Combined convenient installation spinal posterior internal fixation device

Abstract

The utility model provides a kind of combined convenient installation spinal posterior internal fixation device, including fixed shaft main body, it is characterized by: the outside of the fixed shaft main body is equipped with locking screw thread, the upper end of the fixed shaft main body is equipped with universal movable connecting block, the top of the fixed shaft main body is provided with nut nail block, the lower end of the nut nail block is equipped with installation inner hole, the universal movable connecting block extends into installation inner hole, the lower end of the nut nail block is fixedly connected with auxiliary hollow sandwich, the lower end of the auxiliary hollow sandwich is equipped with multiple medicine outlet holes, multiple the medicine outlet hole is annular equidistantly arranged between, the upper end of the medicine outlet hole is fixedly connected with bucket-shaped liquid storage inner chamber, the lower end of the bucket-shaped liquid storage inner chamber is equipped with sealed guide cavity, degradable ball plug is inserted into the inner end of the sealed guide cavity.

Description

Technical Field

[0001] This utility model relates to a convenient and modular posterior spinal fixation device, belonging to the field of medical device technology. Background Technology

[0002] Posterior spinal fixation devices are key medical devices used in spinal surgery to stabilize the spine and promote healing of lesions or injuries. They work by implanting specific devices posteriorly into the spine, and through the interaction of these devices, restore and maintain the normal shape and stability of the spine, thus assisting in the treatment of various spinal diseases.

[0003] A posterior spinal internal fixation rod with Chinese patent number CN221578003U belongs to the field of medical devices. It includes a pedicle screw and an orthopedic rod. The upper end of the pedicle screw has a placement groove, and the orthopedic rod is placed in the placement groove. The top of the pedicle screw has a pressure block, and the bottom of the pressure block is fixedly connected to a clamping block that matches the placement groove. The inside of the pressure block has a groove. Simply inserting the clamping block into the placement groove can simultaneously lock and fix the clamping block without adding extra operation steps, reducing the difficulty of operation, making operation more convenient, and improving work efficiency. Traditional internal fixation devices only have a single fixation function and lack auxiliary treatment functions, which makes preoperative preparation relatively limited. When faced with infection risks and bone healing problems, medical staff find it difficult to take effective and targeted intervention measures before surgery. In addition, some devices require complex debugging and assembly before installation, which not only consumes a lot of time, but also increases the difficulty and uncertainty of preoperative preparation.

[0004] Therefore, a convenient and modular posterior spinal fixation device is proposed. Utility Model Content

[0005] In view of this, the present invention provides a convenient and modular posterior spinal fixation device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this utility model is implemented as follows: A convenient and modular posterior spinal fixation device includes a fixed shaft body, characterized in that: a locking thread is provided on the outer side of the fixed shaft body; a universal movable connecting block is installed at the upper end of the fixed shaft body; a nut block is provided on the top of the fixed shaft body; an installation inner hole is provided at the lower end of the nut block; the universal movable connecting block extends into the installation inner hole; an auxiliary hollow sandwich plate is fixedly connected to the lower end of the nut block; multiple drug outlet holes are provided at the lower end of the auxiliary hollow sandwich plate; the multiple drug outlet holes are arranged in a ring at equal intervals; a funnel-shaped liquid storage chamber is fixedly connected to the upper end of the drug outlet holes; a sealing guide cavity is provided at the lower end of the funnel-shaped liquid storage chamber; and a biodegradable ball plug is inserted into the inner end of the sealing guide cavity.

[0007] More preferably, a nut block is movably connected to the upper end of the fixed shaft body, and an operating column is fixedly connected to the upper end of the nut block.

[0008] More preferably, a concave-convex anti-slip inner ring is fixedly connected to the middle of the inner wall of the sealed guide cavity, and the concave-convex anti-slip inner ring is in contact with the outer wall of the biodegradable ball plug.

[0009] More preferably, a removable partition layer is threadedly connected between the hopper-shaped liquid storage inner chamber and the sealed guide cavity, and a mesh liquid outlet layer is fixedly connected to the upper end of the removable partition layer.

[0010] More preferably, the inner end of the funnel-shaped liquid storage chamber is filled with several auxiliary agents, and the outer side of the operating column is fixedly coated with a color marking layer.

[0011] More preferably, a buffer pad is fixedly connected to the lower end of the auxiliary hollow sandwich panel, and the biodegradable ball plug is a biodegradable absorbent material.

[0012] More preferably, the fixed shaft body is installed to the posterior spinal surgery site via a locking thread, and several auxiliary drugs extend to the posterior spinal surgery site through a drug outlet.

[0013] The present invention has the following advantages due to the adoption of the above technical solution: 1. When using this utility model, medical staff can invert the nut block and accurately inject different types and dosages of auxiliary agents, such as antibiotics and bone growth promoters, into the funnel-shaped liquid reservoir according to treatment needs. The biodegradable ball plug, with the assistance of the concave-convex anti-slip inner ring, accurately seals the funnel-shaped liquid reservoir, preventing premature leakage of the agents and ensuring the flexibility and safety of preoperative preparation.

[0014] II. Based on the different material characteristics of the biodegradable ball plugs in different funnel-shaped liquid storage chambers after surgery, these plugs gradually degrade at different rates in the human physiological environment, precisely matching the wound healing process. This enables the timely and quantitative release of auxiliary drugs in the funnel-shaped liquid storage chambers. At the same time, the detachable partition layer with threaded connection between the funnel-shaped liquid storage chamber and the sealed guide cavity, as well as the mesh liquid outlet layer at its upper end, can effectively regulate the outflow of auxiliary drugs. Medical staff can flexibly control the release rate of auxiliary drugs according to different stages of wound healing, providing the right drug dosage to the affected area and significantly improving the treatment effect.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the posterior spinal internal fixation device of this utility model. Figure 2 This is a schematic diagram of the main structure of the fixed shaft of this utility model; Figure 3 This is an exploded structural diagram of the posterior spinal internal fixation device of this utility model. Figure 4 This is a schematic diagram of the nut block structure of this utility model; Figure 5 This is a schematic diagram of the hopper-shaped liquid storage inner chamber structure of this utility model; Figure 6 For the present utility model Figure 5 A magnified schematic diagram of a partial truncation of the medicine outlet.

[0018] Reference numerals in the attached diagram: 1. Fixed shaft body; 2. Locking thread; 3. Nut block; 4. Operating column; 5. Mounting inner hole; 6. Universal movable connecting block; 7. Auxiliary hollow sandwich plate; 8. Buffer pad; 9. Discharge hole; 10. Sealed guide cavity; 11. Bucket-shaped liquid storage inner tank; 12. Concave-convex anti-slip inner ring; 13. Biodegradable ball plug; 14. Removable partition layer; 15. Mesh surface liquid outlet layer; 16. Color marking layer. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] Example 1

[0022] like Figure 1-6 As shown, this utility model embodiment provides a convenient combination installation device for posterior spinal fixation, including a fixed shaft body 1. The device is characterized by: a locking thread 2 on the outer side of the fixed shaft body 1; a universal movable connecting block 6 installed at the upper end of the fixed shaft body 1; a nut block 3 at the top of the fixed shaft body 1; an installation inner hole 5 at the lower end of the nut block 3; the universal movable connecting block 6 extending into the installation inner hole 5; an auxiliary hollow sandwich plate 7 fixedly connected to the lower end of the nut block 3; multiple drug outlet holes 9 at the lower end of the auxiliary hollow sandwich plate 7; the multiple drug outlet holes 9 being arranged equidistantly in a ring; a funnel-shaped liquid storage chamber 11 fixedly connected to the upper end of the drug outlet holes 9; a sealing guide cavity 10 at the lower end of the funnel-shaped liquid storage chamber 11; and a biodegradable ball plug 13 inserted into the inner end of the sealing guide cavity 10.

[0023] A nut block 3 is movably connected to the upper end of the fixed shaft body 1. An operating column 4 is fixedly connected to the upper end of the nut block 3. A concave-convex anti-slip inner ring 12 is fixedly connected to the middle of the inner wall of the sealed guide cavity 10. The concave-convex anti-slip inner ring 12 is in contact with the outer wall of the biodegradable ball plug 13. A removable partition layer 14 is threadedly connected between the funnel-shaped liquid storage chamber 11 and the sealed guide cavity 10. A mesh liquid outlet layer 15 is fixedly connected to the upper end of the removable partition layer 14. The inner end of the funnel-shaped liquid storage chamber 11 is filled with several auxiliary agents.

[0024] Example 2

[0025] like Figure 4 As shown, in one embodiment, the outer side of the operating column 4 is fixedly coated with a color marking layer 16, the lower end of the auxiliary hollow sandwich panel 7 is fixedly connected with a buffer pad 8, the biodegradable ball plug 13 is a biodegradable absorbent material, the fixed shaft body 1 is installed to the posterior spinal surgery point through the locking thread 2, and several auxiliary agents extend to the posterior spinal surgery point through the drug outlet hole 9.

[0026] By applying a color-marking layer 16 to the outside of the operating column 4, clear identification is provided for medical staff during surgery and postoperative check-ups, facilitating quick identification of the position and status of the internal fixation device. Meanwhile, the buffer pad 8, which is fixedly connected to the lower end of the auxiliary hollow sandwich panel 7, effectively buffers pressure when the device comes into contact with surrounding tissues, reducing hard pressure on the surrounding tissues, lowering the risk of tissue damage, and providing patients with a better treatment experience.

[0027] In operation, this invention works as follows: Before surgery, medical staff, based on the surgical plan and the patient's actual condition, use the fixed shaft body 1 as the main anchoring component. Utilizing the locking threads 2 on its outer side, it is tightly connected to the matching anchoring structure, providing a stable support foundation for the entire internal fixation device. Simultaneously, the nut block 3 is inverted to open the funnel-shaped liquid reservoir 11. According to treatment needs, appropriate types and dosages of auxiliary agents, such as antibiotics for infection prevention and bone-growth-promoting drugs for accelerating bone healing, are injected into the funnel-shaped liquid reservoir 11. After insertion, the biodegradable ball plug 13 is precisely inserted into the sealed guide cavity 10 at the drug outlet 9, temporarily sealing the funnel-shaped liquid storage chamber 11 to prevent premature leakage of auxiliary drugs. During this process, the concave-convex anti-slip inner ring 12 fixed in the middle of the inner wall of the sealed guide cavity 10 effectively prevents the biodegradable ball plug 13 from shifting or tilting during insertion by increasing friction, ensuring the stability and accuracy of its insertion. During the operation, the fixing shaft body 1 is screwed into the predetermined surgical point of the posterior spinal approach through the locking thread 2 to achieve initial positioning of the spine. The universal movable connecting block 6 installed on the upper end of the main body 1 can rotate flexibly within a certain range, cooperating with the installation inner hole 5 opened at the lower end of the nut nail block 3. This ensures that the nut nail block 3 can be finely adjusted in angle according to the actual position of the surgical site, thereby achieving precise positioning. Subsequently, by rotating the nut nail block 3, it is tightly connected to the upper end of the fixing shaft main body 1, completing the installation of the entire internal fixation device and providing stable support for the spine. As the surgery progresses and the patient's wound heals, different biodegradable ball plugs 13, as biodegradable absorbable materials, under the influence of the human physiological environment... The process begins to degrade gradually, with the degradation rate matching the wound healing speed according to its material properties and design requirements. This allows the auxiliary medication in the funnel-shaped reservoir 11 to be released at regular intervals and in precise quantities through the drug outlet 9 to the posterior spinal surgery site. In addition, the removable partition layer 14, which is threaded between the funnel-shaped reservoir 11 and the sealed guide cavity 10, and the mesh liquid outlet layer 15 fixed at its upper end, can effectively regulate the outflow of the auxiliary medication and control the release rate of the auxiliary medication, ensuring that it provides an appropriate drug dosage to the affected area at different stages of wound healing.

[0028] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A convenient and modular posterior spinal fixation device, comprising a fixation shaft body (1), characterized in that: The outer side of the fixed shaft body (1) is provided with a locking thread (2). The upper end of the fixed shaft body (1) is provided with a universal movable connecting block (6). The top of the fixed shaft body (1) is provided with a nut nail block (3). The lower end of the nut nail block (3) is provided with an installation inner hole (5). The universal movable connecting block (6) extends into the installation inner hole (5). The lower end of the nut nail block (3) is fixedly connected with an auxiliary hollow sandwich plate (7). The lower end of the auxiliary hollow sandwich plate (7) is provided with multiple drug outlet holes (9). The multiple drug outlet holes (9) are arranged in a ring at equal intervals. The upper end of the drug outlet hole (9) is fixedly connected with a funnel-shaped liquid storage chamber (11). The lower end of the funnel-shaped liquid storage chamber (11) is provided with a sealing guide cavity (10). The inner end of the sealing guide cavity (10) is filled with a biodegradable ball plug (13).

2. The combined and convenient posterior spinal internal fixation device according to claim 1, characterized in that: The upper end of the fixed shaft body (1) is movably connected to a nut block (3), and the upper end of the nut block (3) is fixedly connected to an operating column (4).

3. The combined and convenient posterior spinal internal fixation device according to claim 1, characterized in that: The inner wall of the sealed guide cavity (10) is fixedly connected with a concave-convex anti-slip inner ring (12), and the concave-convex anti-slip inner ring (12) is in contact with the outer wall of the biodegradable ball plug (13).

4. The combined and convenient posterior spinal internal fixation device according to claim 1, characterized in that: A removable partition layer (14) is threadedly connected between the funnel-shaped liquid storage chamber (11) and the sealed guide cavity (10), and a mesh liquid outlet layer (15) is fixedly connected to the upper end of the removable partition layer (14).

5. The combined and convenient posterior spinal internal fixation device according to claim 2, characterized in that: The inner end of the funnel-shaped liquid storage chamber (11) is filled with several auxiliary agents, and the outer side of the operating column (4) is fixedly coated with a color marking layer (16).

6. The combined and convenient posterior spinal internal fixation device according to claim 1, characterized in that: The lower end of the auxiliary hollow sandwich panel (7) is fixedly connected to a buffer pad (8), and the biodegradable ball plug (13) is a biodegradable absorbent material.

7. The combined and convenient posterior spinal internal fixation device according to claim 5, characterized in that: The fixed shaft body (1) is installed to the posterior spinal surgery point through the locking thread (2), and several auxiliary drugs extend to the posterior spinal surgery point through the drug outlet (9).

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