Expandable mesh bag for implantation

Abstract

An expandable mesh bag for implantation provided in the present application relates to the technical field of medical instruments. The woven mesh bag has an opening and a blind end opposite the opening. The woven mesh bag is stretchable and is made by means of weaving. When a filler is injected, the volume of the woven mesh bag increases, and the mesh openings of the woven mesh bag also become larger. The expandable mesh bag for implantation provided in the present application is not only soft but also stretchable, and can conveniently reach a lesion through a narrow surgical channel without needing to be folded and contracted.

Description

An implantable expandable mesh bag Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an implantable expandable mesh bag. Background Technology

[0002] In minimally invasive spinal fusion surgery, bone tissue and a fusion device need to be implanted into the intervertebral space. After the bone tissue is implanted, the fusion device is placed into the intervertebral space to restore the height of the intervertebral space and enable the upper and lower vertebrae to fuse effectively.

[0003] However, current fusion devices used for fusion are made of rigid materials and are relatively large, limiting the space available for implantation. This not only limits the amount of bone tissue that can be implanted, resulting in a limited contact area with the upper and lower endplates and significantly affecting the fusion outcome, but also requires the creation of a very large channel to allow the fusion device to pass smoothly through the surgical channel into the intervertebral space, causing significant damage to the bone tissue, resulting in substantial injury and a long recovery period.

[0004] Utility Model Content

[0005] To address the aforementioned issues, this application provides an inflatable mesh bag for implantation that is not only soft but also stretchable, enabling it to easily reach the lesion through narrow surgical channels.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An implantable expandable mesh bag has an opening and a blind end opposite the opening. The woven mesh bag is stretchable and is made by weaving.

[0008] When the filler is injected, the volume of the woven mesh bag increases, and the mesh size of the woven mesh bag also increases accordingly.

[0009] Furthermore, the woven mesh bag includes a sparse portion and a dense portion from the blind end to the opening, and the dense portion has a constricted opening structure.

[0010] Furthermore, the woven mesh bag is provided with a tying rope for securing the opening.

[0011] Furthermore, the middle part of the tightening rope is repeatedly inserted into the inner and outer sides of the woven mesh bag, and both free ends of the tightening rope extend through the side wall of the woven mesh bag to the outside of the woven mesh bag. When the two free ends are pulled, the woven mesh bag can be locally tightened.

[0012] Furthermore, the tightening rope is located at the junction of the sparse and dense portions.

[0013] Furthermore, the woven mesh bag has greater stretchability in the transverse direction than in the longitudinal direction.

[0014] Furthermore, the end opposite to the opening is open and is formed into a blind end by binding.

[0015] Furthermore, the binding part of the blind end is located inside the woven mesh bag.

[0016] The beneficial effects of this utility model are:

[0017] This application provides an implantable expandable mesh bag made of elastic weave, which is not only soft but also stretchable, and can be applied to the vertebral body and intervertebral space. During surgery, it can be easily accessed through a narrow surgical channel to reach the lesion. The mesh bag placed inside the lesion can rapidly expand with the injection of filler (autologous bone, allogeneic bone, bone slurry, bone cement), which not only confines the filler within a certain area but also effectively fills the lesion.

[0018] Furthermore, the expandable mesh bag provided in this application increases in volume and the mesh openings can be enlarged to a certain extent during use as filler (autologous bone, allogeneic bone, bone slurry, bone cement) is injected. This not only increases the amount of filler implanted but also allows the filler to fully contact the surrounding tissue, facilitating the ingrowth of new tissue and achieving rapid fusion. Attached Figure Description

[0019] Figure 1 is a schematic diagram of a structure for implanting an expandable mesh bag in a contracted state, according to an embodiment of this application.

[0020] Figure 2 is a schematic diagram of a closure structure for implanting an expandable mesh bag according to an embodiment of this application;

[0021] Figure 3 is a schematic diagram of a structure for implanting an expandable mesh bag in an expanded state, according to an embodiment of this application.

[0022] Figure 4 is a schematic diagram of a blind end structure for implanting an expandable mesh bag according to an embodiment of this application;

[0023] Figure 5 is an enlarged structural diagram of part A in Figure 4.

[0024] In the diagram: 1. Woven mesh bag; 11. Opening; 12. Blind end; 121. Binding section; 13. Loose section; 14. Dense section;

[0025] 2. Tighten the rope; 211. Inner section; 212. Outer section; 22. Free end. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0027] As shown in Figure 1, an expandable mesh bag for implantation has a pocket-like structure and is made by weaving textile threads, giving it elasticity. The woven mesh bag 1 has an opening 11, and opposite the opening 11 is a blind end 12.

[0028] For ease 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.

[0029] As shown in Figure 1, the woven mesh bag 1, from the blind end 12 to the opening 11, includes a loosely woven section 13 and a densely woven section 14. The dense section 14 has a constricted opening structure to facilitate connection and fixation with medical devices. The loosely woven section 13 has better elasticity, while the densely woven section 14 has less elasticity than the loosely woven section 13, but better tightness, thus allowing it to be more securely fastened to the installation end of the medical device, facilitating the installation of the woven mesh bag 1.

[0030] As shown in Figures 1 and 2, the woven mesh bag 1 is provided with a tightening rope 2 for securing the opening 11. The middle portion of the tightening rope 2 has a serpentine structure and repeatedly weaves through 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, with the inner section 211 and the outer section 212 arranged alternately. The two ends of the tightening rope 2 are free ends 22, and both free ends 22 extend through the side wall of the woven mesh bag 1 to the outside of the woven mesh bag 1. As shown in Figure 3, 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 to close the opening 11, preventing the filling material from flowing out of the opening 11.

[0031] Preferably, the binding rope 2 is located at the junction of the sparse part 13 and the dense part 14.

[0032] As shown in Figures 1 and 3, during use, the volume of the mesh bag increases with the injection of filler, and the mesh openings of the mesh bag can also increase to a certain extent. This allows the bone cement to fully contact the surrounding tissue, which is conducive to the ingrowth of new tissue and achieves rapid fusion.

[0033] Furthermore, as shown in Figures 1 and 3, the woven mesh bag 1 has greater stretchability in the transverse direction than in the longitudinal direction.

[0034] Thus, when the woven mesh bag 1 is in a contracted state, it is elongated and slender, allowing it to pass more easily through narrow surgical channels. Once inside the lesion, the injection of filler material causes the mesh bag to expand rapidly laterally, filling the lesion and ensuring full contact between the filler and surrounding tissue.

[0035] Furthermore, as shown in Figures 4 and 5, the end opposite to the opening 11 is an open structure, and a closed blind end 12 is formed by binding.

[0036] Thus, when the opening 11 of the woven mesh bag 1 is tied tightly by the rope 2, the woven mesh bag 1 has a structure with both ends tied tightly. After the filling material is injected, it will form an approximately spherical structure as shown in Figure 3, which is more conducive to matching the filling cavity formed by the previous expansion orthotics.

[0037] Furthermore, the binding portion 121 of the blind end 12 is located inside the woven mesh bag 1. In this way, after the filling material is injected, the smooth structure of the outer surface of the blind end 12 is more conducive to filling the filling cavity formed by the previously expanded orthotic.

[0038] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0039] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. An implantable expandable mesh bag, characterized by: The woven mesh bag (1) has an opening (11) and a blind end (12) opposite to the opening (11), is flexible and is made by weaving. When the filler is injected, the volume of the woven mesh bag (1) is increased, and the mesh of the woven mesh bag (1) is also increased.

2. An implantable expandable mesh bag according to claim 1, wherein: The woven mesh bag (1) comprises a sparse part (13) and a dense part (14) from the blind end (12) to the opening (11), and the dense part (14) is in a necked structure.

3. An implantable inflatable mesh bag according to claim 2, wherein: The woven mesh bag (1) is provided with a tightening rope (2) for tightening the opening (11).

4. An implantable inflatable mesh bag according to claim 3, wherein: The middle part of the tightening rope (2) reciprocally penetrates the inside and outside of the woven mesh bag (1), and the two free ends (22) of the tightening rope (2) extend to the outside of the woven mesh bag (1) through the side wall of the woven mesh bag (1), and when the two free ends (22) are pulled, the woven mesh bag (1) can be partially tightened.

5. An implantable inflatable mesh bag according to claim 3, wherein: The tightening rope (2) is located at the connection between the sparse part (13) and the dense part (14).

6. An implantable expandable mesh bag according to claim 1, wherein: The transverse flexibility of the woven mesh bag (1) is greater than the longitudinal flexibility.

7. An implantable expandable mesh bag according to claim 1, wherein: The end opposite to the opening (11) is in an open structure, and the blind end (12) is formed by bundling.

8. An implantable inflatable mesh bag according to claim 7, wherein: The bundling part (121) of the blind end (12) is located inside the woven mesh bag (1).

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