of the femur by causing the lag screw (60) to slide within the sleeve (40).
Claim 2
Dependent Claim
67 words
Apparatus according to claim 1 further comprising a first engaging surface formed on the interior surface of said sleeve (40) and a complementary engaging surface formed on the exterior of said body member of said lag screw (60), said first and complementary engaging surfaces being configured to co-operate to prevent rotation of said lag screw (60) when said lag screw (60) is inserted in said sleeve (40).
Claim 3
Dependent Claim
22 words
Apparatus according to any one of the preceding claims wherein said rod includes a longitudinal bore (26) extending at least partially therethrough.
Claim 4
Dependent Claim
44 words
Apparatus as claimed in any preceding claim comprising engaging means (50) formed on the exterior of said sleeve (40) and a set screw (80) adapted for insertion through said bore (26) of said rod to lockingly engage said engaging means (50) on said sleeve.
Claim 5
Dependent Claim
27 words
Apparatus according to any preceding claim wherein the sleeve (40), is longer than the passage (28) extending through the intramedullary rod (20) for receiving the sleeve (40).
Claim 6
Dependent Claim
39 words
Apparatus according to any preceding claim wherein the means for co-operation with the lag screw (60) and the sleeve (40) is a compression screw (90) and the lag screw (60) is internally threaded for receiving the compression screw (90).
References Cited (Backward Citations)
No citation records indexed.
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