Pedicle screw capable of achieving infusion and fixing system thereof

Abstract

The invention discloses a pedicle screw capable of achieving infusion. The pedicle screw is characterized by comprising a hollow screw tube and a U-type near end. The side wall of the far end of the screw tube is provided with asymmetric outlet holes, that is, the number of the outlet holes is not uniform or the diameters of the outlet holes are different, so that after the screw tube is inserted into an vertebral arch pedicle, the number or the diameter of the outlet holes in the side wall, facing an vertebral arch pedicle body, of the screw tube is larger than that of the outlet holes in the upper and lower sides, facing the height direction of the vertebral arch pedicle body, of the screw tube. The fixing mode is reliable and stable, and an existing pedicle screw supported and fixed through local stress of the vertebral arch pedicle is avoided. An existing syringe can be used in a fixing system so that the syringe can be detachably connected with the pedicle screw conveniently and quickly in a threaded mode through a connector, other auxiliary supporting and locating devices are not needed, the syringe and the connector can be repeatedly used, and the cost is reduced.

Description

technical field [0001] The invention relates to a perfusion pedicle screw and its fixation system, belonging to the technical field of medical instruments. Background technique [0002] Pedicle internal fixation using pedicle screw system is a minimally invasive surgical method for the treatment of common spinal diseases such as lumbar fractures, spinal stenosis, and spondylolisthesis. This approach requires surgery at the patient's vertebral level, placing multiple pedicle screws (eg figure 1 ) threaded distal thread into the vertebral body of the pedicle (eg figure 2 ), the connecting rod is fixed by the U-shaped proximal end of multiple pedicle screws, and the patient's vertebral segment is supported by the connecting rod. For some patients with osteoporosis, the bone tissue cannot bear this kind of fixation for a long time. If this kind of pedicle screw fixation is adopted way, will bring potential hidden dangers and risks. Contents of the invention [0003] The t...

AI Technical Summary

Problems solved by technology

This approach requires surgery at the patient's vertebral level, placing multiple pedicle screws (eg figure 1 ) threaded distal thread into the vertebral body of the pedicle (eg figure 2 ), the connecting rod is fixed by the U-shaped proximal end of multiple pedicle screws, and the patient's vertebral segment is supported by the connecting rod. For some patients with osteoporosis, the bone tissue cannot bear this kind of fixation for a long time. If this kind of pedicle screw fixation is adopted way, will bring potential hidden dangers and risks

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