Interspinous fixation device

A fixation device and interspinous process technology, applied in the field of interspinous process fixation devices, can solve problems such as the loss of range of motion of spinal segments, and achieve the effect of avoiding fatigue fracture, avoiding damage, and occupying a small space

Pending Publication Date: 2017-05-31
SHANGHAI KINETIC MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fixation method is rigid fixation (also known as: strong fixation), that is, after a certain spinal segment is implanted with an implant, the spinal segment loses its normal range of motion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figures 1 to 3 As shown, this specific embodiment discloses an interspinous process fixation device, comprising: a first side plate 100, a second side plate 200, a third side plate 300 and a fourth side plate 400, wherein the first side plate 100 Opposite to the second side plate 200, the third side plate 300 is opposite to the fourth side plate 400, the first side plate 100 is connected to the third side plate 300, the second side plate 200 is connected to the fourth side plate 400, and the four sides There are multiple spikes for fixing the spinous process on each plate.

[0043] A first adjustment structure is provided between the first side plate 100 and the third side plate 300. In this embodiment, the first adjustment structure is an S-shaped elastic structure 710, and the S-shaped elastic structure 710 is directed along the first side plate 100. The connection direction with the third side plate 300 can be stretched, and the S-shaped elastic structure 7...

Embodiment 2

[0055] The structure of the interspinous process fixation device disclosed in the second embodiment is basically the same as that in the first embodiment, the difference lies in that the specific expression forms of the adjustment structures in the two embodiments are different.

[0056] In this embodiment, the adjustment structure is a keyway structure, and the keyway structure includes dot-shaped protrusions and strip-shaped grooves that cooperate with each other, and the dot-like protrusions are along the connection direction of the first side plate and the third side plate or the second side. The connecting direction of the plate and the fourth side plate slides in its corresponding elongated groove, the dot-shaped protrusion is arranged on the first connecting plate or the second connecting plate, and the elongated groove is correspondingly arranged on the first keyway or on the side wall in the second keyway. When the dot-shaped protrusion slides in the strip-shaped groo...

Embodiment 3

[0060] The structure of the interspinous process fixation device disclosed in the third embodiment is basically the same as that in the first embodiment, the difference lies in that the specific expression forms of the adjustment structures in the two embodiments are different.

[0061] In this embodiment, the adjustment structure is a keyway structure, and the keyway structure includes dot-shaped protrusions and strip-shaped grooves that cooperate with each other, and the dot-like protrusions are along the connection direction of the first side plate and the third side plate The connecting direction of the second side plate and the fourth side plate slides in the corresponding strip-shaped groove, the dot-shaped protrusion is arranged on the first screw or the second screw, and the strip-shaped groove is correspondingly arranged on the The first connecting plate or the second connecting plate. When the dot-shaped protrusion slides in the strip-shaped groove, the distance betw...

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PUM

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Abstract

The invention discloses an interspinous fixation device which comprises a first side plate, a second side plate, a third side plate and the fourth side plate. The first side plate and the second side plate are arranged face to face, the third side plate and the fourth side plate are arranged face to face, the first side plate is connected with the third side plate, the second side plate is connected with the fourth side plate, and the first side plate, the second side plate, the third side plate and the fourth side plate are each provided with multiple sharp thorn protrusions; the portion between the first side plate and the third side plate and the portion between the second side plate and the fourth side plate are each provided with an adjusting structure, wherein the adjusting structure is used for adjusting the translational degree of freedom between the first side plate and the third side plate or adjusting the translational degree of freedom between the second side plate and the fourth side plate. The fixation device is mainly used for limiting the extension and flexion degree of freedom, a certain degree of freedom is kept in the lateral bending and reversing direction, and additional movement, brought by fixation of an operation segment, of an adjacent segment is reduced.

Description

technical field [0001] The invention relates to the technical field of spinal repair medical instruments, in particular to an interspinous process fixation device. Background technique [0002] Nervous intermittent trekking is the most common typical symptom of lumbar spinal stenosis (LSS). The pain is relieved when the patient is sitting and flexed, and is worse when standing or walking. According to scholar ArnoldiCC, lumbar spinal stenosis can be divided into two categories, congenital spinal stenosis (ie, developmental spinal stenosis), acquired spinal canal stenosis (ie, acquired stenosis) and mixed spinal canal stenosis. [0003] In acquired lumbar spinal stenosis, intervertebral disc degeneration leads to compensatory physiological changes and degenerative pathological changes in the posterior facet joints and surrounding soft tissues, which is the root cause of spinal stenosis, and intervertebral disc degeneration is the root of all degeneration. The pathological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70
CPCA61B17/7061A61B17/7067A61B17/7074A61B2017/564
Inventor 蔡方舟丁伟
Owner SHANGHAI KINETIC MEDICAL
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