Implanted expandable mesh bag suite

Abstract

The utility model provides an implanted expandable mesh bag suite, and relates to the technical field of medical instruments. Comprising a connector and a mesh bag mounted on the connector. The mesh bag is of a pocket-shaped structure and is provided with an opening and a blind end opposite to the opening. The connector comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe each comprise a first connecting end facing one side of the mesh bag and a second connecting end facing one side of the holder, and an annular clamping gap used for tightly squeezing the opening end of the mesh bag is formed between the first connecting end of the inner pipe and the outer pipe. The clamping gap sequentially comprises a first ring section, a transition ring section and a second ring section with the diameter smaller than that of the first ring section in the direction facing the mesh bag, and when the inner pipe moves towards one side of the mesh bag relative to the outer pipe, along with shortening of the transition ring section, the opening end of the mesh bag is tightly squeezed in the clamping gap. And a tightening rope for tightening the opening is arranged on the outer side of the inner pipe on the mesh bag. The implantable expandable mesh bag suite provided by the utility model forms an independent assembly, and is convenient to install and operate in an operation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an implantable expandable mesh bag kit. Background Art

[0002] The current spinal fusion is gradually developing from the original open surgery to minimally invasive surgery. Although the current minimally invasive fusion is much less traumatic than open surgery, due to the size of the fusion device, a larger channel needs to be established during the operation, which is relatively more traumatic than conventional minimally invasive surgery, both to the stability of the spine and to the damage to soft tissue. In addition, most of the fusion devices currently on the market have a small amount of implanted bone tissue, and the area of ​​​​combination between the grafted bone and the original bone tissue is limited, resulting in a low fusion rate and a long recovery time after surgery. Utility Model Content

[0003] In response to the above problems, the present application provides an implantable expandable mesh bag kit which is not only small in size but also can increase the bonding area between the bone graft and the original bone tissue and improve the fusion rate.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An implantable expandable mesh bag kit comprises a connector and a mesh bag mounted on the connector;

[0006] The mesh bag is in a pocket-like structure, having an opening and a blind end opposite to the opening;

[0007] The connector includes an inner tube and an outer tube, each of which includes a first connecting end facing the mesh bag and a second connecting end facing the holder, and a ring-shaped clamping gap for squeezing the opening end of the mesh bag is formed between the first connecting end of the inner tube and the outer tube;

[0008] The clamping gap includes a first ring segment, a transition ring segment and a second ring segment with a diameter smaller than the first ring segment in sequence along the direction toward the mesh bag. When the inner tube moves toward the mesh bag relative to the outer tube, the opening end of the mesh bag is squeezed tightly into the clamping gap as the transition ring segment shortens.

[0009] A tightening rope for tightening the opening is arranged on the outer side of the inner tube of the net bag.

[0010] Furthermore, the second connecting end of the outer tube is provided with a first connecting thread matched with the outer sleeve of the holder, and the second connecting end of the inner tube is provided with a second connecting thread matched with the disassembly tool.

[0011] Furthermore, the inner tube also includes a middle section, a second axial shoulder is formed between the second connecting end of the inner tube and the middle section, the first connecting thread is an internal thread, and the mounting end of the outer sleeve includes a connecting section and a pushing section in sequence along the direction toward the connecting head, and when the outer tube is connected to the connecting section, the pushing section is inserted into the gap between the inner tube and the outer tube and rests on the second axial shoulder.

[0012] Furthermore, the inner tube only has the freedom to slide axially relative to the outer tube.

[0013] Furthermore, the mesh bag is made by weaving and is retractable. When a filler is injected, the volume of the mesh bag increases, and the mesh holes of the mesh bag also increase accordingly.

[0014] Furthermore, the 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.

[0015] Furthermore, the stretchability of the mesh bag in the transverse direction is greater than that in the longitudinal direction.

[0016] Furthermore, the middle portion of the tightening rope is reciprocatedly inserted into the inner and outer sides of the mesh bag, and the two free ends of the tightening rope pass through the side walls of the mesh bag and extend to the outside of the mesh bag. When the two free ends are pulled, the mesh bag can be partially tightened.

[0017] Furthermore, the end opposite to the opening is in an open structure, and a blind end is formed by bundling.

[0018] Furthermore, the binding portion of the blind end is located inside the mesh bag.

[0019] The beneficial effects of the utility model are:

[0020] An implantable expandable mesh bag kit provided in an embodiment of the present application installs the mesh bag on a connecting head to form a separate filling component. The overall volume is small and can be easily passed through a narrow surgical channel. Compared with traditional fusion devices, since there is no need to establish a larger surgical channel, it can reduce damage to the stability of the spine and soft tissue.

[0021] In addition, the implantable expandable mesh bag kit provided in the embodiment of the present application uses a mesh bag to implant bone tissue, which effectively increases the implanted amount of bone tissue compared to traditional fusion devices, increases the bonding area between the grafted bone and the original bone tissue, improves the postoperative fusion rate, and shortens the recovery time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an implantable expandable mesh bag kit provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0024] Figure 3 A schematic diagram of the structure of the clamping gap formed by the inner tube and the outer tube;

[0025] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part B;

[0026] Figure 5 A schematic diagram of the structure of an implantable expandable mesh bag kit connected to a holder provided in an embodiment of the present application;

[0027] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the middle C part;

[0028] Figure 7 An exploded view of an implantable expandable mesh bag kit connected to a holder provided in an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of the structure of a mesh bag in a contracted state;

[0030] Fig. 9 It is a schematic diagram of the tying structure of the mesh bag;

[0031] Fig.10 is a schematic diagram of the structure of a mesh bag in an expanded state;

[0032] Fig.11 Schematic diagram of the blind end structure of the mesh bag;

[0033] Fig.12 for Fig.11 Schematic diagram of the enlarged structure of part D.

[0034] In the figure: 1, connector; 11, inner tube; 1111, first shaft section; 1112, second shaft section; 1113, first step surface; 112, second connecting thread; 113, middle section; 114, first shaft shoulder; 115, second shaft shoulder; 12, outer tube; 1211, first hole section; 1212, second hole section; 1213, second step surface; 122, first connecting thread; 13, clamping gap; 131, first ring section; 132, transition ring section; 133, second ring section;

[0035] 2. Mesh bag; 21. Opening; 22. Blind end; 221. Bundling part; 23. Sparse part; 24. Dense part;

[0036] 3. Tie the rope tightly; 311. Inner section; 312. Outer section; 32. Free end;

[0037] 4. outer sleeve; 41. connecting section; 42. pushing section. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figure 1 As shown, an implantable expandable mesh bag kit includes a connector 1 and a mesh bag 2 installed on the connector 1 .

[0040] like Figure 6 As shown, the net bag 2 is a pocket-shaped structure having an opening 21 and a blind end 22 opposite to the opening 21 .

[0041] like Figure 1 As shown, the connector 1 includes an inner tube 11 and an outer tube 12 sleeved outside the inner tube 11, the inner tube 11 can slide axially relative to the outer tube 12, and the inner tube 11 and the outer tube 12 are coaxially arranged. The inner tube 11 and the outer tube 12 each include a first connection end facing the side of the net bag 2 and a second connection end facing the side of the holder.

[0042] like Figure 1 and Figure 2 As shown, the end of the mesh bag 2 provided with the opening 21 is the opening 21 end. The opening 21 end of the mesh bag 2 is inserted into the connector 1, and the opening 21 end of the mesh bag 2 is clamped between the tube and the outer tube 12, and an annular clamping gap 13 is formed between the first connecting end of the inner tube 11 and the outer tube 12 for squeezing the opening 21 end of the mesh bag 2.

[0043] like Figure 3 and Figure 4 As shown, the clamping gap 13 includes a first ring segment 131, a transition ring segment 132 (i.e. Figure 3 The first ring segment 131 has a diameter greater than that of the second ring segment 133, and the transition ring segment 132 is used to transitionally connect the first ring segment 131 and the second ring segment 133. The opening 21 of the mesh bag 2 extends to the first ring segment 131, and when the inner tube 11 moves toward the side of the mesh bag 2 relative to the outer tube 12, the opening 21 of the mesh bag 2 is squeezed into the clamping gap 13 as the transition ring segment 132 shortens.

[0044] As a specific implementation, the outer side surface of the first connecting end of the inner tube 11 in this embodiment is a stepped shaft structure, which includes a first shaft section 1111 and a second shaft section 1112 in the direction toward the mesh bag 2, the diameter of the first shaft section 1111 is greater than the diameter of the second shaft section 1112, and a first step surface 1113 is formed between the first shaft section 1111 and the second shaft section 1112. The inner hole of the first connecting end of the outer tube 12 is a stepped hole, which includes a first hole section 1211 and a second hole section 1212 in the direction toward the mesh bag 2, the diameter of the first hole section 1211 is greater than the diameter of the second hole section 1212, and a second step surface 1213 is formed between the first hole section 1211 and the second hole section 1212. The first step surface 1113 and the second step surface 1213 can be a plane perpendicular to the axis, a conical surface or an arc surface. Exemplarily, the first step surface 1113 and the second step surface 1213 in this embodiment are both conical surfaces.

[0045] A tightening rope 3 for tightening the opening 21 is provided on the mesh bag 2 on the outer side of the inner tube 11 .

[0046] like Figure 5 and Figure 6 As shown, the second connecting end of the outer tube 12 is provided with a first connecting thread 122 that cooperates with the outer sleeve 4 of the holder, and the second connecting end of the inner tube 11 is provided with a second connecting thread 112, and the second connecting thread 112 can cooperate with the disassembly tool.

[0047] When in use, first connect the outer tube 12 of the connector 1 to the outer sleeve 4 of the holder (at this time, the mesh bag 2 has been squeezed and installed on the first connection end of the connector 1), and then the filling assembly with the mesh bag 2 can be inserted into the patient's body through the holder to fill the filler. After the filling of the filler is completed and the tightening rope 3 is tied, remove the holder, connect the disassembly tool to the second connection end of the inner tube 11, and pull the inner tube 11 backward to move the inner tube 11 away from the mesh bag 2 relative to the outer tube 12, so that the mesh bag 2 is separated from the first connection end of the connector 1. At this time, the connector 1 is separated from the mesh bag 2, and the connector 1 can be taken out as a whole using the disassembly tool.

[0048] As a specific implementation, the second connecting thread 112 arranged on the second connecting end of the inner tube 11 in this embodiment is an external thread, and accordingly, the end of the disassembly tool is provided with an internal thread matching the external thread on the second connecting end of the inner tube 11.

[0049] As a specific implementation, the first connecting thread 122 described in this embodiment is an internal thread, and the outer sleeve 4 of the holder is provided with an external thread that matches the first connecting thread 122 .

[0050] Furthermore, the inner tube 11 further includes a middle section 113 between the first connection end and the second connection end, and the maximum outer diameters of the first connection end and the second connection end of the inner tube 11 are both smaller than the outer diameter of the middle section 113. A first shoulder 114 is formed between the first connection end of the inner tube 11 and the middle section 113, and a second shoulder 115 is formed between the second connection end of the inner tube 11 and the middle section 113.

[0051] Furthermore, if Figure 5 , Figure 6 and Figure 7 As shown, the outer side surface of the mounting end of the outer sleeve 4 of the holder is in the shape of a stepped shaft, and includes a connecting section 41 and a push-up section 42 in sequence along the direction toward the connector 1, and the outer diameter of the connecting section 41 is larger than the outer diameter of the push-up section 42. An outer thread matching the first connecting thread 122 is provided on the connecting section 41, and when the outer tube 12 is connected to the connecting section 41, the push-up section 42 is inserted into the gap between the inner tube 11 and the outer tube 12, and abuts against the second shaft shoulder 115.

[0052] The reason for such design is that, during operation, the mesh bag 2 is not only fixed by the squeezing force between the inner tube 11 and the outer tube 12, but the pushing and limiting of the outer sleeve 4 of the holder can prevent the inner tube 11 from moving relative to the outer tube 12 to the side away from the mesh bag 2, thereby preventing the mesh bag 2 from slipping off the connector 1 during the operation.

[0053] Furthermore, the outer diameter of the middle section 113 of the inner tube 11 matches that of the outer tube 12 , that is, the inner tube 11 only has the freedom to slide axially relative to the outer tube 12 .

[0054] The reason for such a design is that if the outer diameter of the middle section 113 is smaller than the inner diameter of the outer tube 12, the inner tube 11 not only has a free end 32 that slides axially relative to the outer tube 12, but can also swing relative to the outer tube 12 within a certain angle range. This is not conducive to the locking and fixing of the net bag 2. During use, as the inner tube 11 and the outer tube 12 move relative to each other, the net bag 2 is easy to slip off.

[0055] Furthermore, the mesh bag 2 currently used to fill bone cement is relatively soft but not elastic. In addition, since the mesh bag 2 needs to enter the body through the channel established before the minimally invasive surgery during the operation, in order to reduce damage, the established surgical channel is often very small. When the mesh bag 2 is inserted, in order to allow the mesh bag 2 to smoothly enter the lesion through the surgical channel, the mesh bag 2 needs to be folded and contracted first, and then the mesh bag 2 is placed at the lesion through surgical instruments. In this way, although the mesh bag 2 can smoothly enter the lesion through the surgical channel, the mesh bag 2 inserted into the lesion is still in a folded state. During the operation, the folded mesh bag 2 needs to be opened by the filling expansion force of the bone cement, and there is often a problem of insufficient opening. If the mesh bag 2 is fully opened, it is impossible to ensure that the bone cement is in good contact with the surrounding tissues, and the expected therapeutic effect cannot be achieved.

[0056] For this reason, Figure 8 As shown, the mesh bag 2 is made by weaving textile threads and is retractable. The woven mesh bag 2 includes a loosely woven sparse part 23 and a densely woven dense part 24 from the blind end 22 to the opening 21, and the dense part 24 is a constricted structure to facilitate connection and fixation with the medical device. The sparse part 23 has better retractability due to its loose weaving, and the dense part 24 has less retractability than the sparse part 23 due to its 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 2.

[0057] like Figure 8 and Fig. 9 As shown, the middle part of the tightening rope 3 is in a serpentine structure and is interlaced between the inner and outer sides of the woven mesh bag 2. That is, the middle part of the tightening rope 3 includes an inner section 311 located inside the woven mesh bag 2 and an outer section 312 located outside the woven mesh bag 2, and the inner section 311 and the outer section 312 are arranged at intervals. The two ends of the tightening rope 3 are free ends 32, and both of the free ends 32 pass through the side wall of the woven mesh bag 2 and extend to the outside of the woven mesh bag 2. Fig.10 As shown, when in use, the woven mesh bag 2 can be partially tightened by pulling the two free ends 32, and then the tightening rope 3 can be tied by knotting to close and tighten the opening 21 to prevent the filling from flowing out of the opening 21.

[0058] Preferably, the tightening rope 3 is located at the connection between the sparse portion 23 and the dense portion 24 .

[0059] like Figure 8 and Fig.10 As shown, when used, as the filler is injected, the volume of the mesh bag 2 becomes larger, and the mesh of the mesh bag 2 can be enlarged to a certain extent. In this way, the bone cement can fully contact the surrounding tissue, which is conducive to the growth of new tissue to achieve the purpose of rapid fusion.

[0060] For the convenience of description, the direction of the line connecting the opening 21 and the blind end 22 is defined as the longitudinal direction, and the direction perpendicular to the longitudinal direction is defined as the transverse direction.

[0061] Furthermore, if Figure 8 and Fig.10 As shown, the woven mesh bag 2 has a greater elasticity in the transverse direction than in the longitudinal direction.

[0062] Thus, when the woven mesh bag 2 is in a contracted state, the woven mesh bag 2 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 2 can be rapidly expanded laterally by injecting fillers, thereby filling the lesion site and making the fillers fully contact with the surrounding tissues.

[0063] Furthermore, if Fig.11 and Fig.12 As shown, the end opposite to the opening 21 is in an open structure, and a closed blind end 22 is formed by bundling.

[0064] In this way, when the opening 21 of the woven mesh bag 2 is tied by the tying rope 3, the woven mesh bag 2 as a whole has a structure with two ends tied tightly, and after the filling is injected, it will form a structure as shown in FIG. Fig.10 The nearly spherical structure shown is more conducive to matching the filling cavity formed by the previous expansion orthosis.

[0065] Furthermore, the binding portion 221 of the blind end 22 is located inside the woven mesh bag 2. In this way, after the filler is injected, the outer portion of the blind end 22 presents a smooth structure, which is more conducive to filling the filling cavity formed by the early expansion orthosis.

[0066] 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.

[0067] 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 implantable expandable mesh bag kit, characterized in that: It comprises a connecting head (1) and a mesh bag (2) installed on the connecting head (1); The mesh bag (2) is in a pocket-like structure, having an opening (21) and a blind end (22) opposite to the opening (21); The connector (1) comprises an inner tube (11) and an outer tube (12), each of the inner tube (11) and the outer tube (12) comprising a first connecting end facing the side of the mesh bag (2) and a second connecting end facing the side of the holder, and an annular clamping gap (13) for squeezing the opening (21) end of the mesh bag (2) is formed between the first connecting end of the inner tube (11) and the outer tube (12); The clamping gap (13) includes, in sequence along the direction toward the mesh bag (2), a first ring segment (131), a transition ring segment (132), and a second ring segment (133) having a diameter smaller than the first ring segment (131); when the inner tube (11) moves toward the side of the mesh bag (2) relative to the outer tube (12), as the transition ring segment (132) shortens, the opening (21) end of the mesh bag (2) is squeezed tightly into the clamping gap (13); A tightening rope (3) for tightening the opening (21) is provided on the mesh bag (2) on the outside of the inner tube (11).

2. The implantable expandable mesh bag kit according to claim 1, characterized in that: The second connection end of the outer tube (12) is provided with a first connection thread (122) matching with the outer sleeve (4) of the holder, and the second connection end of the inner tube (11) is provided with a second connection thread (112) matching with the disassembly tool.

3. The implantable expandable mesh bag kit according to claim 2, characterized in that: The inner tube (11) further comprises an intermediate section (113), a second axial shoulder (115) is formed between the second connecting end of the inner tube (11) and the intermediate section (113), the first connecting thread (122) is an internal thread, the mounting end of the outer sleeve (4) comprises a connecting section (41) and a pushing section (42) in sequence along the direction toward the connector (1), and when the outer tube (12) is connected to the connecting section (41), the pushing section (42) is inserted into the gap between the inner tube (11) and the outer tube (12), and rests against the second axial shoulder (115).

4. The implantable expandable mesh bag kit according to claim 1, characterized in that: The inner tube (11) has only the freedom to slide axially relative to the outer tube (12).

5. The implantable expandable mesh bag kit according to claim 1, characterized in that: The mesh bag (2) is made by weaving and is retractable. When a filler is injected, the volume of the mesh bag (2) increases, and the mesh holes of the mesh bag (2) also increase accordingly.

6. The implantable expandable mesh bag kit according to claim 5, characterized in that: The mesh bag (2) comprises a sparse portion (23) and a dense portion (24) from the blind end (22) to the opening (21), and the dense portion (24) is a shrinking structure.

7. The implantable expandable mesh bag kit according to claim 5, characterized in that: The elasticity of the mesh bag (2) in the transverse direction is greater than that in the longitudinal direction.

8. The implantable expandable mesh bag kit according to claim 1, characterized in that: The middle portion of the tightening rope (3) is reciprocatedly inserted between the inner and outer sides of the mesh bag (2), and the two free ends (32) of the tightening rope (3) both pass through the side walls of the mesh bag (2) and extend to the outside of the mesh bag (2). When the two free ends (32) are pulled, the mesh bag (2) can be partially tightened.

9. The implantable expandable mesh bag kit according to claim 1, characterized in that: The end opposite to the opening (21) is in an open structure, and a blind end (22) is formed by bundling.

10. The implantable expandable mesh bag kit according to claim 9, characterized in that: The bundling portion (221) of the blind end (22) is located inside the mesh bag (2).

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