An extendable spinal internal fixation device for laterally fixing bone position

Abstract

The invention provides an extensible spinal internal fixation device for laterally fixing the bone position, which includes a sleeve and a restraint rod axially penetrated in the sleeve, the restraint rod is connected with a traction rope, and the sleeve wall is axially opened. There is a rope groove for the pulling rope to slip in and out, and an observation window for observing the movement of the restraint rod. Both the sleeve and the restraint rod are made of titanium alloy. The restraint rods include a fixed rod fixedly connected to the sleeve and a growth rod that slides and fits with the sleeve, and the growth rod and the fixed rod are arranged in parallel; there is another solution, the growth rod includes a first growth rod and a second growth rod, The first growth rod is arranged parallel to the second growth rod. There is a mechanism for fixing the traction rope on the restraining rod. The present invention has the following advantages and effects: the scheme utilizes the cooperation between the sleeve, the restraining rod and the traction rope, which not only achieves the effect of fixing the spine, but also achieves the effect of not hindering the normal growth of bones.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an extensible spinal internal fixation device for laterally fixing the bone position. Background technique [0002] The coronal, sagittal or axial position of the spine deviates from the normal position, resulting in morphologically abnormal performance, which is called spinal deformity. Patients suffering from spinal deformity usually require surgery and internal fixation of the spine to achieve a good therapeutic effect. [0003] Commonly used internal fixation devices, such as traditional growing rods, cannot be self-extended, and surgical treatment is required to adjust the length of the growing rods. Especially for children with early-onset scoliosis, if traditional growth rods are used for fixation, surgery is required every 6 months. Frequent surgical treatments not only cause serious physical and mental harm to patients, but also impose excessive financial burdens on ...

AI Technical Summary

Problems solved by technology

[0005] But this kind of restraint rod also has many obvious disadvantages

The in vitro control failure rate of the magnetically controlled rod is high, and the growth rod cannot be extended with the control; and this kind of growth rod lacks lateral restraint, which leads to the aggravation of scoliosis deformity; Calm, not only the impact on the patient's body is not yet clear, but also brings a lot of inconvenience to the patient's life

Patients need to pay attention at all times and avoid contact with metal and magnetic objects to prevent injury from magnetic attraction, but this is difficult to achieve in modern life

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