Intramedullary nail
AssigneeKoi Inc.
InventorHiroo Fujiwara
Life of this patent
Estimating the term…
Abstract
A lag screw for connecting a bone portion separated from the femur, by fracture, to the main portion thereof is fixedly secured in the separated bone portion and extends through main portion of the femur. A nail member is installed in the femur in order to fix the lag screw to the femur. The lag screw is secured in the nail member by a set screw inserted into an outer end of the nail member. In order to prevent the rotation of the separated bone portion about the lag screw, an auxiliary connector is inserted through the nail member between the lag screw and the set screw. The lag screw is clamped by the set screw via a spacer for transmitting a clamping force.
Claims4
An Intramedullary Nail, comprising:
- a bone connector for reunifying a fractured bone, wherein the fractured bone comprises a first bone portion and a second bone portion, said bone connector capable of extending through said first bone portion and secured in said second bone portion;
- a nail member capable of being installed in said first bone portion, said bone connector extending through said nail member;
- a set screw inserted into an outer end of said nail member, said set screw securing said bone connector in said nail member;
- a spacer disposed against the set screw for transmitting a clamping force from said set screw to said bone connector, said spacer having two legs extending therefrom, in a direction opposite the set screw, in spaced relation to each other, said legs engaging said bone connector;
- and
- an auxiliary connector extending through said nail member between said two legs of the spacer and between said bone connector and said set screw.
An Intramedullary Nail, comprising:
- a bone connector for reunifying a fractured femur, wherein the fractured femur comprises a first femur portion and a second femur portion, said bone connector capable of extending through said first femur portion and secured in said second femur portion;
- a nail member capable of being installed in said first femur portion, said nail comprising an end having a set bore disposed along its longitudinal axis and at least two transverse bores, said bone connector slideably inserted through one of said at least two transverse bores;
- a set screw inserted into said set bore for securing said bone connector in said nail member;
- an auxiliary nail connector extending through another of the at least two transverse bores of said nail member between said bone connector and said set screw;
- and
- a spacer disposed against the set screw for transmitting a clamping force from said set screw to said bone connector without interfering with said auxiliary connector, said bone connector having one or more grooves formed on a peripheral surface thereof, said spacer having two legs extending in a direction opposite the set screw, in spaced relation to each other, said two legs engaging said grooves, said auxiliary connector extending through said nail member between said two legs.
Dependencies are inferred from the claim text.