Combined medullary needle for femoral fracture fixation

Abstract

The invention discloses a combined medullary needle for femoral fracture fixation. The combined medullary needle for femoral fracture fixation is characterized by comprising two medullary needle bodies which can penetrate into the femoral marrow along two ends of the femur and are detachably and fixedly connected to the interior of the femoral marrow in the axial direction. In a using process, only the near end of the medullary needle needs to be fixed through a lock pin, and the far end of the medullary needle does not need to be fixed through a lock pin, so that the usage amount of the lockpins is reduced, the damage to the bone due to the installation of the medullary needle is reduced, and the influence of the lock pins on an area near a fracture section is avoided. The combined medullary needle can be used in a combined mode and can also be used independently, thereby being high in universality.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a combined medullary nail for femoral fracture fixation. Background technique [0002] Femoral fractures in traumatic fractures are common fracture conditions, and delayed union, nonunion or malunion of fractures are prone to occur if the treated part is treated. For a long time, interlocking intramedullary nails have been used in the clinical treatment of tubular bone fractures for positioning and healing. Although intramedullary fixation combines biomechanical theory, it has firm fixation, early functional exercise, early weight bearing, prevention of bone shortening, and avoidance of axial and rotational deformities of fractures. However, interlocking intramedullary nails generally adopt an integrated structure of locking nails for static fixation at the distal and proximal ends of the intramedullary nail, which limits the axial pressure and stimulation of the fracture segment,...

AI Technical Summary

Problems solved by technology

However, interlocking intramedullary nails generally adopt an integrated structure of locking nails for static fixation at the distal and proximal ends of the intramedullary nail, which limits the axial pressure and stimulation of the fracture segment, and there is a certain dynamic shielding, resulting in Prolonged fracture healing period

Moreover, the end of the intramedullary nail is prone to stress concentration, which is easy to cause damage to the bone and the medullary needle at the penetrating part

Moreover, when using locking nails for fixation, for femoral fractures or multiple fractures, two medullary nails are often required to be fixed at the same time, so the distal and proximal ends of the two medullary nails need to be locked with locking nails, and the amount of locking increases. It is not conducive to the promotion of fracture healing, and at the distal end of the two medullary needles, it is generally close to the fracture segment area, which is not conducive to fixing with locking nails, and will aggravate the degree of fracture damage

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