Surgical device for connection of fractured bones
First Claim
1. A surgical device for percutaneous connection of a fractured upper part of a femur to a femur shaft of a patient, comprising the following components to remain in the body of the patient:
- a bar-shaped connector plate having an axis, an inner surface to be placed onto the femur, an outer surface, a head portion and a bottom provided with a sharpened end for insertion of said bar-shaped connector plate through a small incision in the skin of the patient, said bar-shaped connector plate being provided in a lower portion thereof with at least two countersunk, through-going bores and in an upper portion thereof with two adjoining oblique, screw-threaded bores directed in an upward direction at an angle of about 130°
, a screw-threaded bore perpendicular to the axis of said bar-shaped connector plate being provided in said head portion,two long screws, each screw having a straight shaft, a wood-screw-shaped inner end for insertion into said fractured upper part of the femur and an outer end coaxially recessed with a polygonal shape, said recess being continued by a screw-threaded bore concentric with an axis of said shaft,a sleeve of a shorter length than said screw, with the outer end of said screw being positioned in said sleeve in a manner so as to be movable in both axial and rotational directions in the sleeve, the sleeve having an outer end provided with a screw-thread corresponding to the screw thread in said oblique bores in said bar-shaped connector plate and with at least two recesses for engagement of a screwdriver, andat least two shorter screws for securing said bar-shaped connector plate to the femur shaft, said at least two shorter screws extending through said countersunk, through-going bores into bone material of the femur shaft.
4 Assignments
0 Petitions
Accused Products
Abstract
A surgical device for percutaneous connection of a fractured upper part of the femur to the shaft comprises: a connector plate with a lower straight portion for screwed connection to the femur shaft and with a sharp bottom end for insertion through a small skin incision, having its upper portion perforated by two oblique, tapped bores for fixation of two long screws serving for connection of the fractured parts. Each screw has a wood-screw-shaped inner end and a cylindrical shaft with a hexagonal recess at its outer end which is continued by a tapped bore. Each screw is slidingly positioned in a sleeve which has its outer end slotted and screw-threaded for fixation in the oblique bores of the plate. The connector plate is positioned and fastened to the femur by an angular connector arm composed of a short horizontal arm for firm perpendicular connection to the top of the plate by a long screw, and a vertical portion parallel to the plate provided with bores coaxial with the bores in the plate for guidance of the screws. A screwdriver contains a central shaft having a screw-threaded inner end for engagement with the tapped bores in the screw ends, an intermediate tubular shaft having its inner end hexagonally shaped for engagement with the recesses in the screw ends, and an outer tubular shaft provided with teeth for engagement with the slots in the sleeve ends. All three shafts can be independently rotated and axially moved by separate grips at the outer end of the screwdriver.
334 Citations
16 Claims
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1. A surgical device for percutaneous connection of a fractured upper part of a femur to a femur shaft of a patient, comprising the following components to remain in the body of the patient:
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a bar-shaped connector plate having an axis, an inner surface to be placed onto the femur, an outer surface, a head portion and a bottom provided with a sharpened end for insertion of said bar-shaped connector plate through a small incision in the skin of the patient, said bar-shaped connector plate being provided in a lower portion thereof with at least two countersunk, through-going bores and in an upper portion thereof with two adjoining oblique, screw-threaded bores directed in an upward direction at an angle of about 130°
, a screw-threaded bore perpendicular to the axis of said bar-shaped connector plate being provided in said head portion,two long screws, each screw having a straight shaft, a wood-screw-shaped inner end for insertion into said fractured upper part of the femur and an outer end coaxially recessed with a polygonal shape, said recess being continued by a screw-threaded bore concentric with an axis of said shaft, a sleeve of a shorter length than said screw, with the outer end of said screw being positioned in said sleeve in a manner so as to be movable in both axial and rotational directions in the sleeve, the sleeve having an outer end provided with a screw-thread corresponding to the screw thread in said oblique bores in said bar-shaped connector plate and with at least two recesses for engagement of a screwdriver, and at least two shorter screws for securing said bar-shaped connector plate to the femur shaft, said at least two shorter screws extending through said countersunk, through-going bores into bone material of the femur shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification