Patent ID: 7850690

Claim:
A device for the treatment of femoral fractures comprising: an intramedullary nail having a central longitudinal axis, a proximal portion, a distal portion configured and dimensioned for insertion into the medullary canal of a femur, and a passage through the proximal portion, the passage having a non-circular cross-section and a central axis that forms a non-perpendicular angle with respect to the central longitudinal axis of the nail; a sliding sleeve configured and dimensioned for insertion through the passage in the nail, the sleeve having a central longitudinal bore, a first end, a second end, an external jacket surface, and an internal jacket surface, where at least a portion of the external jacket surface of the sliding sleeve has a non-circular cross-section that mates with the non-circular cross-section of the passage to prevent rotation of the sliding sleeve with respect to the nail while permitting translation of the sliding sleeve with respect to the nail; and a bone fixation element having a longitudinal axis, a head portion configured and adapted to engage bone in the head of the femur, and a shaft portion configured and dimensioned for insertion into the central longitudinal bore of the sliding sleeve, wherein the shaft portion of the bone fixation element is configured and adapted to be freely rotatable with respect to the sliding sleeve when received through the sliding sleeve in a first position and rotationally locked with respect to the sliding sleeve when received through the sliding sleeve in a second position.