An interspinous process fixation system

Abstract

The present invention relates to a novel interspinous process fixation system, comprising an interspinous process fixer and a delivery device, the interspinous process fixer includes a flexible and foldable pouch (100) and a filling material (200), the pouch The proximal end is provided with an injection port (110), the delivery device includes a delivery tube (310), the injection port (110) is detachably connected to the distal end of the delivery tube (310), and the filling material (200) passes through the delivery tube (310) and the injection port (110) inject and stretch the sac to form the interspinous process fixer, the part of the interspinous process fixer located between the two spinous processes forms a support section, and The part of the side protrudes and restricts the movement of the interspinous process fixer between the spinous processes. The purpose of the present invention is to transport the novel interspinous process fixer to the interspinous process and then release it through a minimally invasive method, and then inject filling material to realize the interspinous process fixation, realize minimally invasive interventional treatment, and cause little trauma to the patient.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an interspinous process fixation system. Background technique [0002] Lumbar instability is a common clinical disease, and its early changes are often only due to the internal structure disorder of the intervertebral disc or degenerative discogenic low back pain; as the disease progresses, vertebral bone hyperplasia, facet joint degeneration and jaundice will appear. Ligament hypertrophy, etc., which in turn lead to spinal instability and lumbar spinal stenosis, mechanical lumbar pain and lumbar spinal stenosis. Surgery is often required when conservative treatment fails. The traditional surgical method is fusion, but studies have shown that long-term clinical follow-up is not very ideal. The main reason is that fixation and fusion destroy the biomechanical properties of the lumbar segment, resulting in load transmission that does not conform to the original physiological co...

AI Technical Summary

Problems solved by technology

[0005] However, whether it is X-stop, Wallis, Coflex or DIAM, the surgical methods mentioned in the relevant clinical literature are all implanted through open surgery, which is complicated and greatly increases the risk and pain of the patient.

In addition, although some interspinous process fixers such as In-space and Superion can be implanted in a minimally invasive way, the incision is still more than 2cm

[0006] In addition, fixers made of metal materials, such as X-stop, are much stronger than spinous processes, which can easily cause stress shielding, resulting in complications such as spinous process rupture

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