EP0457464A1
Expired / Lapsed
EP
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Prosthetic intramedullary femoral prosthesis with preformed sheath
Assignee: Stryker Ireland Ltd
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Filing: 1991-05-01
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Granted: —
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Expires: 2011-05-01
Abstract
Abstract A prosthetic intramedullary femoral prosthesis (1) provided with a separate preformed sheath (9) made from an acrylic material which is dimensioned to enclose the prosthesis stem (4) from the distal tip (10) to a location on the stem (4) which will be adjacent the proximal cut end (6) of the femur (5) with which it will be used.
Inventors
- 👤 Jacques Vanderlinden
- 👤 Peter Lawes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:23
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/30721; A61F2/30724; A61F2/30767; A61F2/30907; A61F2/3676; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30565; A61F2002/30571; A61F2002/30579; A61F2/30771; A61F2002/30878; A61F2002/30919; A61F2/46; A61F2002/4631; A61F2310/00; A61F2310/00005; A61F2310/00353; A61F2310/00389; A61F2310/00952
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A prosthetic intramedullary femoral prosthesis provided with a separate perforated sheath made from an acrylic material which is dimensioned to enclose the prosthesis stem from the distal tip to a location on the stem which will be adjacent the proximal cut end of the femur with which it will be used.
Claim 2
Dependent Claim
29 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 1 in which the sheath is dimensioned and constructed to allow the stem to move further into it under load.
Claim 3
Dependent Claim
58 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 3 in which the distal end of the sheath is in the form of a cup the inner end surface of which is spaced away from the distal end of the prosthesis stem to provide a void when initially located in position, to accept subsequent inward movement after fitting.
Claim 4
Dependent Claim
27 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 3 in which the sheath is made from a material similar to bone cement, eg. polymethylmethacrylate.
Claim 5
Dependent Claim
26 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 4 in which the sheath has a thickness of between 1/2 mm and 2 mm.
Claim 6
Dependent Claim
21 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 5 in which the sheath has a thickness of substantially 1 mm.
Claim 7
Dependent Claim
39 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 6 in which said sheath is provided with means for centralising the prosthesis stem in the intramedullary canal of the femur with which it is to be used.
Claim 8
Dependent Claim
21 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 7 in which the centralising means include outwardly projecting resiliently deformable abutments.
Claim 9
Dependent Claim
29 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 8 in which the resilient abutments are in the form of resilient wings, fins or arms which can deform inwardly.
Claim 10
Dependent Claim
19 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 9 in which the abutments can deform substantially radially inwardly.
Claim 11
Dependent Claim
18 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 9 in which the abutments can deform circumferentially inwardly.
Claim 12
Dependent Claim
19 words
A perforated sheath for use with an intramedullary femoral prosthesis as claimed in any one of the preceding claims.
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