Osteosynthesis auxiliary for the treatment of subtrochanteric, peritrochanteric, and femoral-neck fractures
First Claim
1. A femoral neck part, for use with an intramedullary locking nail having a passageway transverse and slanted with respect to the longitudinal axis of said nail through which said part can be driven for the treatment of a femoral neck fracture, said part comprising:
- a generally elongate body with a longitudinal axis and having a central bore extending along said axis for receiving a guide wire;
a distal blade portion and a proximal portion for engagement in said passageway;
said distal portion comprising a distal end having chisel-like surfaces to facilitate passage of the part into the neck of a femur, in use, and a plurality of blade surfaces extending substantially parallel to said axis of said body;
said proximal portion having a generally rectangular cross-section and, adjacent its proximal end, a projecting portion extending beyond said cross-section to limit the extent to which said part can be driven through said passageway, in use.
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Accused Products
Abstract
Osteosynthesis auxiliary (10) for the treatment of subtrochanteric, peritrochanteric and femoral-neck fractures, with a locking nail (12) that can be introduced from the proximal end into the medullary space of a femur (11) and that comprises a distal section (15) having at least one oblong cross bore (13) to receive a distal locking element as well as a proximal section (14) having a slanted passageway (16), and with a femoral-neck part (19) that can be introduced from a lateral position through the slanted passageway (16) into the neck (17) and head (18) of the femur, wherein at least the section of the femoral-head part that can be anchored in the head (18) of the femur has a cross section that is not circular or rotationally symmetrical Preferably this section (34) has the shape of a double-T or I profile (35). At the end away from the head (18) of the femur the femoral-neck blade (19) also comprises a radially projecting collar (33) to limit the lateral extent to which the femoral-neck blade (19) can be inserted into the- passageway (16) through the locking nail (12).
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Citations
44 Claims
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1. A femoral neck part, for use with an intramedullary locking nail having a passageway transverse and slanted with respect to the longitudinal axis of said nail through which said part can be driven for the treatment of a femoral neck fracture, said part comprising:
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a generally elongate body with a longitudinal axis and having a central bore extending along said axis for receiving a guide wire; a distal blade portion and a proximal portion for engagement in said passageway; said distal portion comprising a distal end having chisel-like surfaces to facilitate passage of the part into the neck of a femur, in use, and a plurality of blade surfaces extending substantially parallel to said axis of said body; said proximal portion having a generally rectangular cross-section and, adjacent its proximal end, a projecting portion extending beyond said cross-section to limit the extent to which said part can be driven through said passageway, in use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A femoral neck blade for placement in the neck of a femur for the treatment of fractures thereof, said blade comprising:
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a distal blade portion and a proximal fixation portion; said blade portion having a generally I-shaped cross-section to facilitate passage into the neck of a femur while maximizing resistance to twisting when in place therein; said proximal portion having a nonrotationally symmetrical cross-section for mating with a correspondingly-shaped passage through a femoral locking nail, to that in use, said blade is held within said locking nail fixed against rotation, said proximal portion further comprising a projecting portion to limit the travel of said blade through said passageway, in use, said projecting portion comprising a circumferential collar. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 22)
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21. A femoral neck blade as claimed in claim 21, wherein said outer surfaces are curved.
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23. A method of treating femoral fractures, which comprises the steps of:
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boring a hole in the femur; aligning a femoral neck part with said hole, said femoral neck part comprising a generally elongate body with a longitudinal axis, a distal blade portion and a proximal portion, said distal portion comprising a distal end having chisel-like surfaces to facilitate passage of the part into the femur and a plurality of blade surfaces extending substantially parallel to said axis of said body, said proximal portion having a generally rectangular cross-section and, adjacent its proximal end, a projecting portion extending beyond said cross-section; and driving said femoral neck pat into said hole, said projecting portion limiting the extent to which said part enters said hole. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of treating femoral fractures, which comprises the steps of:
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boring a hole in the femur; aligning a femoral neck blade with said hole, said blade comprising a distal blade portion and a proximal fixation portion, said blade portion having a generally I-shaped cross-section, said proximal portion having a nonrotationally symmetrical cross-section, said proximal portion comprising a projecting portion, said projecting portion comprising a circumferential collar; and driving said femoral neck blade into said hole, said projecting portion limiting the extent to which said blade enters said hole and said I-shaped cross section facilitating passage into the femur while maximizing resistance of the blade to twisting therein. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification