Intervertebral space opening device and use method

Abstract

The invention discloses an intervertebral space opening device and a use method. The device is used for opening an intervertebral space in operations such as lumbar vertebra posterior-path spondylolisthesis reduction and bone graft fusion internal fixation. According to the scheme, the intervertebral space opening device comprises an intervertebral insertion and an opening clamp, the intervertebral insertion comprises an insertion body, a support part and a connector, and the opening clamp comprises a clamp head and a clamp handle; the support part is arranged at the rear end of the insertion body, the connector is arranged on the support part and used for being connected with the clamp head of the opening clamp, and the clamp head is provided with a groove matched with the connector. The intervertebral space opening device can easily and effectively open the intervertebral space, the inner width and the outer width of the opened space are similar, the phenomenon that the opened intervertebral space is narrow in front and wide in back can not occur, the problem that when an interbody fusion cage or a test mold is forcibly placed, end-plate fracture, interbody fusion cage collapse and the like occur is avoided, the operation process is accelerated conveniently for the operation, the operation time is shortened, the operation safety is improved, the success rate is increased, and then pain of patients is relieved.

Description

technical field [0001] The invention relates to the field of orthopedic medical instruments, in particular to an intervertebral space distraction device and a usage method. Background technique [0002] Lumbar spondylolisthesis is one of the more common orthopedic degenerative diseases clinically. It is a common and frequently-occurring disease in orthopedics. It is mostly caused by intervertebral disc degeneration or spondylolisthesis fracture. The most common symptom is pain, which can be manifested as low back pain , Sciatica. In general, the most effective treatment method is posterior lumbar decompression and spondylolisthesis reduction, intervertebral bone graft, fusion and internal fixation. For patients with obvious spondylolisthesis, the intervertebral space needs to be distracted during the operation to restore the spondylolisthesis. The traditional method of distraction is to drive pedicle screws into the pedicles of the two adjacent vertebral bodies respectively...

AI Technical Summary

Problems solved by technology

For patients with obvious spondylolisthesis, the intervertebral space needs to be distracted during the operation to restore the spondylolisthesis. The traditional method of distraction is to drive pedicle screws into the pedicles of the two adjacent vertebral bodies respectively. Then, the intervertebral space is enlarged by applying force to the tail of the pedicle screw. In practice, this method tends to cause the intervertebral space to form a narrow wedge at the front and wide at the back, and because of the obstruction of the instrument itself, it is not conducive to observation and subsequent related operations. , it is inconvenient to implement

Lumbar spondylolisthesis most commonly occurs in middle-aged and elderly people. Patients in this age group generally have poor bone quality. When the distraction force is large, the nail-bone interface is prone to loosening, which affects the holding force of the pedicle screws and sometimes causes the screws to loosen. , which directly affects the operation

Therefore, relying solely on pedicle screws is difficult to guarantee the quality of the operation in the face of some complicated situations. There is an urgent need for a disc space distraction device that can effectively distract the intervertebral space, complete follow-up operations more simply and effectively, and relieve patients' pain.

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