Proximal femoral anti-spinning intramedullary nail system

Abstract

The invention belongs to the field of medical instruments, and particularly relates to a proximal femoral anti-spinning intramedullary nail system. The proximal femoral anti-spinning intramedullary nail system comprises a main nail and a pressure nail, and further comprises at least one tension nail, wherein the main nail, the pressure nail and the tension nail form at least one triangular supporting structure; the pressure nail is connected with the tension nail in a penetrating manner; the main nail comprises a near end section and a far end section; the near end section is provided with a first nail hole and a second nail hole; the tension nail is fixed by the first nail hole; and the pressure nail is fixed by the second nail hole. The proximal femoral anti-spinning intramedullary nailsystem has the beneficial effects that the proximal femoral anti-spinning intramedullary nail system is consistent to the anatomic form of a femoral medullary cavity at a side position, the length ofthe main nail of a laterally bent proximal femoral anti-spinning intramedullary nail can be increased, and even can reach the total length of the femoral medullary cavity, the proximal femoral anti-spinning intramedullary nail system can be applied to fracture of a femoral shaft and multiple fractures of femur, and the application range is expanded; and coxa vara, femoral neck shortening, inward movement of a femoral part, rotational malformation of the head of femur and neck, internal fixation breakage, loosening and withdrawing of internal fixation of femoral head and neck, cutting-out of power screws or spiral blades, stress fracture of the femur and the like are prevented effectively.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to an anti-rotation intramedullary nail system at the proximal end of the femur. Background technique [0002] With the aging population in China, the number of intertrochanteric fractures in the elderly is gradually increasing, accounting for about 50% of hip fractures. The disease makes people lose the ability to move their lower limbs. Conservative treatment requires long-term bed rest. There are many complications, which seriously threaten the lives of patients. Elderly patients are often combined with osteoporosis, and the proportion of unstable intertrochanteric fractures after trauma gradually increases [2] . In the treatment of unstable intertrochanteric fractures, the failure rate of internal fixation is high, and the main internal fixation failure results include: helical blade cut out from the femoral head, coxa varus and femoral neck shortening deformity, fracture nonuni...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing intramedullary nailing system forms a lever-like structure after operation. When treating unstable intertrochanteric fractures, it can completely replace the bone tissue to bear the stress of loading. Poor shear performance

At the level of structural design, the existing intramedullary nail system does not pay attention to the replacement and reconstruction of the normal intertrochanteric part of the proximal femur and the composite structure of the pressure trabecular arm and the tension trabecular arm in the femoral head and neck bones. The importance of the stable support structure of the "ward triangle" formed by the tension trabeculae and the pressure trabeculae

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