Minimally invasive atlantoaxial internal fixation device

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a minimally invasive atlas and axis internal fixation device, including base, the outside fixed connection of base has the mounting panel, the inside sliding connection of mounting panel has the bolt, the upper end contact of base has the connecting plate, the upper end fixed connection of connecting plate has the clamping plate, the inside clamping of clamping plate has the connecting rod, the lower fixed connection of connecting plate has the sliding block, the sliding block is connected with base. This minimally invasive atlas and axis internal fixation device is clamped connecting rod through a plurality of even distribution's clamping plate, can steady connecting rod from multiple directions, greatly enhanced the stability of fixed. The sliding connection of cooperation guide rod and sliding block and the adjusting effect of threaded rod, can accurate adjustment position. In operation, the doctor can more conveniently install the device to the position, ensure the fixed effect, help the patient postoperative recovery, reduce the risk because of the fixed instability brings.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a minimally invasive atlantoaxial internal fixation device. Background Technology

[0002] Minimally invasive atlantoaxial internal fixation devices are important tools for treating atlantoaxial-related conditions. In clinical application, they have demonstrated numerous advantages. The device can be implanted through a tiny incision, greatly reducing trauma to the patient. Postoperative pain is less, recovery is faster, and hospital stays are effectively shortened, allowing patients to return to normal life more quickly. Its fixation effect is significant, accurately locating and firmly fixing the atlantoaxial joint, providing stable support for injured or diseased areas, aiding in fracture healing and dislocation reduction, and greatly reducing the risk of secondary injury due to instability. According to the utility model disclosed in patent authorization announcement number CN204446071U, the atlantoaxial dislocation reduction internal fixation device includes a connecting rod, lateral block screws, and lamina occlusion screws. The connecting rod is U-shaped, and the lateral block screws are respectively set on both sides of the connecting rod to form a fixing bracket. There are two lamina occlusion screws, which are respectively installed on the connecting rod by set screws. The lamina occlusion screw includes an occlusion forceps and a lifting sleeve. One end of the occlusion forceps hooks onto the posterior arch of the atlas, and the other end is connected to the lifting sleeve. The other end of the lifting sleeve is provided with a U-shaped opening and has a built-in spring. The connecting rod is located above the spring in the U-shaped opening and is fixed by set screws.

[0003] However, minimally invasive atlantoaxial internal fixation devices present challenges in terms of precise positioning and ease of operation during installation and use. During installation, existing devices may lack a sufficiently precise positioning mechanism, making it difficult for components to be accurately positioned. This not only increases the complexity and difficulty of the surgical procedure but may also affect the fixation effect and stability. Inconvenience in use can reduce the efficiency of the entire treatment process and even minor errors can affect the patient's postoperative recovery, posing challenges to clinical application. Utility Model Content

[0004] The purpose of this invention is to provide a minimally invasive atlantoaxial internal fixation device, which solves the problem that the minimally invasive atlantoaxial internal fixation device may be difficult to adjust accurately during installation and is not convenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a minimally invasive atlantoaxial internal fixation device, comprising a base, an mounting plate fixedly connected to the outer side of the base, a bolt slidably connected to the inner side of the mounting plate, a connecting plate contacting the upper end of the base, a clamping plate fixedly connected to the upper end of the connecting plate, a connecting rod clamped inside the clamping plate, a slider fixedly connected to the lower end of the connecting plate, the slider slidably connected to the base, and a threaded rod rotatably connected inside the base.

[0006] Preferably, there are multiple clamps, which are evenly distributed on the connecting rod. The design of the clamps can limit the movement of the connecting rod.

[0007] Preferably, a guide rod is fixedly connected inside the base, and the guide rod is slidably connected to the slider. The design of the guide rod can guide the slider.

[0008] Preferably, the outer side of the threaded rod is provided with positive and negative threads, and the threaded rod is connected to the slider by threads. Through the design of the threaded rod, two sliders can be moved simultaneously.

[0009] Preferably, a retaining ring is fixedly connected to the outer side of the threaded rod, and the retaining ring contacts the inner wall of the base. The retaining ring is designed to limit the movement of the threaded rod.

[0010] Preferably, a knob is fixedly connected to the end of the threaded rod away from the base. The knob contacts the base, and the design of the knob allows for convenient rotation of the threaded rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This minimally invasive atlantoaxial internal fixation device uses multiple evenly distributed splints to clamp the connecting rod, stabilizing it from multiple directions and greatly enhancing fixation stability. Combined with the sliding connection between the guide rod and the slider, and the adjustment function of the threaded rod, precise positional adjustment is possible. During surgery, the surgeon can more easily install the device, ensuring effective fixation, aiding postoperative recovery, and reducing the risks associated with unstable fixation.

[0013] 2. This device features a threaded rod with both positive and negative threads on the outside, which connect to the slider threadedly. The slider position can be easily adjusted by rotating the threaded rod with a knob, making operation convenient. The bolt design for the sliding connection between the base and the mounting plate facilitates the installation and fixation of the device. In practical applications, this design allows doctors to make fine adjustments according to the patient's specific condition, achieving precise positioning, while also improving surgical efficiency and reducing patient discomfort. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model;

[0015] Figure 2 For the present utility model Figure 1 A three-dimensional view of the local structure;

[0016] Figure 3 For the present utility model Figure 1 A partial structural front sectional view;

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of part A of the structure.

[0018] In the diagram: 1. Base; 11. Mounting plate; 12. Bolt; 2. Connecting plate; 21. Clamping plate; 22. Connecting rod; 3. Slider; 31. Guide rod; 32. Threaded rod; 33. Retaining ring; 34. Knob. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 A minimally invasive atlantoaxial internal fixation device includes a base 1, an mounting plate 11 fixedly connected to the outer side of the base 1, a bolt 12 slidably connected to the inner side of the mounting plate 11, a connecting plate 2 in contact with the upper end of the base 1, a clamping plate 21 fixedly connected to the upper end of the connecting plate 2, a connecting rod 22 clamped inside the clamping plate 21, and multiple clamping plates 21 evenly distributed on the connecting rod 22. Through the design of the clamping plates 21, the connecting rod 22 can be limited.

[0021] Please see Figure 2-4 A slider 3 is fixedly connected to the lower end of the connecting plate 2. The slider 3 is slidably connected to the base 1. A guide rod 31 is fixedly connected inside the base 1. The guide rod 31 is slidably connected to the slider 3. The guide rod 31 can guide the slider 3. A threaded rod 32 is rotatably connected inside the base 1. The outer side of the threaded rod 32 is provided with positive and negative threads. The threaded rod 32 is threadedly connected to the slider 3. The threaded rod 32 can drive the two sliders 3 to move at the same time.

[0022] Please see Figure 2-4 A retaining ring 33 is fixedly connected to the outer side of the threaded rod 32. The retaining ring 33 contacts the inner wall of the base 1. The retaining ring 33 can limit the threaded rod 32. A knob 34 is fixedly connected to the end of the threaded rod 32 away from the base 1. The knob 34 contacts the base 1. The knob 34 can be used to easily rotate the threaded rod 32.

[0023] The specific implementation process of this utility model is as follows: In use, the base 1 is placed in a predetermined position, and the base 1 is fixed near the surgical site by the bolt 12 that is slidably connected to the inner side of the mounting plate 11. During the fixing process, the position of the base 1 can be finely adjusted according to actual needs until a preliminary satisfactory positioning effect is achieved. By rotating the knob 34, since the outer side of the threaded rod 32 is provided with positive and negative threads and is threadedly connected to the slider 3, and the base 1 is fixedly connected to the guide rod 31 that is slidably connected to the slider 3, under the rotation of the knob 34, the slider 3 will move precisely along the direction of the guide rod 31, thereby driving the connecting plate 2 and the clamping plate 21 to move, so that the clamping plate 21 clamps the connecting rod 22, thereby facilitating the installation of the connecting rod 22.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive atlantoaxial internal fixation device, comprising a base (1), characterized in that: An mounting plate (11) is fixedly connected to the outer side of the base (1), and a bolt (12) is slidably connected to the inner side of the mounting plate (11). A connecting plate (2) is in contact with the upper end of the base (1), and a clamping plate (21) is fixedly connected to the upper end of the connecting plate (2). A connecting rod (22) is clamped inside the clamping plate (21), and a slider (3) is fixedly connected to the lower end of the connecting plate (2). The slider (3) is slidably connected to the base (1), and a threaded rod (32) is rotatably connected inside the base (1).

2. The minimally invasive atlantoaxial internal fixation device according to claim 1, characterized in that: The number of clamps (21) is multiple, and the multiple clamps (21) are evenly distributed on the connecting rod (22).

3. The minimally invasive atlantoaxial internal fixation device according to claim 1, characterized in that: The base (1) is internally fixedly connected to a guide rod (31), which is slidably connected to the slider (3).

4. The minimally invasive atlantoaxial internal fixation device according to claim 1, characterized in that: The threaded rod (32) is provided with positive and negative threads on its outer side, and the threaded rod (32) is connected to the slider (3) by threads.

5. The minimally invasive atlantoaxial internal fixation device according to claim 1, characterized in that: A retaining ring (33) is fixedly connected to the outside of the threaded rod (32), and the retaining ring (33) contacts the inner wall of the base (1).

6. The minimally invasive atlantoaxial internal fixation device according to claim 1, characterized in that: A knob (34) is fixedly connected to one end of the threaded rod (32) away from the base (1), and the knob (34) is in contact with the base (1).

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