Sliding arcuate intervertebral disc cutter

Abstract

The utility model discloses a sliding arc intervertebral disc cutter, including handle, arc track, cutting device and connecting track, handle fixed mounting in one end of arc track, arc track is equipped with sliding block and connecting device, arc track is connected with connecting track through connecting device, sliding block with arc track sliding connection, cutting device includes bone cutter and knife handle, the lower extreme of knife handle with bone cutter fixed connection, and the upper extreme with sliding block fixed connection, and connecting track is equipped with connecting sliding block, and connecting sliding block is connected with connecting track, and is provided with the clamping groove that is matched with the knife tip of bone cutter. The utility model discloses a protection of arc track and connecting track along the vertebrae one round can guarantee the safety of surrounding blood vessels nerve well, still can position the intervertebral disc of needing cutting, and bone cutter is driven along the track and does arc cutting through sliding block, avoids the bone cutter cutting to the vertebrae and cartilage endplate while cutting the intervertebral disc fast.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sliding arc-shaped intervertebral disc cutter. Background Technology

[0002] Total vertebrectomy is a surgical technique that completely removes tumors of the vertebral body and its surrounding structures. The main goals of the surgery are to remove the tumor, relieve nerve compression, and restore spinal stability. Currently, in total vertebrectomy for spinal tumors, disc removal is routinely performed using a bone scalpel or a wire saw. On the one hand, using a bone scalpel to remove the disc can cause significant vibration to the spinal cord, and when fixing the disc, the bone scalpel typically cuts from top to bottom, sometimes damaging the endplate or vertebral body. Furthermore, wire saws are difficult to insert and fix, and may also cut the endplate or vertebral body. Conventional electrocautery uses high-frequency current to heat tissue for cutting, resulting in a straight line that can easily damage the dural sac, nerve roots, and major blood vessels anterior to the vertebral body. This design, with its sliding track protecting the vertebral body, effectively ensures the safety of surrounding blood vessels and nerves, avoids cutting into the vertebral body and cartilaginous endplate, and minimizes excessive vibration to the spinal cord. Utility Model Content

[0003] The purpose of this invention is to provide a sliding arc-shaped intervertebral disc cutter that is simple to insert and position, convenient for cutting intervertebral discs, and effectively protects surrounding blood vessels and nerves, in order to solve the technical problem of easily damaging the dura mater and surrounding nerves and blood vessels when cutting intervertebral discs during total vertebrectomy for spinal tumors.

[0004] To solve the above technical problems, the solution adopted by this utility model is as follows:

[0005] A sliding arc-shaped intervertebral disc cutter includes a handle, an arc-shaped track, a cutting device, and a connecting track. The handle is fixedly installed at one end of the arc-shaped track. The arc-shaped track matches the curvature of the vertebral body and is equipped with a slider and a connecting device. The arc-shaped track is connected to the connecting track via the connecting device. The slider is slidably connected to the arc-shaped track. The cutting device includes a bone blade and a handle. The lower end of the handle is fixedly connected to the bone blade, and the upper end is fixedly connected to the slider. The bone blade passes through the underside of the dural sac and is connected to the slider via the handle. The slider is connected to the connecting track. As the slider moves along the arc-shaped track and the connecting track, the bone scalpel also moves accordingly to cut the intervertebral disc. The slider is an electric guide rail slider, powered wirelessly, such as by electromagnetic induction. The connecting track is equipped with a connecting slider. The connecting slider is slidably connected to the connecting track and has a first slot that matches the tip of the bone scalpel. After the bone scalpel passes under the dura mater, it is engaged in the first slot of the connecting slider to prevent the bone scalpel from shaking and cutting other bones when it moves downwards to cut the intervertebral disc via the slider.

[0006] Furthermore, the connecting device includes a threaded post and a second slot; the second slot matches the threaded post; the threaded post is fixedly installed at one end of the connecting track; the second slot is fixedly installed at the other end of the arc-shaped track. After the arc-shaped track is driven around the vertebral body once by the handle, the arc-shaped track and the connecting track are connected together by the threaded post and the second slot, which facilitates the slider to slide in a "U" shape on the track, driving the bone cutter to cut the intervertebral disc from all directions.

[0007] Furthermore, the back of the bone scalpel is equipped with a heat-insulating layer; the bone scalpel and handle are connected in an "L" shape, and the inner side has a certain curvature. The inner part of the connection between the bone scalpel and handle is curved, and the bone scalpel as a whole is shaped like an inverted sickle, conforming to the curvature of the dura mater, avoiding damage to the dura mater when the bone scalpel is placed below it. The heat-insulating layer on the back can reduce the conduction of heat from the blade to the surrounding tissues, ensuring the safety of the tissues around the surgical area and avoiding unnecessary thermal damage.

[0008] Furthermore, the slider has a cross-shaped opening; the tool holder has a hole that matches the horizontal hole of the opening; the slider has a pin that matches the horizontal hole of the opening; and the vertical hole of the opening matches the tool holder.

[0009] Furthermore, both the arc-shaped track and the connecting track are grooved tracks, and both are made of insulating and heat-insulating materials. The grooved track facilitates the sliding of the slider and allows for easy cleaning and disinfection for future use. The use of insulating and heat-insulating materials, which have a low thermal conductivity, limits heat transfer, ensuring that the temperature of the surgical area remains within a safe range, and effectively insulates against the heat generated by the sliding friction of the slider.

[0010] The working principle of this utility model is as follows:

[0011] In use, the curved track is guided along the lower periphery of the vertebral body to the other side via the handle on the left. The curved track is then connected to the threaded post at one end of the connecting track via the second slot at one end, facilitating the sliding of the slider. After the track is installed, the bone scalpel is passed under the dura mater and positioned above the intervertebral disc to be cut. The tip of the scalpel is engaged with the first slot of the connecting slider for limitation. The curvature above the bone scalpel prevents it from contacting the dura mater, thus avoiding any scratches. After placing the bone scalpel, the slider is moved along the curved track. First, the pin in the horizontal hole of the "+" shaped opening on the slider is removed. The handle is then passed through the vertical hole of the "+" shaped opening, and the pin is inserted back into the horizontal hole, passing through the hole in the handle to limit and fix the handle. This fixation effectively prevents the bone scalpel from rotating and cutting surrounding blood vessels and nerves. After installing the handle, the slider is controlled to move the bone scalpel along the track to cut the intervertebral disc.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through the design of an arc-shaped track and a connecting track that protects the vertebral body around the perimeter, can effectively ensure the safety of surrounding blood vessels and nerves. It can also locate the intervertebral disc to be cut. The bone cutter is driven by a slider and, in conjunction with the connecting slider, cuts the intervertebral disc along the track. While quickly cutting the intervertebral disc, it avoids the bone cutter shaking and cutting the vertebral body and cartilaginous endplate.

[0014] 2. The slider of this utility model can limit and fix the knife handle through the "+" shaped opening. While fixing the knife handle, it can also limit the rotation of the knife handle, so as to avoid the phenomenon that the rotation of the knife handle drives the bone knife to rotate, thereby accidentally injuring the nerve root and dura mater.

[0015] 3. The arc-shaped track and the connecting track of this utility model are connected by the threaded post and the slot of the connecting device, which facilitates disassembly. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the slider and the cutting device of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the connecting device of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the connecting slider of this utility model.

[0020] In the diagram: 1. Handle; 2. Arc-shaped track; 3. Cutting device; 4. Connecting track; 5. Slider; 501. Opening; 502. Pin; 6. Connecting device; 601. Threaded post; 602. Second slot; 7. Bone knife; 8. Knife handle; 801. Hole; 9. Connecting slider; 901. First slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The following is a detailed description of a sliding arc-shaped intervertebral disc cutter according to the present invention, with reference to the accompanying drawings: Example

[0023] A sliding arc-shaped intervertebral disc cutter includes a handle 1, an arc-shaped track 2, a cutting device 3, and a connecting track 4. The handle 1 is fixedly installed at one end of the arc-shaped track 2. The arc-shaped track 2 is provided with a slider 5 and a connecting device 6. The connecting device 6 includes a threaded post 601 and a second slot 602. The second slot 602 matches the threaded post 601. The threaded post 601 is fixedly installed at one end of the connecting track 4. The second slot 602 is located at the other end of the arc-shaped track 2. The arc-shaped track 2 is connected to the connecting track 4 through the threaded post 601 and the second slot 602. The slider 5 is slidably connected to the arc-shaped track 2. The slider 5 has a cross-shaped design. The cutting device 3 includes a bone blade 7 and a handle 8; the lower end of the handle 8 is fixedly connected to the bone blade 7, and the upper end of the handle 8 is provided with a hole 801 that matches the transverse hole of the opening 501, and is fixedly connected to the slider 5 through the hole 801 and the pin 502; the connecting rail 4 is provided with a connecting slider 9; the connecting slider 9 is slidably connected to the connecting rail 4, and is provided with a first groove 901 that matches the tip of the bone blade 7; the bone blade 7 and the handle 8 are connected in an "L" shape; the back of the bone blade 7 is provided with a heat insulation layer and has a certain curvature; the arc-shaped rail 2 and the connecting rail 4 are grooved rails and are both made of insulating and heat-insulating materials.

[0024] The working principle of this embodiment is as follows:

[0025] In use, the arc-shaped track 2 is guided along the lower periphery of the vertebral body to the other side via the handle 1 on the left side. The second slot 602 at one end of the arc-shaped track 2 is threaded into the threaded post 601 at one end of the connecting track 4, connecting the arc-shaped track 2 and the connecting track 4. This allows the slider 5 to slide along the track in an arc. After the track is installed, the bone cutter 7 is passed under the dura mater, positioned above the intervertebral disc to be cut, with its tip engaged in the first slot 901 of the connecting slider 9 for limitation. The curvature above the bone cutter 7 prevents it from contacting the dura mater, thus avoiding any scratches. After placing the bone cutter 7, it is placed on the arc-shaped track... 2. Move slider 5 initially above the handle 8. First, remove the pin 502 from the horizontal hole of the cross-shaped opening 501 on slider 5. Slightly move the handle below the vertical hole of the cross-shaped opening 501. Control slider 3 to slide downwards and fit onto handle 8. Handle 8 passes through the vertical hole of opening 501, so that hole 801 matches the horizontal hole of opening 501. Insert the pin back into the horizontal hole and pass through hole 801 of handle 8 to limit and fix handle 8. While fixing handle 8, it can effectively prevent bone knife 7 from rotating, causing bone knife 7 to cut the surrounding blood vessels and nerves. After installing handle 8, control slider 5 to drive bone knife 7 to slide along the track to cut the intervertebral disc.

[0026] Finally, it should be noted that in total vertebral resection surgery for spinal tumors, it is necessary to protect the important nerve and blood vessel structures around the intervertebral disc to avoid damage. This utility model uses a track to encircle the vertebral body, isolating the nerves and blood vessels around the vertebral body for protection. Furthermore, based on the slider sliding on the track to drive the bone cutter to cut the intervertebral disc, the complete removal of tumor tissue can be ensured. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sliding arc-shaped intervertebral disc cutter, characterized in that: It includes a handle (1), an arc-shaped track (2), a cutting device (3), and a connecting track (4); the handle (1) is fixedly installed at one end of the arc-shaped track (2); the arc-shaped track (2) is provided with a slider (5) and a connecting device (6); the arc-shaped track (2) is connected to the connecting track (4) through the connecting device (6); the slider (5) is slidably connected to the arc-shaped track (2); The cutting device (3) includes a bone knife (7) and a handle (8); the lower end of the handle (8) is fixedly connected to the bone knife (7), and the upper end is fixedly connected to the slider (5); The connecting rail (4) is provided with a connecting slider (9); the connecting slider (9) is slidably connected to the connecting rail (4) and has a first slot (901) that matches the tip of the bone knife (7).

2. The sliding arc-shaped intervertebral disc cutter according to claim 1, characterized in that: The connecting device (6) includes a threaded post (601) and a second slot (602); the second slot (602) matches the threaded post (601); the threaded post (601) is fixedly installed at one end of the connecting rail (4); the second slot (602) is opened at the other end of the arc-shaped rail (2).

3. The sliding arc-shaped intervertebral disc cutter according to claim 1, characterized in that: The back of the bone knife (7) is provided with a heat insulation layer; the bone knife (7) and the handle (8) are connected in an "L" shape, and the inner side is provided with a certain curvature.

4. The sliding arc-shaped intervertebral disc cutter according to claim 1, characterized in that: The slider (5) has a cross-shaped opening (501); the tool holder (8) has a hole (801) that matches the horizontal hole of the opening (501); the slider (5) has a pin (502) that matches the horizontal hole of the opening (501); the vertical hole of the opening (501) matches the tool holder (8).

5. A sliding arc-shaped intervertebral disc cutter according to claim 1, characterized in that: The arc-shaped track (2) and the connecting track (4) are grooved tracks, and both are made of insulating and heat-insulating materials.

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