A minimally invasive fusion device

Abstract

The invention discloses a minimally invasive fusion device, which comprises a foldable or telescopic mesh bag, and a connecting head which can communicate with the outside is arranged at the proximal end of the mesh bag; material; and / or a tubular lining core is arranged inside the mesh bag, an outlet is opened on the lining core, and its proximal end communicates with the connector, and the far end is fixed to the far end of the mesh bag; and / or the internal distal position of the lining core A sealing device is provided; the inner hole or outlet of the connector is blocked by changing the position of the filling material injected into the mesh bag, and / or the sealing device resets to block the outlet under the action of its own elasticity. The minimally invasive fusion device provided by the present invention can be self-sealed after the net bag is filled, and the sealing treatment of the net bag can prevent the bone filling material from leaking out and affect the fusion effect, and the automatic sealing simplifies the operation, shortens the operation time, and improves the operation efficiency. safety.

Description

technical field [0001] The invention relates to the field of spinal intervertebral fusion, in particular to a minimally invasive fusion device. Background technique [0002] Degenerative diseases of the spine and its structural damage are an important cause of neck, shoulder, waist, and leg pain, sensory and motor function impairment or even loss. In the 1950s, Cloward first proposed Posterior Lumbar Fusion (PLIF), which has developed into one of the basic procedures of spinal surgery today. In 1986, Badgy and Kuslich designed an intervertebral fusion device (Cage) suitable for the human body, namely the BAK system. Since then, intervertebral bone graft fusion technology has been greatly developed and has become a basic surgical method for the treatment of spinal degenerative diseases and structural injuries. [0003] The principle of the intervertebral fusion device is centered on the diseased intervertebral space. After the intervertebral fusion device is implanted, the ...

AI Technical Summary

Problems solved by technology

Although the height of this mechanism can be raised, it is not scalable in the width direction. If you want to pass through the slender working channel of the endoscope, the width must be narrow, and the length is limited by the size of the vertebral body. The final contact area with the upper and lower endplates Relatively small, resulting in excessive local pressure of the vertebral body, which will cause the fusion cage to sink into the interior of the vertebral body for a long time

[0008] It can be seen from the above that in the existing intervertebral fusion surgery, some fusion cages do not have good mechanical support and need to be filled with self-coagulating materials to achieve the purpose of mechanical support. The amorphous shape of self-coagulating materials often leads to poor surgical results , and then a second operation is required, which brings a heavy burden to the patient; in the mechanical structure of the minimally invasive fusion device in the existing patent, it can only realize the variable height direction or the variable width direction. The two are incompatible in terms of vertebral body contact area, and the mechanical structure limits the space for bone grafting, which affects the fusion effect; in addition, most of the fusion cages used in intervertebral fusion surgery are fixed in shape, large in size, and difficult to implant. Larger access channels are required, and the patient is more injured

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