A minimally invasive decompression and fusion system for posterolateral lumbar spine

Abstract

The invention relates to a lumbar vertebra posterior-lateral minimally invasive decompression and fusion system. The lumbar vertebra posterior-lateral minimally invasive decompression and fusion system comprises a guider, a protective sleeve, a trephine, a holder and a fusion cage; the guider is provided with a guider handle, a guider connecting rod detachably connected with the guider handle, a guide block arranged on the guider connecting rod and an opening head connected to the lower end of the guider connecting rod; a baffle and an anchoring nail arranged on the protective sleeve; a trephine handle and a work sleeve with the jagged lower edge are arranged on the trephine; the guide block is sleeved with a work sleeve, and the work sleeve is sleeved with the protective sleeve; a holder handle and holder connecting rod connected with the holder handle and provided with a drainage channel in side are arranged on the holder; a fusion cage body is arranged on the fusion cage, a fastening channel and a nail path for assembling and fixing nails are formed in the fusion cage body, and the holder connecting rod and the fusion cage are connected in a fastened mode. The device is used for lumbar vertebra decompression and is better in fusion effect, easier to operate, minimally invasive and small in damage.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a posterolateral minimally invasive decompression and fusion system for the lumbar spine. Background technique [0002] Lumbar fusion is a basic technique for the treatment of lumbar disorders, applicable to: vertebral destructive diseases, such as spinal tuberculosis or spinal tumors, which cause damage to one or several vertebrae; loss of spinal stability, such as spinal injury, degeneration, vertebral Instability of the spine from destruction or surgery; displacement or slippage with pain and dysfunction; prevention or correction of deformity; cooperation with corrective surgery. [0003] In lumbar fusion, the lumbar intervertebral joints are osseointegrated through anterior and posterior lumbar surgery in facet joints, intertransverse process bone grafts, and intervertebral bone grafts, thereby establishing and maintaining lumbar spine stability. Bone graft fusion pl...

AI Technical Summary

Problems solved by technology

Although this traditional surgical method has good clinical effect, it has the following disadvantages: 1. The operation is cumbersome, and the intervertebral space is processed in turn with nucleus pulposus forceps, spreader, scraper, and reamer. This step usually requires 3-4 cycles; 2. It is difficult to handle the bone graft bed in young patients and patients with osteoporosis; 3. If the implanted intervertebral fusion device is too small, it will easily prolapse backwards; if it is too large, it will easily damage the nerve and cause postoperative axial pain; 4. The posterior approach For intervertebral fusion, it is necessary to remove part of the appendage bony structure, resulting in iatrogenic instability. It is necessary to cooperate with the posterior screw-rod system to increase stability, which increases the complexity, risk and cost of the operation to a certain extent.

Lateral interbody fusion achieves indirect decompression by opening the intervertebral space. Although it does not damage the posterior structure of the lumbar spine, it still has the problem of cumbersome operation and has unique complications of lumbar plexus injury.

Therefore, there is an urgent need for a lumbar interbody fusion method and related instruments that can obtain good fusion effects and are easier to operate, but there are no relevant reports so far

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