CN110693631A - A reversible intervertebral fusion cage under endoscopic foramen - Google Patents

Abstract

The invention discloses a reversible intervertebral foramen endoscopic intervertebral fusion cage, which belongs to the field of surgical instruments and comprises a handle, a connecting rod, a sleeve rod and a cage body. A fixing seat is provided on the side away from the sleeve rod. two fixing rods for fixing the fusion body; the fusion body is a bullet-shaped structure, the upper and lower surfaces of the fusion body are provided with inverted teeth, the two sides of the end of the fusion body are also provided with fixing grooves, and the center of the end of the fusion body is opened There is a threaded groove, 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 to the cage. After the hollow part of the connecting rod is connected to the cage body, it can be inserted into the spinal endoscopic instrument channel. , the solid part of the connecting rod with the handle is sleeved from the hollow part of the connecting rod to the end of the cage 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 foramen microscope, It allows doctors to more accurately observe where the cage is placed.

Description

A reversible intervertebral fusion cage under endoscopic foramen

technical field

The invention relates to the field of surgical instruments, in particular to a reversible intervertebral foramen intervertebral fusion cage.

Background technique

Degenerative lumbar spine diseases, including disc herniation, spinal stenosis, segmental instability, degenerative spondylolisthesis, and degenerative scoliosis, are common diseases among middle-aged and elderly people. It has become a consensus that lumbar interbody fusion is required for intervertebral instability while decompression and internal fixation. The purpose of lumbar interbody fusion is to prevent the further development of unstable degeneration, and to perform stability reconstruction through surgical methods to promote vertebral fusion. In the process of fusion between patients, due to the differences between individual patients, the required size and size of the cages are also different. Some patients need to insert two cages. At present, the tools on the market can only gradually put two cages in, When gradually put in, the first cage will hinder the second cage, and it is easy to change the position of the first cage when the second cage is placed. convenient.

SUMMARY OF THE INVENTION

The present invention provides a reversible intervertebral foramen endoscopic intervertebral fusion cage, which can solve the problem of inconveniently placing two cages on the affected part of the intervertebral disc simultaneously with the intervertebral disc cage tools in the prior art.

A reversible intervertebral foramen intervertebral fusion cage, comprising a handle, a connecting rod fixedly connected with the handle, a sleeve rod sleeved on the connecting rod, and a fixed sleeve connected to one end of the sleeve rod a seat and a cage 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 and fixing the cage body;

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

Preferably, a sliding block is fixedly connected to one end of the fixing rod close to the fixing seat, a sliding groove is provided on one side of the fixing seat, and the sliding block is slidably arranged on the sliding block. in the chute.

Preferably, a fixing cover is slidably provided on the sleeve rod, one end of the fixing cover is provided with an opening, an insertion hole is opened on the fixing cover, and an insertion rod is movably connected in the insertion hole, and the insertion rod is movably connected to the insertion hole. A return spring is also arranged in the jack, one end of a sliding rail is fixedly connected to the sleeve rod, and a vacating slot for vacating the sliding rail is opened on the fixing cover.

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

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

Preferably, the cage body is made of polyetheretherketone resin material.

Preferably, the cage body is made of titanium alloy material.

Compared with the prior art, the beneficial effects of the present invention are: the outer diameter of the sleeve rod of the present invention is smaller than the inner diameter of the working channel of a general foraminal mirror, and can be used under a foraminal mirror, enabling doctors to observe the fusion more accurately. position of the cage; one can be sent to the lumbar intervertebral space or two cages can be sent to the lumbar intervertebral space at the same time according to the situation of different patients, which is more convenient to operate. It is more convenient to insert, and it can effectively prevent the occurrence of the dislocation of the cage caused by the gradual insertion.

Description of drawings

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

Fig. 2 is the 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 of the B-B place of Fig. 3 of the present invention;

Fig. 5 is the structural representation when the present invention installs a fusion device;

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

Description of reference numbers:

1-Handle, 2-Connecting rod, 3-Sleeve rod, 4-Fixing seat, 5-Cage body, 6-Fixing rod, 7-Fixing cover, 8-Through hole, 9-Inverted tooth, 10-Fixing groove, 11-Threaded groove, 12-Threaded rod, 13-Half-threaded groove, 14-Slide block, 15-Slide groove, 16-Insertion 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 with reference to 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 FIGS. 1 to 6 , a reversible intervertebral foraminal fusion cage provided by an embodiment of the present invention includes a handle 1, a connecting rod 2 fixedly connected to the handle 1, and sleeved on the handle 1. The sleeve rod 3 on the connecting rod 2, the fixing seat 4 connected to one end of the sleeve rod 3, and the cage body 5, one end of the connecting rod 2 protrudes from one side of the fixing seat 4, and the The side of the fixing base 4 away from the sleeve rod 3 is provided with two fixing rods 6 for fixing and fixing the cage body 5;

The cage body 5 is a bullet-shaped structure, the interior of the cage body 5 is provided with a through hole 8, the upper and lower surfaces of the cage body 5 are provided with inverted teeth 9, and one of the cage body 5 is provided with inverted teeth 9. The side is also provided with a fixing groove 10 matching the fixing rod 6, the end of the cage body 5 close to the fixing seat 4 is provided with a threaded groove 11, and one end of the connecting rod 2 is fixedly connected with the The threaded rod 12 matched with the threaded groove 11, a half-threaded groove 13 perpendicular to the end face is also opened on one side of the cage body 5;

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

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

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

When the distance between the two fixing rods 6 is adjusted to the maximum, two cage bodies 5 can be placed. When the distance between the two fixing rods 6 is adjusted to the minimum, one cage body 5 can be placed. 5. There are different sizes, and the cage bodies 5 of different sizes have a matching tool under the microscope;

A sliding block 14 is fixedly connected to one end of the fixing rod 6 close to the fixing seat 4 , and a sliding groove 15 is provided on one side of the fixing seat 4 to cooperate with the sliding block 14 , and the sliding block 14 can slide 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 an insertion hole, and the insertion rod 16 is movably connected in the insertion hole, so A return spring 17 is also arranged in the socket, a slide rail 18 at one end is fixedly connected to the sleeve rod 3 , and a relinquishment slot 19 for giving way to the slide rail 18 is opened on the fixed cover 7 ;

A part of the sleeve rod 3 can be located in the handle 1. There is a certain friction between the handle 1 and the sleeve rod 3. When the handle is rotated, the sleeve rod 3 will also be driven to rotate. , directly rotate the handle 1, in order to unscrew the threaded rod 12 from the threaded groove 11 and separate the cage body 5 from the fixed seat 4, the lumbar vertebrae will bear part of the axial force, which is easy to cause certain damage to the patient's lumbar vertebrae. When used under the foramen scope, it is inconvenient to hold the sleeve rod 3 by hand, and the intervertebral foramen scope also needs to be supported by hand. The rear end of the mirror is 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 rear end of the intervertebral foramen mirror. Press the two insertion rods 16 with the index finger, and the insertion rod 16 is against the outer wall of the end of the intervertebral foramen mirror, that is, the fixed cover 7 is clamped 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 is not affected.

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

The length of the sleeve rod 3 is 320mm.

Further, the cage body 5 is made of titanium alloy material. Medical titanium alloy has good biocompatibility and mechanical strength, easy processing and low cost. Compared with titanium alloy, polyetheretherketone resin material (PEEK) is more efficient. Expensive, the main problem is still limited by materials and processing methods. The cost of the fusion device made of polyetheretherketone resin is 2-5 times that of titanium alloy.

Working principle: When in use, insert the end of the sleeve rod 3 close to the handle 1 into the working channel of the foraminal mirror from the end of the intervertebral foramenoscope into the affected part, and then insert the connecting rod 2 from the other end of the foraminal mirror working channel. Insert and insert into the sleeve rod 3, move the fixed rod 6 to a suitable position, then insert the cage body 5 between the two fixed rods 6, hold the cage body 5 with one hand, and turn the handle 1 with the other hand, The threaded rod 12 is then screwed into the threaded groove 11 or the two half-threaded grooves 13. Finally, the fixing cover 7 is put on the rear end of the foraminal scope, and then the foraminal scope is inserted into the affected area, and the cage is inserted into the lumbar vertebra. Intervertebral, when it is necessary to disconnect the connection between the cage body 5 and the connecting rod 2, that is, put the cage body 5, press the two insertion rods 16 with one hand, and then turn the handle 1 with the other hand, and the handle 1 carries When the connecting rod 2 rotates, it 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 fixing rod 6 is separated, and the insertion of the cage 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 that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims (7)

1. a reversible intervertebral foramina intervertebral fusion cage is characterized in that, comprises handle, the connecting rod that is fixedly connected with the handle, the sleeve rod that is sleeved on the connecting rod, is connected to the The fixed seat and the cage body at one end of the sleeve rod, one end of the connecting rod protrudes from one side of the fixed seat, and the side of the fixed seat away from the sleeve rod is provided with a fixed and fixed cage body. the two fixed rods; The fusion device body is a bullet-shaped structure, the inside of the fusion device body is provided with through holes, the upper and lower surfaces of the fusion device body are provided with inverted teeth, and one side of the fusion device body is also provided. The fixing groove is matched with the fixing rod, one end of the cage body close to the fixing seat is provided with a threaded groove, and one end of the connecting rod is fixedly connected with a threaded rod matched with the threaded groove. One side of the main body is also provided with a half-threaded groove perpendicular to the end face. 2. The reversible intervertebral foraminal intervertebral fusion cage according to claim 1, wherein one end of the fixing rod close to the fixing seat is fixedly connected with a slider, and the fixing seat is A sliding slot matched with the sliding block is opened on one side of the sliding block, and the sliding block is slidably arranged in the sliding slot. 3. The reversible intervertebral foramen intervertebral fusion cage according to claim 2, wherein a fixed cover is slidably provided on the sleeve rod, and one end of the fixed cover is provided with a an opening, an insertion hole is opened on the fixed cover, a plug-in rod is movably connected in the insertion hole, a return spring is also arranged in the insertion hole, a slide rail at one end is fixedly connected to the sleeve rod, and the fixed cover The upper part is provided with a leaving slot for making way for the sliding rail. 4 . The reversible intervertebral fusion cage of claim 3 , wherein the outer diameter of the sleeve rod is 3.5 mm. 5 . 5 . The reversible intervertebral fusion cage of claim 4 , wherein the length of the sleeve rod is 320 mm. 6 . 6 . The reversible intervertebral fusion cage under transforaminal scope according to claim 1 , wherein the cage body is made of polyetheretherketone resin material. 7 . 7 . The reversible intervertebral fusion cage of claim 1 , wherein the cage body is made of titanium alloy material. 8 .

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