Device for spreading spinous process

Abstract

The invention discloses a device for spreading the spinous process, which comprises a support component and side pieces arranged at both ends of the support component, wherein the support component comprises a sleeve rod, a sleeve post and a sleeve barrel, the sleeve post is sleeved on the sleeve rod, the sleeve barrel is sleeved on the sleeve post, and one end of the sleeve rod is fixed on a first side piece after penetrating through the sleeve post and the sleeve barrel; the other end of the sleeve rod is fixedly provided with a second side piece. With the structures of the sleeve barrel and the sleeve post redesigned, the device can adapt to the change of the vertebral condyle, has larger contact area with the condyle and can also carry out proper fine adjustment according to the movement of the position of the vertebral condyle after operation to achieve an optimal spreading effect.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a spinous process distracting device suitable for lumbar spinal canal stenosis. Background technique [0002] Lumbar spinal stenosis refers to various forms of spinal canal, neural canal, and intervertebral foramen stenosis, as well as a series of low back pain and a series of neurological symptoms caused by changes in the volume of the spinal canal caused by soft tissues and stenosis of the dural sac itself. Appears, medically known as lumbar spinal stenosis. [0003] Medically, the treatment of this kind of symptom usually involves implanting pedicle screws to open the intervertebral gap, or implanting artificial intervertebral disc fillers to block the intervertebral space, to raise the intervertebral space of the spine, and to open the gap between the neural foramina; An artificial spinous process distraction device was implanted. [0004] The spinous process distraction devi...

AI Technical Summary

Problems solved by technology

But this kind of structure is more complicated. The side pieces at both ends are fixedly connected by hooks, so that after the main part is fixed in the middle of the two vertebral joints, there is no adjustment gap. If the fixing position is wrong, the patient can only endure the pain of the wrong position or undergo another operation. It is troublesome to adjust

[0008] The spinous process distracting device 10 of the third structure, such as figure 2 As shown, it includes a main part 11 and side panels 12 at both ends. A sleeve 13 similar to a hollow square column is sleeved on the main part 11. When in use, the sleeve 13 is used to spread the vertebral joints on both sides. This structure The disadvantage is that the shape of the sleeve is difficult to adapt to the changes of the vertebral joints, and the contact area with the vertebral joints is relatively small, so that the local stress on the spinal joints is relatively large, and at the same time it is difficult to flexibly adjust the best distraction position

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