A snap-on plate internal fixation device for minimally invasive spinal surgery

Abstract

The present invention relates to a snap - type steel plate internal fixation device for minimally invasive spinal surgery, which includes a machine head connection seat. An XY two - way adjustment mechanism and an X - direction adjustment mechanism are respectively arranged on the machine head connection seat. A main eccentric steel plate clamping device is arranged on the XY two - way adjustment mechanism, and a secondary eccentric steel plate clamping device is arranged on the X - direction adjustment mechanism. The main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed. A main steel plate is arranged on the main eccentric steel plate clamping device, and a secondary steel plate is arranged on the secondary eccentric steel plate clamping device. A snap - fit structure is distributed between the main steel plate and the secondary steel plate. Thus, two - way adjustment in the X and Y directions can be achieved, enabling the main and secondary steel plates with barbs to fit more closely to the bone. The two steel plate clamps are of eccentric structure, which is beneficial for delivering the steel plate along the subcutaneous tunnel to the ideal position. The spinous process ligament complex can be moved above the steel plate buckle, raising the spinous process ligament complex by a certain height, and the steel plate barbs are inserted into the spinous process bone mass to achieve stable positioning.

Description

Technical Field

[0001] The present invention relates to an internal fixation device for steel plates, and particularly to a snap - type internal fixation device for steel plates used in minimally invasive spinal surgery. Background Art

[0002] In recent years, some major progress has been made in the field of spinal surgery. The surgical treatment method for lumbar disc herniation will undergo revolutionary changes: the mode of mainly "removing" the herniated intervertebral disc will enter a mode of mainly "preserving" the herniated intervertebral disc to allow it to absorb naturally. Literature reports that the artificial spinal double - opening expansionplasty (CMEL) can widely "induce" the natural absorption (RHNP) of the herniated intervertebral disc, with an absorption ratio of up to 81.3% and a maximum absorption rate of up to 100%. However, the artificial method has problems such as a large incision and cumbersome surgical operations, especially the installation of steel plates, which affects the popularization and application of this new technology. At present, although some spinal surgical robots have been successfully applied clinically, including the Mazor spinal assistant robot in Israel, the SPINEBOT spinal robot in South Korea, the Mazor X spinal surgical robot in the United States, and the Tianji spinal surgical robot in China, etc., they basically use the method of registering intraoperative X - ray images with preoperative CT images for positioning and can only be used for the implantation of pedicle screws, with very single functions.

[0003] To "induce" the widespread natural absorption (RHNP) of the herniated intervertebral disc, for a minimally invasive spinal surgical robot, it is necessary to complete the CMEL procedure, achieve double - opening decompression of the spinal canal and posterior displacement and expansion within a small skin incision and a narrow space, namely the subcutaneous tunnel. However, there is currently no internal fixation steel plate system that can cooperate with a minimally invasive spinal surgical robot to achieve the upward movement of the spinous ligament complex and be installed through the subcutaneous tunnel.

[0004] In view of the above - mentioned defects, the inventor actively conducts research and innovation in order to create a snap - type internal fixation device for steel plates used in minimally invasive spinal surgery, making it more valuable in industrial utilization. Summary of the Invention

[0005] To solve the above - mentioned technical problems, the purpose of the present invention is to provide a snap - type internal fixation device for steel plates used in minimally invasive spinal surgery.

[0006] A snap - type steel plate internal fixation device for minimally invasive spinal surgery of the present invention includes a machine head connecting seat, wherein: an XY two - way adjustment mechanism and an X - direction adjustment mechanism are respectively arranged on the machine head connecting seat; a main eccentric steel plate clamping device is arranged on the XY two - way adjustment mechanism; a secondary eccentric steel plate clamping device is arranged on the X - direction adjustment mechanism; the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed; the XY two - way adjustment mechanism is a U - shaped block; side horizontal grooves are mirror - symmetrically distributed on both sides of the machine head connecting seat; the two extending ends of the U - shaped block are inserted into the side horizontal grooves; a top horizontal groove is opened at the upper end of the machine head connecting seat; Y - direction adjustment screws are arranged in the top horizontal grooves, and the Y - direction adjustment screws are connected to the top of the U - shaped block; an X - direction adjustment screw is connected to the U - shaped block, a main adjustment nut is arranged on the X - direction adjustment screw, and the main adjustment nut is connected to the upper end of the main eccentric steel plate clamp; a main steel plate is arranged on the main eccentric steel plate clamping device; a secondary steel plate is arranged on the secondary eccentric steel plate clamping device; a snap - fit structure is distributed between the main steel plate and the secondary steel plate.

[0007] Further, in the above - mentioned snap - type steel plate internal fixation device for minimally invasive spinal surgery, the X - direction adjustment mechanism includes a guiding seat arranged outside the machine head connecting seat; paired guiding rods are arranged on the guiding seat; an X - direction adjustment screw is arranged on one side of the guiding seat; the guiding rods are connected to the secondary eccentric steel plate clamping device; a secondary adjustment nut is arranged at the upper end of the secondary eccentric steel plate clamping device; one side of the secondary eccentric steel plate clamping device is in contact with the X - direction adjustment screw.

[0008] Furthermore, in the above - mentioned snap - type steel plate internal fixation device for minimally invasive spinal surgery, both the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device include a lower L - shaped rod, the lower L - shaped rod is connected to an upper L - shaped rod through a fastening screw; a guiding perforation is arranged at the upper end of the lower L - shaped rod; a convex platform is arranged at the lower end of the lower L - shaped rod; a corresponding main steel plate or secondary steel plate is connected to the convex platform; fixing holes are arranged on the main steel plate and the secondary steel plate; the convex platform is embedded in the fixing hole.

[0009] Furthermore, in the above - mentioned snap - type steel plate internal fixation device for minimally invasive spinal surgery, the outer shapes of the main steel plate and the secondary steel plate are in an arc - shaped structure; a number of barbs are distributed on the inner sides of the main steel plate and the secondary steel plate; positioning holes are arranged on the main steel plate and the secondary steel plate; positioning screws are arranged in the positioning holes.

[0010] Furthermore, in the above - mentioned snap - type steel plate internal fixation device for minimally invasive spinal surgery, the snap - fit structure includes a convex structure extending inwards from the main steel plate and a snap - fit rod extending inwards from the secondary steel plate; when the main steel plate and the secondary steel plate are combined, the convex structure is inserted into the snap - fit rod.

[0011] Furthermore, in the above-mentioned snap-fastening steel plate internal fixation device for minimally invasive spinal surgery, a shrapnel is arranged inside the snap-fastening rod.

[0012] Still further, in the above-mentioned snap-fastening steel plate internal fixation device for minimally invasive spinal surgery, one side of the machine head connecting seat is connected with a machine head fixing seat through a connecting bolt.

[0013] With the above solutions, the present invention has at least the following advantages:

[0014] 1. Through the cooperation of multiple adjusting structures, two-way adjustment in the X and Y directions can be achieved, making the barbed steel plate more conformable to the bone.

[0015] 2. The two steel plate clamps are of an eccentric structure, which is beneficial to delivering the steel plate along the subcutaneous tunnel to the ideal position.

[0016] 3. The spinous process ligament complex can be moved above the steel plate buckle, raising the spinous process ligament complex by a certain height, and the main and secondary steel plates' barbs are inserted into the spinous process bone mass to achieve stable fixation.

[0017] 4. Through the snap-fastening structure, appropriate blocking can be achieved, preventing the spinous process ligament complex from shifting into the spinal canal and ensuring safe use.

[0018] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the use of the snap-fastening steel plate internal fixation device for minimally invasive spinal surgery of the present invention.

[0020] Figure 2 is a schematic top view structure diagram of the snap-fastening steel plate internal fixation device for minimally invasive spinal surgery of the present invention.

[0021] Figure 3 is a schematic side view of the use of the snap-fastening steel plate internal fixation device for minimally invasive spinal surgery of the present invention.

[0022] Figure 4 is a schematic structural diagram of the secondary eccentric steel plate clamp device.

[0023] The meanings of the reference numerals in the drawings are as follows.

[0024] 1 Machine head connecting seat 2 Main eccentric steel plate clamp device

[0025] 3 Secondary eccentric steel plate clamp device 4 U-shaped block

[0026] 5 Side horizontal groove 6 Top horizontal groove

[0027] 7 Y-direction adjustment screw, 8 X-direction adjustment screw

[0028] 9 Main adjustment nut, 10 Main steel plate

[0029] 11 Guide seat, 12 Guide rod

[0030] 13 X-direction adjustment screw, 14 Sub-adjustment nut

[0031] 15 Lower L-shaped rod, 16 Fastening screw

[0032] 17 Upper L-shaped rod, 18 Boss

[0033] 19 Burr, 20 Positioning screw

[0034] 21 Protrusion structure, 22 Buckling rod

[0035] 23 Connecting bolt, 24 Machine head fixing seat

[0036] 25 Guide perforation, 26 Sub-steel plate

[0037] 27 Spinous process ligament complex Detailed implementation manners

[0038] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0039] As Figures 1 to 4 A snap-on steel plate internal fixation device for minimally invasive spinal surgery, including a machine head connection seat 1, which is different in that: an XY two-way adjustment mechanism and an X-direction adjustment mechanism are respectively provided on the machine head connection seat 1, so that precise adjustment in the X and Y directions can be achieved under the control of a surgical robot. At the same time, in order to realize the limitation of the bone, a main eccentric steel plate clamping device 2 is provided on the XY two-way adjustment mechanism, and a sub-eccentric steel plate clamping device 3 is provided on the X-direction adjustment mechanism. Moreover, in order to fit the outer contour curve of the human vertebra and realize the clamping and positioning of the two steel plates, the main eccentric steel plate clamping device 2 and the sub-eccentric steel plate clamping device 3 are symmetrically distributed.

[0040] In view of the actual implementation, in order to facilitate the realization of precise two-way adjustment, the XY two-way adjustment mechanism is the U-shaped block 4. Specifically, on both sides of the machine head connecting seat 1 adopted in the present invention, there are side horizontal grooves 5 distributed mirror-symmetrically. The two extending ends of the U-shaped block 4 are inserted into the side horizontal grooves 5, which can realize effective movement adjustment while meeting the limit. At the same time, a top horizontal groove 6 is opened at the upper end of the machine head connecting seat 1, and Y-direction adjustment screws 7 are arranged in the top horizontal groove 6. The Y-direction adjustment screws 7 are connected to the top of the U-shaped block 4. In this way, the locking of the Y-direction movement can be realized, and the free adjustment and positioning of the used device can be satisfied. Moreover, the present invention also connects an X-direction adjustment screw 13 to the U-shaped block 4, and a main adjustment nut 9 is arranged on the X-direction adjustment screw 13. The main adjustment nut 9 is connected to the upper end of the main eccentric steel plate clamp. At the same time, in order to meet the subsequent snap-fit connection and positioning, a main steel plate 10 is arranged on the main eccentric steel plate clamp device 2, a secondary steel plate 26 is arranged on the secondary eccentric steel plate clamp device 3, and a snap-fit structure is distributed between the main steel plate 10 and the secondary steel plate 26.

[0041] In view of a preferred embodiment of the present invention, the X-direction adjustment mechanism includes a guiding seat 11 arranged outside the machine head connecting seat 1. A pair of guiding rods 12 are arranged on the guiding seat 11, so that the X-direction movement can be guided. Considering the need for adjustment and limit, an X-direction adjustment screw 13 is arranged on one side of the guiding seat. Specifically, the guiding rod 12 is connected to the secondary eccentric steel plate clamp device 3, and a secondary adjustment nut 14 is arranged at the upper end of the secondary eccentric steel plate clamp device 3 for easy adjustment. At the same time, considering the convenience of limit adjustment, one side of the secondary eccentric steel plate clamp device 3 is in contact with the X-direction adjustment screw 13.

[0042] Furthermore, both the main eccentric steel plate clamp device 2 and the secondary eccentric steel plate clamp device 3 include a lower L-shaped rod 15, and the lower L-shaped rod 15 is connected to an upper L-shaped rod 17 through a fastening screw 16. At the same time, a guiding through hole 25 is arranged at the upper end of the lower L-shaped rod 15. In this way, when assembling, the guiding rod 12 is connected into the guiding through hole 25. And, a boss 18 is arranged at the lower end of the lower L-shaped rod 15, and a corresponding main steel plate 10 or secondary steel plate 26 is connected to the boss 18. Considering the temporary positioning of the steel plate, fixing holes are arranged on the main steel plate 10 and the secondary steel plate 26, and the boss 18 is embedded in the fixing holes. After the assembly is completed, the fastening screw 16 can squeeze the upper L-shaped rod 17 and the lower L-shaped rod 15 tightly. Through the distribution of the paired main eccentric steel plate clamp devices 2 and the secondary eccentric steel plates clamps, the main steel plate 10 and the secondary steel plate 26 can be sent to the ideal position along the subcutaneous tunnel together.

[0043] In actual implementation, the main steel plate 10 and the auxiliary steel plate 26 adopted in the present invention are in a curved arc shape. At the same time, a number of barbs 19 are distributed on the inner sides of the main steel plate 10 and the auxiliary steel plate 26. And, positioning holes are provided on the main steel plate 10 and the auxiliary steel plate 26, and positioning screws 20 are arranged in the positioning holes. In order to have better binding tightness, the buckling structure adopted includes a convex structure 21 extending inward from the main steel plate 10 and a buckling rod 22 extending inward from the auxiliary steel plate 26. In this way, when the main steel plate 10 and the auxiliary steel plate 26 are combined, the convex structure 21 is inserted into the buckling rod 22. At the same time, in order to prevent accidental loosening, an elastic sheet can be arranged in the buckling rod 22. Thus, the elastic sheet can be used to clamp the convex structure 21 to form a stable buckle to prevent the main steel plate 10 and the auxiliary steel plate 26 from coming apart.

[0044] During actual use, after the spinous ligament complex 27 moves up a certain height above the buckling rod 22, the main steel plate 10 and the auxiliary steel plate 26 move relatively along the Y direction respectively. Then, the main steel plate 10 and the auxiliary steel plate 26 are buckled with each other, so that a plurality of barbs 19 simultaneously penetrate into the spinous bone mass to ensure firm fixation of the steel plate.

[0045] Looking further, considering more convenient connection with the surgical robot, convenient replacement and maintenance can be achieved, and it is also convenient to wear a sterile isolation protective cover. One side of the machine head connecting seat 1 is connected with a machine head fixing seat 24 through a connecting bolt 23. Of course, for different structures or implementation methods, screws, connecting rods, magnetic attraction and other methods can also be adopted. Any structure that can realize the combination of the machine head connecting seat 1 and the machine head fixing seat 24 can be adopted, which will not be elaborated here. At the same time, in some extreme cases, the machine head connecting seat 1 can be directly docked and connected with the adaptive decompression tunnel robot.

[0046] In actual implementation, the spinous ligament complex 27 is manually moved up a certain height, and then the buckling rod 22 of the auxiliary steel plate 26 is extended below the spinous ligament complex 27. At the same time, the main steel plate 10 and the auxiliary steel plate 26 move relatively along the Y direction respectively. Then, the main steel plate 10 and the auxiliary steel plate 26 are buckled with each other. And, a plurality of barbs 19 simultaneously penetrate into the spinous bone mass. Finally, the main steel plate 10, the auxiliary steel plate 26 and the spinous ligament complex 27 can be fixed through the positioning screws 20.

[0047] It can be seen from the above text description and in combination with the drawings that after adopting the present invention, the following advantages are obtained:

[0048] 1. Through the cooperation of multiple adjustment structures, two-way adjustment in the X and Y directions can be realized, so that the barbed steel plate can fit better on the bone.

[0049] 2. The two steel plate clamps are of an eccentric structure, which is beneficial to delivering the steel plate along the subcutaneous tunnel to the ideal position.

[0050] 3. It is capable of moving the spinous process ligament complex above the steel plate buckle, raising the spinous process ligament complex by a certain height, and realizing stable fixation by inserting the barbs of the main and auxiliary steel plates into the spinous process bone mass.

[0051] 4. Through the buckling structure, appropriate blocking can be achieved, which can prevent the spinous process ligament complex from shifting into the spinal canal and ensure the safety of use.

[0052] 5. The overall structure is simple and can be used in cooperation with various conventional minimally invasive spinal surgery robots.

[0053] In addition, the orientation or positional relationship described in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific orientation, or be operated in a specific orientation structure. Therefore, it should not be construed as a limitation to the present invention.

[0054] The terms "main" and "auxiliary" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "main" and "auxiliary" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0055] Similarly, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms such as "connection" and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. And it can be directly on another component or indirectly on that another component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0057] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0058] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A snap - on plate internal fixation device for minimally invasive spinal surgery, including a machine head connecting seat, characterized in that: An XY two-way adjustment mechanism and an X-direction adjustment mechanism are respectively arranged on the head connecting seat. A main eccentric steel plate clamping device is arranged on the XY two-way adjustment mechanism, and a secondary eccentric steel plate clamping device is arranged on the X-direction adjustment mechanism. The main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed. The XY two-way adjustment mechanism is a U-shaped block. Side horizontal grooves are mirror-symmetrically distributed on both sides of the head connecting seat. The two extending ends of the U-shaped block are inserted into the side horizontal grooves. A top horizontal groove is opened at the upper end of the head connecting seat. Y-direction adjustment screws are arranged in the top horizontal groove. The Y-direction adjustment screws are connected to the top of the U-shaped block. An X-direction adjustment screw is connected to the U-shaped block. A main adjustment nut is arranged on the X-direction adjustment screw. The main adjustment nut is connected to the upper end of the main eccentric steel plate clamp. A main steel plate is arranged on the main eccentric steel plate clamping device, and a secondary steel plate is arranged on the secondary eccentric steel plate clamping device. A fastening structure is distributed between the main steel plate and the secondary steel plate; The X-direction adjustment mechanism includes a guiding seat arranged outside the head connecting seat. A pair of distributed guiding rods are arranged on the guiding seat. An X-direction adjustment screw is arranged on one side of the guiding seat. The guiding rods are connected to the secondary eccentric steel plate clamping device. A secondary adjustment nut is arranged at the upper end of the secondary eccentric steel plate clamping device. One side of the secondary eccentric steel plate clamping device is in contact with the X-direction adjustment screw.

2. The snap - on plate internal fixation device for minimally invasive spinal surgery according to claim 1, characterized in that: Both the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device include a lower L-shaped rod. The lower L-shaped rod is connected to an upper L-shaped rod through a fastening screw. A guiding through hole is arranged at the upper end of the lower L-shaped rod. A convex platform is arranged at the lower end of the lower L-shaped rod. A corresponding main steel plate or secondary steel plate is connected to the convex platform. Fixing holes are arranged on the main steel plate and the secondary steel plate. The convex platform is embedded in the fixing hole.

3. The snap - on plate internal fixation device for minimally invasive spinal surgery according to claim 1, characterized in that: The outer shapes of the main steel plate and the secondary steel plate are in an arc structure. A number of convex thorns are distributed on the inner sides of the main steel plate and the secondary steel plate. Positioning holes are arranged on the main steel plate and the secondary steel plate. Positioning screws are arranged in the positioning holes.

4. The snap - on plate internal fixation device for minimally invasive spinal surgery according to claim 1, characterized in that: The fastening structure includes a convex structure extending inward from the main steel plate and a fastening rod extending inward from the secondary steel plate. When the main steel plate and the secondary steel plate are combined, the convex structure is inserted into the fastening rod.

5. The snap - on plate internal fixation device for minimally invasive spinal surgery according to claim 4, characterized in that: A spring piece is arranged in the fastening rod.

6. The snap - on plate internal fixation device for minimally invasive spinal surgery according to claim 1, characterized in that: One side of the head connecting seat is connected to a head fixing seat through a connecting bolt.

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