CN110693631B - A reverse intervertebral intervertebral fusion device under endoscopy - Google Patents

Abstract

The invention discloses an upside-down insertable intervertebral foramen endoscopic intervertebral fusion device, which belongs to the field of surgical instruments and includes a handle, a connecting rod, a sleeve rod, and a fusion device body. Two fixing rods for fixing the fuser body; the fuser body is a bullet-shaped structure, the upper and lower surfaces of the fuser body are provided with inverted teeth, the two sides of the end of the fuser body are also provided with fixing grooves, and the center of the end of the fuser body is opened There are threaded grooves, one end of the hollow part of the connecting rod is a fork fixing component, and the solid part of the connecting rod has external threads, which can be connected with the fusion device. After the hollow part of the connecting rod is connected with the fusion device body, it can be inserted into the spinal endoscopic instrument channel upside down , the solid part of the connecting rod with the handle is inserted into the end of the cage from the hollow part of the connecting rod through the rear end of the endoscopic instrument channel, and its external thread is connected with the internal thread of the cage. The present invention can be used under the intervertebral foramen. It allows the doctor to more accurately observe the position of the fusion device.

Description

A reverse intervertebral intervertebral fusion device

technical field

The invention relates to the field of surgical instruments, in particular to an inversely insertable intervertebral foramen-endoscopic intervertebral fusion device.

Background technique

Degenerative lumbar diseases include intervertebral disc herniation, spinal stenosis, segmental instability, degenerative spondylolisthesis, and degenerative scoliosis, which are common diseases in middle-aged and elderly people. It has become a consensus that lumbar fusion is required for those with intervertebral instability while decompression and internal fixation are performed. The purpose of lumbar interbody fusion is to prevent the further development of instability and degeneration, and to reconstruct the stability of the spine through surgical methods to promote the recovery of the vertebral body. In the process of fusion, due to the differences between individual patients, the size of the fusion cages required is also different. Some patients need to insert two fusion cages. Currently, the tools on the market can only put the two fusion cages in step by step. When put in step by step, the first fuser will hinder the second fuser, and it is easy to change the position of the first fuser when putting in the second fuser, and it needs to be taken out and put in again, which is not easy to operate. convenient.

Contents of the invention

The invention provides an upside-down insertable intervertebral foramen endoscopic intervertebral fusion device, which solves the problem that the intervertebral disc fusion device in the prior art is inconvenient to put two fusion devices to the affected part of the intervertebral disc at the same time.

A reverse intervertebral intervertebral fusion device, comprising a handle, a connecting rod fixedly connected to the handle, a sleeve rod sleeved on the connecting rod, and a fixing rod connected to one end of the sleeve rod. A seat and a fusion device body, one end of the connecting rod protrudes from one side of the fixing seat, and the side of the fixing seat away from the sleeve rod is provided with two fixing rods for fixing the fusion device body;

The fuser body is a bullet-shaped structure, the inside of the fuser body is provided with a through hole, the upper and lower surfaces of the fuser body are provided with inverted teeth, and one side of the fuser body is also provided with a A fixing groove matched with the fixing rod, a threaded groove is provided at one end of the fusion device body close to the fixing seat, and a threaded rod matching with the threaded groove is fixedly connected to one end of the connecting rod, and the fusion device One side of the body is also provided with a half thread groove perpendicular to the end face.

Preferably, one end of the fixed rod close to the fixed seat is fixedly connected with a slider, one side of the fixed seat is provided with a chute matching with the slider, and the slider is slidably arranged on inside the chute.

Preferably, a fixed cover is slidably provided on the sleeve rod, an opening is provided at one end of the fixed cover, an insertion hole is opened on the fixed cover, and an insertion rod is movably connected in the insertion hole. A return spring is also arranged in the socket, a slide rail at one end is fixedly connected to the sleeve rod, and a relief slot for giving way to the slide rail is provided on the fixed cover.

Preferably, the outer diameter of the sleeve rod is 3.5mm.

Preferably, the length of the sleeve rod is 320mm.

Preferably, the fuser body is made of polyether ether ketone resin material.

Preferably, the fuser body is made of titanium alloy.

Compared with the prior art, the beneficial effect of the present invention is that the outer diameter of the sleeve rod of the present invention is smaller than the inner diameter of the working channel of the general intervertebral foramenoscope, and can be used under the intervertebral foramenoscope, allowing doctors to observe the fusion more accurately The location of the fusion device; according to the situation of different patients, one can be sent to the lumbar intervertebral area or two fusion devices can be sent to the lumbar intervertebral area at the same time, which is more convenient to operate. It is more convenient to insert, and effectively prevents the misplacement of the fusion device caused by gradual insertion.

Description of drawings

Fig. 1 is a structural representation I of the present invention;

Fig. 2 is a partial enlarged view of A place of Fig. 1 of the present invention;

Fig. 3 is the structural representation II of the present invention;

Fig. 4 is the sectional view at B-B place of Fig. 3 of the present invention;

Fig. 5 is a structural schematic diagram when a fusion device is installed in the present invention;

Fig. 6 is a diagram of the use state of the present invention.

Explanation of reference signs:

1-handle, 2-connecting rod, 3-sleeve rod, 4-fixing seat, 5-fusion fusion body, 6-fixing rod, 7-fixing cover, 8-through hole, 9-inverted tooth, 10-fixing groove, 11-thread groove, 12-thread rod, 13-half thread groove, 14-slider, 15-chute, 16-insert rod, 17-return spring, 18-slide rail, 19-give way groove.

Detailed ways

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

As shown in Fig. 1 to Fig. 6, a reverse intervertebral intervertebral fusion device provided by an embodiment of the present invention includes a handle 1, a connecting rod 2 fixedly connected to the handle 1, and a The sleeve rod 3 on the connecting rod 2, the fixing base 4 connected to one end of the sleeve rod 3 and the fuser body 5, one end of the connecting rod 2 protrudes from one side of the fixing base 4, the The side of the fixing base 4 away from the sleeve rod 3 is provided with two fixing rods 6 for fixing the fuser body 5;

The fusion device body 5 is a bullet-shaped structure, the interior of the fusion device body 5 is provided with a through hole 8, the upper and lower surfaces of the fusion device body 5 are provided with inverted teeth 9, and one part of the fusion device body 5 There is also a fixed groove 10 matching the fixed rod 6 on the side, a threaded groove 11 is provided at one end of the fusion device body 5 close to the fixed seat 4, and one end of the connecting rod 2 is fixedly connected with the A threaded rod 12 matched with the threaded groove 11, and a half threaded groove 13 perpendicular to the end surface is provided on one side of the fuser body 5;

The threaded rod 12 can not only be screwed into the threaded groove 11 of the fusion device body 5, but also can be screwed into the complete threaded groove formed by the half threaded grooves 13 of the two fusion device bodies 5; when only one fusion device body 5 is placed , the threaded rod 12 is screwed into the threaded groove 11 of the fusion device body 5, and when two fusion device bodies 5 are placed at the same time, the half-threaded grooves 13 of the two fusion device bodies 5 can form a complete threaded groove, and the two The fixing rod 6 can make the two cage bodies 5 fit closely, thereby ensuring the threaded connection relationship between the threaded rod 12 and the half threaded groove 13;

The fixing rod 6 snaps into the fixing groove 10 of the fusion device body 5, and when the threaded rod 12 is unscrewed, the fusion device body 5 can be prevented from rotating together with the threaded rod 12;

The slide block 14 at one end of the fixed rod 6 can only slide in the chute 15 and cannot fall off from the chute 15, and the slide block 14 is T-shaped;

When the distance between the two fixed rods 6 is adjusted to the maximum, two fusion device bodies 5 can just be put into it; 5 have different sizes, and the fuser bodies 5 of different sizes all have a matching under-scope tool;

One end of the fixed rod 6 close to the fixed base 4 is fixedly connected with a slider 14, and one side of the fixed base 4 is provided with a chute 15 matched with the slider 14, and the slider 14 can slide ground is arranged in the chute 15;

The sleeve rod 3 is slidably provided with a fixed cover 7, one end of the fixed cover 7 is provided with an opening, the fixed cover 7 is provided with a socket, and an insertion rod 16 is movably connected in the socket, so that A back-moving spring 17 is also arranged in the jack, and an end slide rail 18 is fixedly connected to the sleeve rod 3, and a step-off groove 19 for giving way to the slide rail 18 is provided on the fixed cover 7;

A part of the sleeve rod 3 can be located in the handle 1. There is a certain friction force between the handle 1 and the sleeve rod 3. When the handle is turned, the sleeve rod 3 will also be driven to rotate. When the cage body 5 is put into the lumbar intervertebral , directly turn the handle 1, in order to unscrew the threaded rod 12 from the threaded groove 11 and separate the cage body 5 from the fixing seat 4, the lumbar spine will bear a part of the axial force, which is easy to cause certain damage to the patient's lumbar spine, and the intervertebral When using the foramina, it is inconvenient to pinch the sleeve rod 3 by hand, and the intervertebral foramen mirror also needs to be held by hand. In order to make the operation more convenient, the fixed cover 7 can be used to connect the sleeve rod 3 and the intervertebral foramen. The tail ends of the mirrors are connected together, the fixed cover 7 can slide on the sleeve rod 3, and the rotation of the sleeve rod 3 can be restricted by fixing the fixed cover 7, and the fixed cover 7 can be sleeved on the tail end of the intervertebral foramen mirror. Press the two insertion rods 16 with the index finger, and the insertion rod 16 is in conflict with the outer wall of the end of the intervertebral foramen mirror, so that the fixed cover 7 is stuck on the intervertebral foramen mirror, so that the sleeve rod 3 is connected with the intervertebral foramen mirror, and also The insertion and extraction of the sleeve rod 3 are not affected.

The outer diameter of the sleeve rod 3 is 3.5mm.

The length of the sleeve rod 3 is 320mm.

Further, the fusion device body 5 is made of titanium alloy material. Medical titanium alloy has good biocompatibility and mechanical strength, is easy to process, and is low in cost. Polyether ether ketone resin material (PEEK) is more durable than titanium alloy. Expensive, the main problem is still limited by materials and processing methods, the cost of polyetheretherketone resin fusion device is 2-5 times the cost of titanium alloy material.

Working principle: When in use, insert the end of the sleeve rod 3 close to the handle 1 from the end of the intervertebral foramenoscope into the affected part into the working channel of the intervertebral foramenoscope, and then insert the connecting rod 2 from the other end of the working channel of the intervertebral foramenoscope Insert and insert into the sleeve rod 3, move the fixed rod 6 to a suitable position, then insert the fusion device body 5 between the two fixed rods 6, hold the fusion device body 5 with one hand, and turn the handle 1 with the other hand, The threaded rod 12 is threaded into the threaded groove 11 or the two half-threaded grooves 13, and finally the fixed cover 7 is set on the tail end of the intervertebral foramen mirror, and then the intervertebral foramen mirror is inserted into the affected area, and the fusion cage is inserted into the lumbar spine Intervertebral, when it is necessary to disconnect the connection between the fusion device body 5 and the connecting rod 2 and put it into the fusion device body 5, press the two insertion rods 16 with your hands, and then turn the handle 1 with the other hand, and the handle 1 carries The connecting rod 2 rotates with the threaded rod 12. The threaded rod 12 is unscrewed from the threaded groove 11 or the two half-threaded grooves 13, and then pushes the handle 1 inward. The handle 1 connects the fuser body 5 and the The fixing rod 6 is separated, and the insertion of the fusion device body 5 is completed.

The above disclosures are only a few specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (4)

1. The intervertebral fusion device under the inverse insertion type intervertebral foramen mirror is characterized by comprising a handle, a connecting rod fixedly connected with the handle, a loop bar sleeved on the connecting rod, a fixing seat connected with one end of the loop bar and a fusion device body, wherein one end of the connecting rod extends out from one side of the fixing seat, and two fixing rods for fixing the fusion device body are arranged on one side of the fixing seat away from the loop bar;

the fusion device comprises a fusion device body, a fixing rod, a threaded groove, a threaded rod and a half-threaded groove, wherein the fusion device body is of a bullet type structure, through holes are formed in the fusion device body, inverted teeth are arranged on the upper surface and the lower surface of the fusion device body, a fixing groove matched with the fixing rod is further formed in one side of the fusion device body, the threaded groove is formed in one end, close to the fixing seat, of the fusion device body, the threaded rod matched with the threaded groove is fixedly connected to one end of the connecting rod, and the half-threaded groove perpendicular to the end face is further formed in one side of the fusion device body;

one end of the fixed rod, which is close to the fixed seat, is fixedly connected with a sliding block, one side of the fixed seat is provided with a sliding groove matched with the sliding block, and the sliding block is slidably arranged in the sliding groove;

the fixed cover is provided with an opening at one end, a jack is formed in the fixed cover, an inserting rod is movably connected in the jack, a reset spring is further arranged in the jack, one end sliding rail is fixedly connected on the loop bar, and a yielding groove for yielding the sliding rail is formed in the fixed cover;

the fusion device body is made of polyether-ether-ketone resin material.

2. An inverse insertable foraminal inferior interbody fusion cage as claimed in claim 1 wherein said loop bar has an outer diameter of 3.5mm.

3. An inverse insertable foraminal inferior interbody fusion cage as claimed in claim 2 wherein the length of the sleeve is 320mm.

4. The invertible foramen sub-vertebral fusion cage of claim 1, wherein the cage body is a titanium alloy material.

Images