Intramedullary nail fixation device for fractured near end of thighbone

Abstract

The invention provides an intramedullary nail fixation device for fractured near end of thighbone and relates to an intramedullary nail fixation device for processing fractured near end of thighbone; the intramedullary nail fixation device comprises a main intramedullary nail, a combined lock pin and a cortical bone screw; the main intramedullary nail is provided with a longitudinal shaft, a near end and a remote end with a tip end, the near end and the longitudinal shaft form a certain angle and are provided with a part for being connected to an insertion device; the near end comprises a through hole for assembling the combined lock pin, the through hole and the longitudinal shaft are intersected into an axis with 110-150 degrees; the remote end comprises a transverse long-waist through hole with axis and a transverse round through hole with axis, the through holes both can contain the cortical bone screw; the combined lock pin is provided with a head part, a lock pin remote end, a sleeve, a connecting block with internal thread screws matched with the connecting block with external thread screws, a symmetrical sliding plane, a raised clamping block and a nut cap with tooth form on the remote end surface; the shape of the head part is a spiral cutter shape, and the shape of the lock pin remote end is a tail part of the end surface with tooth form, and a platform is arranged on the lock pin remote end.

Description

technical field [0001] The invention relates to an intramedullary nail fixation device for proximal femur fractures, which relates to an intramedullary nail fixation device for treating proximal femoral fractures. Background technique [0002] The structure of the traditional intramedullary nail is that the proximal end is fixed with a screw, which is screwed into the femoral head and neck. Its disadvantage is that a single thick lag screw is used for fixation at the proximal end. In some cases of osteoporosis and unstable fractures, the screw cuts the femoral head. Collapse of the femoral neck screw, femoral neck screw fracture, femoral shaft fracture near the tail of the screw, etc. And the compression screw cuts the femoral head and osteoporosis and there may be potential rotation and shearing force at the fracture end. Another type of intramedullary nail is known from CN1378438A. This intramedullary nail adopts double nails to fix at the proximal end. They are lag scre...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of proximal femur fracture intramedullary nail fixation device for above-mentioned inadequacy, has solved above-mentioned complication and the problem of screw cutting out

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