Femoral shaft fracture internally fixing instrument

Abstract

The invention belongs to the field of medical apparatus and instruments, and relates to a femoral shaft fracture internally fixing instrument, which comprises a lockable steel plate and an aiming assembly of the lockable steel plate, wherein the lockable steel plate comprises a steel plate, a single lock, a linkage lock and a lock nail; the aiming assembly comprises a single lock aiming fixator and a linkage lock aiming fixator; an auxiliary assembly bone nail, a bone nail hole positioning hook and a combined screwdriver. In the femoral shaft fracture internally fixing instrument, an arc which corresponds to the forward physiological curve of a femoral shaft is designed on the steel plate longitudinally; an arc which corresponds to the transverse diameter of the femoral shaft is designed transversely near a bone surface, so that the arc is put in the middle of the fracture position along an arc line of the femoral shaft to contact bones in a limited mode; and the lateral surface is circular arc curved surfaces which are distributed symmetrically and uniformly. The linkage lock strides over a fracture line on the inner side of the femoral shaft, and the single lock is away from the fracture line; and the aiming assembly is used for aiming, fixing, drilling and assembling, and is easy to operate. The femoral shaft has the advantages that the fixation is stable, postoperative additional fixation is avoided, functional exercise can be performed in early stage, and the union of fracture is facilitated, and internal fixtures are convenient to dismantle after union.

Description

technical field [0001] The invention belongs to the field of medical devices and is an internal fixation device for femoral shaft fractures. Background technique [0002] The femur is the longest tubular bone in the human body. It is one of the main load-bearing bones of the lower limbs. When directly or indirectly subjected to violence that exceeds its own strength and elastic strength, it is prone to deformation and fractures. If the treatment method is not selected properly, it can cause long-term loss of use or disability. At present, clinically, children are often treated with conservative treatment such as bone traction, splint external fixation, and plaster external fixation, while adolescents and adults are often treated with surgical treatment such as metal plates, intramedullary nails, interlocking intramedullary nails, and external fixation brackets (A.H. Crenshaw. Campbell's Encyclopedia of Orthopedic Surgery [M]. Shanghai: Shanghai Translation and Publishing Com...

AI Technical Summary

Problems solved by technology

At present, the steel plates used clinically for femoral shaft fractures are all the above-mentioned types. Due to the restriction of the sagittal and coronal physiological arcs of the femur, the steel plates cannot be placed in the center of the femoral arc, and cannot be in full contact with the bone surface, resulting in unstable fixation. , there may be bending, breaking, and screw pulling out, resulting in fracture displacement and angulation, and often requires additional external fixation, which affects the shortcomings of early functional exercise

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