Expandable mesh bag for implantation
By designing an inflatable braided mesh bag, the problem of limited implant space and damage to human bone tissue during minimally invasive spinal fusion surgery is solved, and the mesh bag is quickly expanded and filled with the lesion after implantation through narrow channels and injected into the filler, promoting rapid fusion.
Patent Information
- Application Number
- CN202421189126.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In minimally invasive spinal fusion surgery, the implantation of existing hard fusion devices leads to limited implantation space, insufficient implanted bone tissue, poor fusion effect, and causing great damage to the human bone tissue during the implantation process.
An inflatable woven mesh bag is designed with scalability and flexibility, reaching the lesion through a narrow surgical channel and rapidly expanding after injection of the filler to fill the lesion site.
The mesh bag can be implanted through narrow channels, injected into the filler and expanded to fill the lesion site, increasing the implant volume, promoting the growth of new tissues, achieving the purpose of rapid fusion, and reducing the damage to the human bone tissue.
Smart Images
Figure CN222657267U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to an expandable mesh bag for implantation. Background Art
[0002] In minimally invasive spinal fusion surgery, bone tissue and a fusion device need to be implanted into the intervertebral space. After the fusion device is implanted into the bone tissue, it is placed into the intervertebral space to restore the intervertebral space height and enable effective fusion of the upper and lower vertebrae.
[0003] However, the fusion device currently used for fusion is made of hard material and is large in size, so the space in which it can be implanted is limited. In this way, not only is the implanted bone tissue limited, resulting in a limited contact area between the upper and lower end plates, which greatly affects the fusion effect, but also when inserting the fusion device, in order to allow it to smoothly pass through the surgical channel into the intervertebral space, many large channels need to be established, which will cause great damage to the human bone tissue, resulting in great damage and a long recovery period. Utility Model Content
[0004] In view of the above problems, the present application provides an expandable mesh bag for implantation which is not only soft but also retractable, and can easily pass through a narrow surgical channel to reach the lesion.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] An expandable mesh bag for implantation, having an opening and a blind end opposite to the opening, the woven mesh bag having retractability and being made by weaving;
[0007] When the filler is injected, the volume of the woven mesh bag increases, and the mesh holes of the woven mesh bag also increase accordingly.
[0008] Furthermore, the woven mesh bag includes a sparse portion and a dense portion in sequence from the blind end to the opening, and the dense portion is a shrinking structure.
[0009] Furthermore, the woven mesh bag is provided with a tightening rope for tightening the opening.
[0010] Furthermore, the middle portion of the tightening rope is reciprocatedly inserted into the inner and outer sides of the woven mesh bag, and the two free ends of the tightening rope pass through the side walls of the woven mesh bag and extend to the outside of the woven mesh bag. When the two free ends are pulled, the woven mesh bag can be partially tightened.
[0011] Furthermore, the tightening rope is located at the connection between the sparse part and the dense part.
[0012] Furthermore, the woven mesh bag has greater elasticity in the transverse direction than in the longitudinal direction.
[0013] Furthermore, the end opposite to the opening is in an open structure, and a blind end is formed by bundling.
[0014] Furthermore, the binding portion of the blind end is located inside the woven mesh bag.
[0015] The beneficial effects of the utility model are:
[0016] The expandable mesh bag provided in the embodiment of the present application is elastically woven, not only soft but also retractable, and can be applied to the vertebral body and intervertebral space. During surgery, it is convenient to reach the lesion through a narrow surgical channel, and the mesh bag placed in the lesion can expand rapidly with the injection of fillers (autologous bone, allogeneic bone, bone paste, bone cement), which can not only confine the fillers within a certain area, but also fill the lesion well.
[0017] In addition, when the expandable mesh bag provided in the embodiment of the present application is used, as the filler (autologous bone, allogeneic bone, bone paste, bone cement) is injected, the volume of the mesh bag increases, and the mesh of the mesh bag can be enlarged to a certain extent. In this way, not only the implanted amount of the filler can be increased, but also the filler can be fully contacted with the surrounding tissue, which is conducive to the growth of new tissue to achieve the purpose of rapid fusion. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of the structure of an expandable mesh bag for implantation in a contracted state provided in an embodiment of the present application;
[0019] Figure 2 A schematic diagram of a tying structure for implanting an expandable mesh bag provided in an embodiment of the present application;
[0020] Figure 3 A schematic diagram of the structure of an expandable mesh bag for implantation in an expanded state provided in an embodiment of the present application;
[0021] Figure 4 A schematic diagram of a blind end structure for implanting an expandable mesh bag provided in an embodiment of the present application;
[0022] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A.
[0023] In the figure: 1, woven mesh bag; 11, opening; 12, blind end; 121, binding part; 13, sparse part; 14, dense part;
[0024] 2. Tie the rope tightly; 211. Inner section; 212. Outer section; 22. Free end. DETAILED DESCRIPTION
[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work on the basis of the embodiments of the present application shall belong to the protection scope of the present application.
[0026] like Figure 1 As shown, an expandable mesh bag for implantation has a pocket-shaped structure and is made by weaving textile threads, and is retractable. The woven mesh bag 1 has an opening 11, and a blind end 12 is opposite to the opening 11.
[0027] For the convenience of description, the direction of the line connecting the opening 11 and the blind end 12 is defined as the longitudinal direction, and the direction perpendicular to the longitudinal direction is defined as the transverse direction.
[0028] like Figure 1 As shown, the woven mesh bag 1 includes a loosely woven sparse part 13 and a densely woven dense part 14 from the blind end 12 to the opening 11, and the dense part 14 is a constricted structure to facilitate connection and fixation with the medical device. The sparse part 13 has better elasticity due to the loose weaving, and the dense part 14 has less elasticity than the sparse part 13 due to the dense weaving, but has better compactness, so it can be better clamped on the installation end of the medical device to facilitate the installation of the woven mesh bag 1.
[0029] like Figure 1 and Figure 2 As shown, the woven mesh bag 1 is provided with a tightening rope 2 for tightening the opening 11. The middle portion of the tightening rope 2 is in a serpentine structure, and is reciprocatedly inserted between the inner and outer sides of the woven mesh bag 1. That is, the middle portion of the tightening rope 2 includes an inner section 211 located inside the woven mesh bag 1 and an outer section 212 located outside the woven mesh bag 1, and the inner section 211 and the outer section 212 are arranged at intervals. The two ends of the tightening rope 2 are free ends 22, and both of the free ends 22 pass through the side walls of the woven mesh bag 1 and extend to the outside of the woven mesh bag 1. Figure 3 As shown, when in use, the woven mesh bag 1 can be partially tightened by pulling the two free ends 22, and then the tightening rope 2 can be tied by knotting to close and tighten the opening 11 to prevent the filling from flowing out of the opening 11.
[0030] Preferably, the tightening rope 2 is located at the connection between the sparse portion 13 and the dense portion 14 .
[0031] like Figure 1 and Figure 3As shown, when used, as the filler is injected, the volume of the mesh bag increases, and the mesh of the mesh bag can be enlarged to a certain extent. In this way, the bone cement can fully contact the surrounding tissues, which is conducive to the growth of new tissues to achieve the purpose of rapid fusion.
[0032] Furthermore, if Figure 1 and Figure 3 As shown, the woven mesh bag 1 has a greater elasticity in the transverse direction than in the longitudinal direction.
[0033] Thus, when the woven mesh bag 1 is in a contracted state, the woven mesh bag 1 is in an elongated state as a whole, and can pass through a narrow surgical channel more conveniently. After entering the lesion site, the mesh bag can be rapidly expanded laterally by injecting fillers, thereby filling the lesion site and making the fillers fully contact with the surrounding tissues.
[0034] Furthermore, if Figure 4 and Figure 5 As shown, the end opposite to the opening 11 is in an open structure, and a closed blind end 12 is formed by bundling.
[0035] In this way, when the opening 11 of the woven mesh bag 1 is tied tightly by the tying rope 2, the woven mesh bag 1 as a whole has a structure with two ends tied tightly, and after the filling is injected, it will form a structure as follows: Figure 3 The nearly spherical structure shown is more conducive to matching the filling cavity formed by the previous expansion orthosis.
[0036] Furthermore, the binding portion 121 of the blind end 12 is located inside the woven mesh bag 1. In this way, after the filler is injected, the outer portion of the blind end 12 presents a smooth structure, which is more conducive to filling the filling cavity formed by the early expansion orthosis.
[0037] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments of the present application on the basis of the embodiments provided in the present application do not exceed the protection scope of the present application.
[0038] The above specific implementation methods have detailed the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. That is, any modifications, equivalent substitutions, improvements, etc. made on the basis of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.
Claims
1. An expandable mesh bag for implantation, characterized in that: The woven mesh bag (1) has an opening (11) and a blind end (12) opposite to the opening (11), and is retractable and made by weaving; When the filler is injected, the volume of the woven mesh bag (1) increases, and the mesh holes of the woven mesh bag (1) also increase accordingly.
2. The expandable mesh bag for implantation according to claim 1, characterized in that: The woven mesh bag (1) comprises a sparse portion (13) and a dense portion (14) in sequence from the blind end (12) to the opening (11), and the dense portion (14) is a shrinking structure.
3. The expandable mesh bag for implantation according to claim 2, characterized in that: The woven mesh bag (1) is provided with a tightening rope (2) for tightening the opening (11).
4. The expandable mesh bag for implantation according to claim 3, characterized in that: The middle portion of the tightening rope (2) is reciprocatedly inserted between the inner and outer sides of the woven mesh bag (1), and the two free ends (22) of the tightening rope (2) both pass through the side walls of the woven mesh bag (1) and extend to the outside of the woven mesh bag (1). When the two free ends (22) are pulled, the woven mesh bag (1) can be partially tightened.
5. The expandable mesh bag for implantation according to claim 3, characterized in that: The tightening rope (2) is located at the connection between the sparse part (13) and the dense part (14).
6. The expandable mesh bag for implantation according to claim 1, characterized in that: The woven mesh bag (1) has greater elasticity in the transverse direction than in the longitudinal direction.
7. The expandable mesh bag for implantation according to claim 1, characterized in that: The end opposite to the opening (11) is in an open structure, and a blind end (12) is formed by bundling.
8. The expandable mesh bag for implantation according to claim 7, characterized in that: The bundling portion (121) of the blind end (12) is located inside the woven mesh bag (1).