CN105877877A - Assembled type minimally invasive lumbar interbody fusion apparatus - Google Patents

Abstract

The invention discloses an assembled minimally invasive intervertebral fusion device for the lumbar spine, which comprises a part A provided with a dorsal front and rear card slot and a middle guide column, and a part A inserted on the back side of the A part with a ventral front and back card and a middle guide groove The part B of the fusion device; the part A of the fusion device is composed of a front-end guide part and a rear side body; the back side of the front-end guide part of the part A has a card slot opening to both sides, and the back side of the part A is in the middle of the back side A semi-cylindrical guide column is arranged, and upwardly opening draw-in grooves are arranged on both sides of the rear part of the back side. There are cards on both sides of the ventral side of the front end guide part of the B part of the fusion device, and there is a semi-cylindrical guide groove in the middle of the ventral side of the rear side of the B part, and there are elastic cards on both sides of the ventral rear part. The present invention adopts the split assembly design of the two parts of fusion device A and B. During use, the supporting handles can be used to hold the two parts of fusion device A and B in series, and the working catheter hammer through the intervertebral foramen mirror and the disc mirror Into the intervertebral space, when part A enters the intervertebral space and the rear end exits the working sleeve, turn the handle 180 degrees, so that the two parts A and B are hammered into the intervertebral space relative to each other up and down, so as to achieve intervertebral disc or intervertebral foramenoscopy. Interfusion.

Description

Assembled Lumbar Minimally Invasive Intervertebral Fusion Cage

technical field

The invention relates to a lumbar minimally invasive intervertebral fusion device.

Background technique

At present, the minimally invasive intervertebral fusion mainly deals with the target intervertebral space through a small incision, and implants the intervertebral fusion device filled with bone material into the intervertebral space. Due to the large size of the existing intervertebral fusion device, it is impossible to pass through the intervertebral disc or foramina. A working catheter is inserted into the intervertebral space. Therefore, although many experts use discoscopy, intervertebral foraminal decompression of the spinal canal, and intervertebral disc treatment, it is still impossible to carry out real minimally invasive intervertebral fusion under the microscope and under the tunnel.

Contents of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a minimally invasive lumbar intervertebral fusion device, which can facilitate intervertebral fusion under the microscope and under the channel.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

An assembled lumbar minimally invasive intervertebral fusion device, comprising a part A with dorsal front and rear card slots and a middle guide column, and a part B inserted on the back side of part A with ventral front and rear cards and a middle guide slot; The part A of the fusion device is composed of a front-end guide part and a rear side body; the back side of the front-end guide part of the part A has a card slot opening to both sides, and the back side of the part A has a semi-cylindrical column in the middle of the back side Shaped guide column, there are card slots opening upwards on both sides of the rear part of the back. There are cards on both sides of the ventral side of the front end guide part of the fusion device B, and there is a semi-cylindrical guide groove in the middle of the ventral side of the rear side of the B part, and there are elastic cards on both sides of the ventral rear part.

The width of parts A and B of the fusion device is 6mm, the length is 23mm, and the height is 4.5mm, 5.5mm, 6.5mm. mm).

Compared with the prior art, the beneficial effects of the present invention are:

The present invention adopts the separate assembly design of the fusion device. During use, the matching handles can be used to hold the two parts of the fusion device A and B in series, and hammer them into the intervertebral space through the working catheter of the intervertebral foramen mirror and the intervertebral disc mirror. When A After the part enters the intervertebral space and the rear end exits the working sleeve, turn the handle 180 degrees so that the two parts A and B are hammered into the intervertebral space relative to each other up and down, so as to realize the decompression of the spinal canal under the intervertebral disc or intervertebral foramen After treatment, intervertebral fusion with a working catheter forms a truly minimally invasive intervertebral fusion technique.

Description of drawings

Fig. 1 is the structural representation of A, B part of the present invention;

Fig. 2 is the schematic diagram of the serial grip of handles of A and B two parts of the present invention;

Fig. 3 is the assembly schematic diagram of the present invention;

Among them, 1. part A of the fusion device; 11. the lower slope of the guide part; 12. the upper slope of the guide part; 13. the front slot; 14. the guide column; 15. the rear slot; 16. the front block; 21. Front card; 22. Guide groove; 23. Rear card; 3. Matching handle; 31. Rear end of handle; 32. Fixing rod of part A of fusion device; 33. Thrust nut; 4. Working catheter.

detailed description

In the following, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, so as to understand the technical ideas claimed in the present invention more clearly.

As shown in Figures 1, 2, and 3, it is an assembled minimally invasive intervertebral fusion device of the present invention, which includes A part 1 with a dorsal front slot 13, a rear slot 15, a middle guide column 14, and an insertion Installed on the back side of part A 1, part B 2 is provided with ventral front card 21, rear card 23, and middle guide groove 22; the back side of the front guide part of part A has a card slot 13 open to both sides, and the card slot The front end has a front catch 16 so as to be interlocked with the guide part front card 21 of the B part, and prevent the B part from sliding forward; there is a semi-cylindrical segmented guide column 14 in the middle of the back side of the A part body, and The semi-cylindrical guide groove 22 in the middle of the ventral side of the B part body is matched to guide the precise assembly of the B part 2 and the A part 1, and interlock each other; there are upward openings on both sides of the rear end of the A part body. The rear card slot 15 is so as to be interlocked with the elastic rear cards 23 on both sides of the ventral rear part of the B part.

Preferably, the fusion device has two parts, A and B, so that the fusion device is divided into two parts and reaches the intervertebral space through a smaller working catheter, and assembled into an intervertebral fusion device meeting the height requirement in the intervertebral space. Both parts A and B of the cage are hollow and porous on both sides, which is convenient for filling bone material and bone growth and fusion.

Preferably, the back side of part A of the fusion device has an axial semi-cylindrical segmented guide post 14, and the front end of the guide post is located at the guide section of the fusion device and extends forward to form an upper slope 12 that lowers from the back up to the front. It forms a bullet shape with the lower slope 11 of the guide part of the fusion cage, which is convenient for entering the intervertebral space; it extends to both sides to form a front card slot 13, so as to interlock with the front card 21 of the fusion cage B part, and prevent the B part 2 from moving forward, upward, and to both sides. side out. After the middle and rear sections of the semi-cylindrical guide post 14 enter the intervertebral space in the A part 1, there is an intervertebral distraction effect, which reserves a space for the B part 2 to enter the intervertebral space; The ventral guide groove 22 matches, and can guide the B part 2 to move forward accurately on the back side of the A part 1, and successfully assemble; after assembly, the dorsal guide post 14 of the A part 1 and the ventral guide groove 22 of the B part are interlocked.

Preferably, both sides of the rear end of the fusion device A part 1 have rear card slots 15 with openings upward, so as to interlock with the elastic cards 23 on both sides of the ventral rear part of the B part 2, so as to prevent the B part 2 from retreating and falling out; the card slots The rear wall is designed to sink, so that part B 2 starts to slide to the back side of part A 1 .

During use, parts A and B of fusion device 1 and 2 are fixed on the supporting handle 3 in series, with part A in front of part B and rear of part 2; the user holds the handle 3 and delivers the fusion device through the working catheter 4 At the edge of the intervertebral space, use a hammer to hammer the rear end 31 of the handle to hammer part A of the fusion cage into the intervertebral space; take the fixing rod 32 of part A of the fusion cage as the axis, and turn the handle 3 about 180 degrees to turn the fusion part B2 to fusion Part A of the cage is opposite to the face, and the rear end 31 of the handle is still hammered with a hammer to hammer the part B of the cage into the intervertebral space, or combined with tightening the thrust nut 33, and the part B of the cage is pushed to follow the guide groove 22 along the part A of the cage The guide column 14 slides forward, and finally the fusion device B part 2 is assembled with the fusion device A part 1, and the front and rear cards 21, 23 and guide grooves 22 of the fusion device B part are connected with the front and rear card slots 13, 23 of the fusion device A part 1. 15 and guide post 14 are interlocked.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the present invention scope of protection claimed.

Claims (7)

1. An assembled lumbar minimally invasive intervertebral fusion device is characterized in that said intervertebral fusion device comprises two parts of intervertebral fusion device A and B that match each other and are interlocked, and the intervertebral fusion device is made of tantalum metal become. Both parts A and B of the fusion device are composed of a front-end guide part and a rear-side body part. 2. The A part of fusion device as claimed in claim 1, characterized in that: the 3mm length of the front end guide part is set as a wedge shape with the front section gradually decreasing, and a guide column is arranged in the middle of the back side, and the guide column moves from the front to the rear. The slope body is gradually lowered forward, and the two sides of the slope body have concave arc-shaped draw-in grooves. 3. Part A of the fusion device as claimed in claim 1, characterized in that: there is a semi-cylindrical segmented guide column in the middle of the back side of the rear body, and the front ends of the guide column are slopes that gradually increase from front to back, and the front section guides The rear end of the post is a hemisphere, and the rear end of the guide post in the rear section has a screw port. 4. The part A of the fusion device according to claim 1, characterized in that: there are slots opening upwards on both sides of the rear part. 5. Part B of fusion device as claimed in claim 1, characterized in that: the 3 mm length of the front end guide part is set as a wedge shape with the front section gradually decreasing, and the ventral side of the guide part has an arc-shaped slot matching the guide part of part A The wraparound design forms the sides front card. 6. The part B of the fusion device according to claim 1, characterized in that: there is a semi-cylindrical segmented guide groove in the middle of the back side of the rear body. 7. The part B of the fusion device according to claim 1, characterized in that: there are elastic back cards on both sides of the ventral rear part.