A combination surgical instrument

Abstract

This invention discloses a combined surgical instrument, comprising a vertebral intervertebral space-opening seat and an operating rod. The vertebral intervertebral space-opening seat has a mounting hole and a cavity connected to the lower end of the mounting hole. A pair of opening plates are disposed within the cavity, and each opening plate has a first connecting portion. The operating rod is disposed within the mounting hole and extends its lower end between the pair of opening plates. The lower end of the operating rod has two helical segments with opposite helical directions, each equipped with a sliding seat. Second connecting portions are provided on both sides of the sliding seats. The second connecting portions on the two sliding seats are symmetrically arranged above and below the first connecting portion. An opening rod is disposed between the first connecting portion and the second connecting portion on the same side. One end of the opening rod is hinged to the first connecting portion, and the other end is hinged to the second connecting portion. This invention has advantages such as reliable structure and the ability to continuously and stably open the intervertebral space.

Description

Technical Field

[0001] This invention relates to medical devices, and more particularly to a combination surgical instrument. Background Technology

[0002] Periosteal elevators are commonly used surgical instruments in orthopedics and spinal surgery. A good periosteal elevator directly affects the convenience and safety of the surgeon's operation. Depending on the surgeon's needs, the head of the periosteal elevator is designed in various shapes: some are suitable for dissecting muscles, some are suitable for pressing bone fragments or pushing away paravertebral structures, and some are suitable for chiseling or blunt dissection.

[0003] Currently, almost all periosteal elevators on the market are of a single, handle-like design, lacking both length adjustment and style variation. For complex orthopedic or spinal surgeries, scrub nurses often need to prepare multiple elevators or even sets to meet different operational needs, increasing operating room and labor costs, as well as the difficulty of instrument management. When dealing with patients of certain physical characteristics (such as children or obese patients), the fixed length and style of the elevator present the problem of being "too long" or "too short," severely impacting the surgeon's operation. Furthermore, when encountering patients with bone destruction or requiring osteotomy, some surgeons may even insert the elevator into the intervertebral space to moderately pry it open, in order to gain more access. Such operations are neither standardized nor safe, and can easily damage the spinal cord and nerves with the slightest carelessness.

[0004] Therefore, there is an urgent need for a periosteal elevator that can adjust its length and shape and has a local dispersing function. It should not only be able to select the appropriate length according to the patient's physique, but also be able to change different head shapes and overall forms according to the needs of the operation. At the same time, it should be able to stably, continuously and reliably dissect the intervertebral space, taking into account the convenience of operation, safety and efficient management of the device, so as to fundamentally improve the cost performance of the periosteal elevator. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a combined surgical instrument with a reliable structure that can continuously and stably open the intervertebral space.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A combined surgical instrument includes a vertebral interbody spacer and an operating rod. The vertebral interbody spacer has a mounting hole and a cavity connected to the lower end of the mounting hole. A pair of spacer plates are provided in the cavity. The spacer plates have a first connecting portion. The operating rod is located in the mounting hole and its lower end extends between the pair of spacer plates. The lower end of the operating rod has two helical segments with opposite helical directions and each is equipped with a sliding seat. The sliding seats have second connecting portions on both sides. The second connecting portions on the two sliding seats are symmetrically arranged on the upper and lower sides of the first connecting portion. A spacer rod is provided between the first connecting portion and the second connecting portion on the same side. One end of the spacer rod is hinged to the first connecting portion, and the other end is hinged to the second connecting portion.

[0008] As a further improvement to the above technical solution: the intervertebral space spreading seat is provided with two first side surfaces perpendicular to the spreading plate, and the lower ends of the two first side surfaces are arc-shaped and intersect to form a cutting edge.

[0009] As a further improvement to the above technical solution: the combined surgical instrument also includes a handle, the mounting hole is a threaded hole, two second sides perpendicular to the first sides are provided between the two first sides, the first side and / or the second side are provided with threaded connection holes, and the handle is provided with a third connecting part that can be connected to the threaded connection hole and the mounting hole.

[0010] Compared with the prior art, the advantages of the present invention are as follows: The combined surgical instrument disclosed in the present invention has a cavity inside the intervertebral space-opening seat to accommodate a pair of opening plates. An operating rod extends through a mounting hole to the space between the pair of opening plates. The lower end of the operating rod has two helical segments with opposite helical directions and is equipped with sliding seats respectively. The second connecting parts on the two sliding seats are symmetrically arranged with respect to the first connecting parts on the opening plates. The first connecting parts and the second connecting parts on the same side are connected by the opening rod. Both ends of the opening rod are hinged structures. When it is necessary to open the intervertebral space, the intervertebral space-opening seat is first opened. Placed between the two vertebrae, the operating lever is rotated to bring the two sliding seats closer together. The vertical components of the forces exerted by the two sliding seats on the expansion plate through the expansion lever cancel each other out, while the horizontal components work together to push the expansion plate horizontally outward continuously and stably, ensuring good safety and high structural reliability. After expansion is complete, the operating lever is rotated in the opposite direction to move the two sliding seats away from each other. The vertical components of the forces exerted by the two sliding seats on the expansion plate through the expansion lever cancel each other out, while the horizontal components work together to pull the expansion plate horizontally back into the cavity, allowing the intervertebral space expansion seat to be removed. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the combined surgical instrument of the present invention.

[0012] Figure 2This is a schematic diagram of the internal structure of the combined surgical instrument of the present invention.

[0013] Figure 3 This is a three-dimensional structural diagram of the handle in this invention.

[0014] The labels in the diagram represent: 1. Intervertebral space opening seat; 2. Operating rod; 3. Opening plate; 4. First connecting part; 5. Sliding seat; 6. Second connecting part; 7. Opening rod; 8. Mounting hole; 9. First side; 10. Cutting edge; 11. Handle; 12. Second side; 13. Threaded connection hole; 14. Third connecting part; 15. Cavity. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figures 1 to 3 This invention illustrates an embodiment of the combined surgical instrument, which includes a vertebral interbody spacer 1 and an operating rod 2. The vertebral interbody spacer 1 has a mounting hole 8 and a cavity 15 connected to the lower end of the mounting hole 8. A pair of spacer plates 3 are provided in the cavity 15, and a first connecting part 4 is provided on the spacer plate 3. The operating rod 2 is located in the mounting hole 8 and its lower end extends between the pair of spacer plates 3. The lower end of the operating rod 2 has two helical segments with opposite helical directions and is respectively equipped with a sliding seat 5. A second connecting part 6 is provided on both sides of the sliding seat 5. The second connecting parts 6 on the two sliding seats 5 are symmetrically arranged on the upper and lower sides of the first connecting part 4. A spacer rod 7 is provided between the first connecting part 4 and the second connecting part 6 on the same side. One end of the spacer rod 7 is hinged to the first connecting part 4, and the other end is hinged to the second connecting part 6.

[0017] This modular surgical instrument includes a cavity 15 within the intervertebral space-opening seat 1, which accommodates a pair of opening plates 3. An operating rod 2 extends through a mounting hole 8 between the pair of opening plates 3. The lower end of the operating rod 2 has two helical segments with opposite spiral directions, each equipped with a sliding seat 5. The second connecting portions 6 on the two sliding seats 5 are symmetrically arranged about the first connecting portions 4 on the opening plates 3. The first connecting portions 4 and the second connecting portions 6 on the same side are connected by an opening rod 7, both ends of which are hinged. When it is necessary to open the intervertebral space, the intervertebral space-opening seat 1 is first placed between the two vertebrae, then... Rotate the operating lever 2 to bring the two sliding seats 5 closer together. The vertical components of the forces acting on the expansion plate 3 by the expansion lever 7 of the two sliding seats 5 cancel each other out, while the horizontal components work together to push the expansion plate 3 horizontally outward continuously and stably, ensuring good safety and high structural reliability. After the expansion is completed, rotate the operating lever 2 in the opposite direction to move the two sliding seats 5 away from each other. The vertical components of the forces acting on the expansion plate 3 by the expansion lever 7 of the two sliding seats 5 cancel each other out, while the horizontal components work together to pull the expansion plate 3 horizontally back into the cavity 15, allowing the intervertebral space expansion seat 1 to be removed.

[0018] Furthermore, in this embodiment, the intervertebral space-opening seat 1 is provided with two first side surfaces 9 perpendicular to the opening plate 3. The lower ends of the two first side surfaces 9 are arc-shaped and intersect to form a cutting edge 10. This structure facilitates the insertion of the intervertebral space-opening seat 1 into the gap between the two vertebrae and then prying it open at 90°. On the other hand, it allows the intervertebral space-opening seat 1 to be used for periosteal dissection after being connected to the handle 11, etc., achieving multiple uses. For example, first push the opening plate 3 out of the cavity 15, disassemble the connection between the opening plate 3 and the opening rod 7, then unscrew the two sliding seats 5 from the operating rod 2 from bottom to top, and finally take out the operating rod 2 from the mounting hole 8, and install the handle 11 or other components that provide convenient operation into the mounting hole 8.

[0019] Furthermore, in this embodiment, the combined surgical instrument also includes a handle 11, a threaded mounting hole 8, and two second side surfaces 12 perpendicular to the first side surfaces 9, i.e., the second side surfaces 12 are parallel to the spreading plate 3. Both the first side surfaces 9 and the second side surfaces 12 are provided with threaded connection holes 13. The handle 11 is provided with a third connecting part 14 that can connect to the threaded connection holes 13 and the mounting hole 8. Depending on the surgeon's needs, when the handle 11 is connected to different threaded connection holes 13 or mounting holes 8, instruments of different lengths and shapes can be obtained, which is more convenient and also helps to save costs.

[0020] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A combination surgical instrument, characterized in that: The device includes a vertebral interbody space opening seat (1), an operating rod (2), and a handle (11). The vertebral interbody space opening seat (1) has an installation hole (8) and a cavity (15) connected to the lower end of the installation hole (8). A pair of opening plates (3) are provided in the cavity (15). A first connecting part (4) is provided on the opening plate (3). The operating rod (2) is located in the installation hole (8) and its lower end extends between the pair of opening plates (3). The lower end of the operating rod (2) has two spiral segments with opposite spiral directions and is equipped with sliding seats (5) respectively. A second connecting part (6) is provided on both sides of the sliding seat (5). The second connecting parts (6) on the two sliding seats (5) are symmetrically arranged on the upper and lower sides of the first connecting part (4). An opening rod (7) is provided between the first connecting part (4) and the second connecting part (6) on the same side. One end of the spreading rod (7) is hinged to the first connecting part (4), and the other end is hinged to the second connecting part (6). The intervertebral space spreading seat (1) is provided with two first side surfaces (9) perpendicular to the spreading plate (3). The lower ends of the two first side surfaces (9) are arc-shaped and intersect to form a cutting edge (10). The intervertebral space spreading seat (1) can be inserted into the gap between the two vertebrae and then rotated 90° to pry it open, or the intervertebral space spreading seat (1) can be connected to the handle (11) for periosteal stripping. First, push the spreading plate (3) out of the cavity (15), disassemble the connection between the spreading plate (3) and the spreading rod (7), and then rotate the two sliding seats (5) out of the operating rod (2) from bottom to top. Finally, take out the operating rod (2) from the mounting hole (8) and install the handle (11) or other parts that can provide convenient operation in the mounting hole (8).

2. The combined surgical instrument according to claim 1, characterized in that: The mounting hole (8) is a threaded hole. Two second side surfaces (12) perpendicular to the first side surfaces (9) are provided between the two first side surfaces (9). Threaded connection holes (13) are provided on the first side surfaces (9) and / or the second side surfaces (12). A third connecting part (14) is provided on the handle (11) that can be connected to the threaded connection holes (13) and the mounting hole (8).

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