Directional filling assembly for bone filler

Abstract

The utility model provides a bone filler directional filling assembly, and relates to the technical field of medical instruments. The bone filler directional filling assembly comprises an injector and a mesh bag arranged at the inner end of the injector. The mesh bag is provided with an injection window, and when the bone filler is injected, the bone filler is dispersed outwards through the injection window. And the outer end part of the injector is provided with a mark for indicating the orientation of the injection window. In the working process, the mark is located outside the human body, and an operator can judge the orientation of the injection window on the net bag through the mark. According to the bone filler directional filling assembly, directional filling of the bone filler can be achieved, and therefore the medical seeking requirement of a patient suffering from vertebral body part collapse is met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bone filler directional filling component. Background Art

[0002] Vertebroplasty has been widely used in the clinical treatment of osteoporotic vertebral compression fractures, achieving excellent results. The bone filler, after injection, provides sufficient support between the trabeculae within the vertebral body, thereby ensuring that the injured vertebral body returns to its original height.

[0003] Currently, most bone filler devices are only capable of global filling. That is, when bone filler is injected into a mesh bag, the viscous bone filler diffuses from the perimeter of the bag outward. However, some patients with clinically defined vertebral collapse fractures experience partial collapse, requiring bone filler to be injected into one side of the vertebral body. Current bone filler devices are unable to meet the needs of patients who require targeted bone filler injection. Utility Model Content

[0004] In response to the above problems, the present application provides a bone filler directional filling component that can achieve directional filling of bone fillers, thereby meeting the medical needs of patients with partial vertebral collapse.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A bone filler directional filling assembly comprises an injector and a mesh bag arranged at the inner end of the injector;

[0007] The mesh bag is provided with an injection window, and when the bone filler is injected, the bone filler diffuses outward through the injection window;

[0008] The outer end of the injector is provided with a mark for indicating the direction of the injection window.

[0009] Furthermore, the injector comprises an injection tube and an inner conduit which are coaxially sleeved, and the open end of the mesh bag is squeezed and fixed between the inner conduit and the injection tube.

[0010] Furthermore, the outer end of the injection tube is provided with a first handle, and the outer end of the inner conduit is provided with a second handle.

[0011] Furthermore, the logo is set on the first handle or the second handle.

[0012] Furthermore, the first handle and the second handle are connected via a threaded structure.

[0013] Furthermore, the rotation axis of the threaded structure is coaxial with the inner conduit and the injection tube.

[0014] Furthermore, the second handle is provided with a Luer connector for connecting to a high-pressure injection device, and the Luer connector is communicated with the inner catheter.

[0015] Furthermore, the injection tube includes a first main body and a first closing portion in sequence from the outside to the inside, and the inner diameter of the first closing portion is smaller than the inner diameter of the first main body, and the inner side surface of the injection tube forms a first bending portion between the first closing portion and the first main body, and the inner conduit includes a second main body and a second closing portion in sequence from the outside to the inside, and the outer diameter of the second closing portion is smaller than the outer diameter of the second main body, and the outer side surface of the inner conduit forms a second bending portion between the second closing portion and the second main body, and the open end of the mesh bag is squeezed between the first bending portion and the second bending portion.

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

[0017] A bone filler directional filling assembly provided in an embodiment of the present application achieves directional filling of the bone filler by setting an injection window on the mesh bag and setting an indicator for indicating the direction of the injection window on the outer end of the injector. That is, when filling the bone filler, a specific direction can be selected according to the collapse position to inject the bone filler, thereby meeting the medical needs of patients with partial vertebral collapse.

[0018] In addition, since the injection window is facing the collapsed part of the vertebral body and the mesh holes in the rest of the mesh bag are small and not prone to leakage, after the filling is completed, the mesh bag can also play a sealing role, thereby reducing the risk of bone filler leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A top view of a bone filler directional filling assembly provided in Example 1 of the present application;

[0020] Figure 2 This is a front view of a bone filler directional filling assembly provided in Example 1 of the present application;

[0021] Figure 3 A cross-sectional view of a bone filler directional filling assembly provided in Example 1 of the present application;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A;

[0023] Figure 5 is a partial cross-sectional view of the injection pipe;

[0024] Figure 6 is a partial cross-sectional view of the inner catheter;

[0025] Figure 7A front view of a mesh bag of a bone filler directional filling assembly provided in Example 2 of the present application;

[0026] Figure 8 A top view of a mesh bag of a bone filler directional filling assembly provided in Example 2 of the present application;

[0027] Figure 9 A top view of a mesh bag of a bone filler directional filling assembly provided in Example 3 of the present application;

[0028] Figure 10 This is a cross-sectional view of the inner end of an injector of a bone filler directional filling assembly provided in Example 4 of the present application.

[0029] In the figure: 1. Injector; 111. Injection tube; 1111. First main body; 1112. First closing portion; 1113. First bending portion; 112. First handle; 1121. First mounting hole; 1122. Mounting boss; 121. Inner catheter; 1211. Second main body; 1212. Second closing portion; 1213. Second bending portion; 122. Second handle; 1221. Second mounting hole; 1222. Luer connector; 1223. Label.

[0030] 2. Mesh bag; 21. Injection window. DETAILED DESCRIPTION

[0031] In order 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 in conjunction with the drawings in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of this application should fall within the scope of protection of this application.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, a bone filler directional filling assembly includes an injector 1 and a mesh bag 2 disposed at the inner end of the injector 1 (the end inserted into the human body during operation is the inner end). The mesh bag 2 is provided with an injection window 21. When the bone filler is injected, the bone filler diffuses outward through the injection window 21. The outer end of the injector 1 (the end opposite to the inner end is the outer end) is provided with a mark 1223 for indicating the direction of the injection window 21. During operation, the mark 1223 is located outside the human body, and the operator can determine the direction of the injection window 21 on the mesh bag 2 by the mark 1223.

[0034] The directional bone filler filling assembly has a simple structure and is easy to operate. By adjusting the direction of the injection window 21, the injection and diffusion direction of the bone filler in the vertebral body can be controlled, which makes it easier for patients who need directional injection of bone filler to restore the height of the injured vertebral body as soon as possible. The rest of the mesh bag 2 can reduce the leakage of bone filler and reduce the risk of bone filler leakage.

[0035] Here, the mesh bag 2 can be any type of mesh bag 2.

[0036] If a hole-type structure is adopted, that is, the mesh bag 2 includes a main body with holes provided on the main body, the aperture of the injection window 21 is larger than the apertures of other parts of the mesh bag 2 to ensure that the bone filler diffuses outward from the injection window 21 and enters the human body, while the bone filler cannot diffuse outward in other parts and can only serve as a channel for the bone filler to pass through.

[0037] If the mesh bag 2 adopts a woven structure, the injection window 21 is sparsely woven with large mesh holes, while the other parts of the mesh bag 2 are densely woven with small mesh holes. This also ensures that the bone filler diffuses outward from the injection window 21 and enters the human body, while the bone filler cannot diffuse outward in the other parts and can only serve as a channel for the bone filler to pass through.

[0038] As a specific implementation, the injection window 21 described in this embodiment is located in the middle of the mesh bag 2 and has a square structure. Exemplarily, the injection window 21 surrounds the mesh bag 2 half a circle.

[0039] like Figure 3 and Figure 4 As shown, the injector 1 includes an injection tube 111 and an inner conduit 121 which are coaxially sleeved, and the open end of the mesh bag 2 is squeezed and fixed between the inner conduit 121 and the injection tube 111.

[0040] The injection tube 111 includes a first main body 1111 and a first closing portion 1112 from the outside to the inside (the end inserted into the human body during operation is the inner end), and the inner diameter of the first closing portion 1112 is smaller than the inner diameter of the first main body 1111. The inner surface of the injection tube 111 forms a first bending portion 1113 between the first closing portion 1112 and the first main body 1111.

[0041] The inner conduit 121 includes, from the outside to the inside (with the end inserted into the human body during operation as the inner end), a second main body portion 1211 and a second closing portion 1212, wherein the outer diameter of the second closing portion 1212 is smaller than the outer diameter of the second main body portion 1211. A second bend portion 1213 is formed on the outer side of the inner conduit 121 between the second closing portion 1212 and the second main body portion 1211. The second bend portion 1213 is located outside the first bend portion 1113 (with the end inserted into the human body during operation as the inner end), and the width of the annular gap formed between the inner side of the first closing portion 1112 and the outer side of the second main body portion 1211 is smaller than the thickness of the mesh bag 2. During use, by pushing the inner catheter 121 inward, the inner catheter 121 moves inward relative to the injection tube 111, and the opening of the mesh bag 2 can be squeezed between the first bending portion 1113 and the second bending portion 1213, thereby locking and fixing the mesh bag 2; by pulling the inner catheter 121 outward, the inner catheter 121 moves outward relative to the injection tube 111, and the mesh bag 2 can be loosened.

[0042] like Figure 5 As shown, the outer end of the injection tube 111 is provided with a first handle 112. The first handle 112 is provided with a first mounting hole 1121, and the outer end of the injection tube 111 is inserted into the first mounting hole 1121 and fixedly connected to the first handle 112.

[0043] like Figure 6 As shown, a second handle 122 is provided at the outer end of the inner tube 121. The second handle 122 is provided with a second mounting hole 1221. The outer end of the inner tube 121 is inserted into the second mounting hole 1221 and fixedly connected to the second handle 122. The second handle 122 is provided with a Luer connector 1222 for connecting to a high-pressure injection device, and the Luer connector 1222 is in communication with the second mounting hole 1221.

[0044] The logo 1223 is provided on the first handle 112 or the second handle 122. As a specific implementation, the logo 1223 in this embodiment is provided on the second handle 122.

[0045] Furthermore, in order to achieve reliable squeezing of the mesh bag 2 , the first handle 112 and the second handle 122 are connected via a threaded structure, and the rotation axis of the threaded structure is coaxial with the inner conduit 121 and the injection tube 111 .

[0046] As a specific implementation method, Figure 3 、 Figure 5 and Figure 6As shown, in this embodiment, a mounting boss 1122 is provided on the end of the first handle 112 facing the second handle 122, coaxially arranged with the first mounting hole 1121. The outer cylindrical surface of the mounting boss 1122 is provided with external threads. The second mounting hole 1221 includes a first hole segment and a second hole segment, sequentially extending away from the first handle 112. The diameter of the first hole segment is larger than that of the second hole segment. The outer end of the inner conduit 121 is fixedly connected to the second hole segment. The cylindrical side surface of the first hole segment is provided with internal threads that mate with the external threads of the mounting boss 1122.

[0047] Example 2

[0048] like Figure 7 and Figure 8 As shown, the injection window 21 is located at the front end of the mesh bag 2 and surrounds the mesh bag 2 half a circle. The rest of the structure is the same as that of the first embodiment.

[0049] Example 3

[0050] like Figure 9 As shown, the injection window 21 is located in the middle of the mesh bag 2 and has a circular or elliptical structure. The rest of the structure is the same as that of the first embodiment.

[0051] Example 4

[0052] The outer side surface of the injection pipe 111 is a complete cylindrical surface, and the inner side surface of the inner conduit 121 is a complete cylindrical surface. The rest of the structure is the same as that of the first embodiment.

[0053] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments provided in this application do not exceed the scope of protection of this application.

[0054] The above specific implementation methods provide a detailed description of the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above is only a specific implementation method of the embodiments of the present application and is not intended to limit the scope of protection of the embodiments of the present application. That is, any modifications, equivalent replacements, improvements, etc. made on the basis of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A bone filler directional filling assembly, characterized by: It comprises an injector (1) and a mesh bag (2) arranged at the inner end of the injector (1); The mesh bag (2) is provided with an injection window (21), and when the bone filler is injected, the bone filler diffuses outward through the injection window (21); The outer end of the injector (1) is provided with a mark (1223) for indicating the direction of the injection window (21).

2. The bone filler directional filling assembly according to claim 1, characterized in that: The injector (1) comprises an injection tube (111) and an inner conduit (121) which are coaxially sleeved, and the open end of the mesh bag (2) is squeezed and fixed between the inner conduit (121) and the injection tube (111).

3. The bone filler directional filling assembly according to claim 2, characterized in that: The outer end of the injection tube (111) is provided with a first handle (112), and the outer end of the inner conduit (121) is provided with a second handle (122).

4. The bone filler directional filling assembly according to claim 3, characterized in that: The logo (1223) is provided on the first handle (112) or the second handle (122).

5. The bone filler directional filling assembly according to claim 3, characterized in that: The first handle (112) and the second handle (122) are connected via a threaded structure.

6. The bone filler directional filling assembly according to claim 5, characterized in that: The rotation axis of the threaded structure is coaxial with the inner conduit (121) and the injection pipe (111).

7. The bone filler directional filling assembly according to claim 3, characterized in that: The second handle (122) is provided with a Luer connector (1222) for connecting to a high-pressure injection device, and the Luer connector (1222) is in communication with the inner catheter (121).

8. The bone filler directional filling assembly according to claim 2, characterized in that: The injection tube (111) includes, from outside to inside, a first main body (1111) and a first closing portion (1112), and the inner diameter of the first closing portion (1112) is smaller than the inner diameter of the first main body (1111). The inner side surface of the injection tube (111) forms a first bending portion (1113) between the first closing portion (1112) and the first main body (1111). The inner conduit (121) includes, from outside to inside, a second main body (1211) and a second closing portion (1212), and the outer diameter of the second closing portion (1212) is smaller than the outer diameter of the second main body (1211). The outer side surface of the inner conduit (121) forms a second bending portion (1213) between the second closing portion (1212) and the second main body (1211). The open end of the mesh bag (2) is squeezed between the first bending portion (1113) and the second bending portion (1213).

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