Matching structure of strip line memory alloy support
Through the matching structure of the wire-mounted memory alloy stent, self-expanding characteristics and bone cement fixation are used to solve the problem of anchor nails falling off in patients with poor bone quality, achieving stable tendon/ligament repair effect, and reducing the impact on the tissue in the body.
Patent Information
- Application Number
- CN202422086560.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the prior art, patients with poor bone quality tend to fall off during ligament/tendon repair surgery, resulting in failure of repair.
The wire-based memory alloy stent fitting structure is adopted, including implantation tools and memory alloy stents. The self-expanding characteristics of the memory alloy stent are used to form a stable structure in the bone and fixed with bone cement. The single blade of the stent is closely connected with bone cement, and the fixing effect is strengthened using a braided mesh bag.
Effectively prevent anchors from being disengaged, provide stable tendon/ligament fixation, degrading materials to reduce in vivo effects, and facilitate subsequent treatment and examination.
Smart Images
Figure CN223183601U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of surgical instruments, in particular to a matching structure of a memory alloy bracket with a wire. Background Art
[0002] Wire anchors are currently commonly used in orthopedic ligament / tendon repair surgeries. This method involves first creating a hole in the bone surface, then implanting the anchor. The sutures attached to the anchor are then used to secure the tendon / ligament by pressing or weaving. However, postoperatively, due to poor bone quality in some older patients or those with osteoporosis, the anchor can be easily pulled out, leading to ligament / tendon repair failure. Utility Model Content
[0003] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a matching structure of a memory alloy bracket with a wire, which solves the problem that the anchor pins are easy to fall off in patients with poor bone quality.
[0004] Technical Solution
[0005] In order to solve the above problems, the technical solution provided by the present invention is as follows:
[0006] A matching structure of a wired memory alloy bracket comprises an implantation tool and a memory alloy bracket, wherein the memory alloy bracket is detachably mounted on the implantation tool.
[0007] The memory alloy stent consists of an anchor body and a plurality of stent single blades, wherein the plurality of stent single blades are arranged around the end of the anchor body, and the stent single blades can expand by themselves when not constrained.
[0008] Furthermore, the implantation tool is composed of a hollow implant tube and an outer sleeve, wherein the outer sleeve is sleeved on the hollow implant tube and slides on the hollow implant tube.
[0009] Furthermore, the memory alloy bracket is installed at the end of the hollow implant tube, and the anchor body is communicated with the hollow implant tube.
[0010] Furthermore, when the outer sleeve is located at one side of the anchor body, the outer sleeve constrains a plurality of the single blades of the stent, and the plurality of single blades of the stent are bound by the outer sleeve and fit around the anchor body.
[0011] Furthermore, several of the single blades on the memory alloy bracket are in a multi-branched shape, and the ends of the branches of the single blade are regular small spherical protrusions.
[0012] Furthermore, a winding post structure is provided at the end of the memory alloy bracket, and the winding post structure is connected with a suture.
[0013] Furthermore, the invention further comprises a selectively used woven mesh bag, which is sleeved on the memory alloy bracket.
[0014] Furthermore, the woven mesh bag is woven from yarns of ultra-high molecular weight polyethylene material or absorbable material.
[0015] Furthermore, the hollow implant tube of the implant tool is connected with a bone cement injector.
[0016] Furthermore, the bone cement and the memory alloy stent are made of degradable materials.
[0017] Beneficial effects
[0018] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:
[0019] The technical solution provided by the present invention is to use an implant tool and a memory alloy bracket in combination. By using a principle similar to that of steel bars and concrete in the construction field to make the building stronger, the memory alloy bracket is fixed in the space inside the bone and bone cement is filled in the space to form a stable and firm structure. The sutures are used to fix the injured tendon / ligament so that the anchor will not fall out. At the same time, a woven mesh bag can be used to further strengthen the overall structure. Degradable materials can also be used to reduce the impact on the body's tissues and facilitate subsequent treatment and examination. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the implantation tool 10 and the memory alloy stent 20 in an unused state according to Example 1 of the present invention;
[0021] Figure 2 Schematic diagram of the use state of the implantation tool 10 and the memory alloy stent 20 of Example 1 of the present utility model;
[0022] Figure 3 Schematic diagram of the implantation tool 10 in an unused state according to Example 1 of the present invention;
[0023] Figure 4 Schematic diagram of the implantation tool 10 in use according to Example 1 of the present invention;
[0024] Figure 5 This is a schematic structural diagram of the hollow implant tube 11 according to Example 1 of the present utility model;
[0025] Figure 6 This is a schematic structural diagram of the outer sleeve 12 of Example 1 of the present utility model;
[0026] Figure 7 This is a schematic structural diagram of the memory alloy bracket 20 according to Example 1 of the present utility model;
[0027] Figure 8 This is a schematic diagram of the contraction of a single blade 22 of the bracket of Example 1 of the present utility model;
[0028] Figure 9 This is a schematic structural diagram of the anchor body 21 of Example 1 of the present utility model;
[0029] Figure 10 This is an overall plan view of a single blade 22 of the bracket of Example 1 of the present utility model;
[0030] Figure 11 This is a schematic diagram of the memory alloy bracket 20 in use according to Example 1 of the present utility model;
[0031] Figure 12 This is a flowchart of the use of Example 1 of the utility model;
[0032] Figure 13 This is a schematic diagram of the structure of Example 1 of the utility model after use. DETAILED DESCRIPTION
[0033] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0034] Example 1
[0035] Combined with attachment Figure 1-13 , a matching structure of a wire-shaped memory alloy bracket can be used in conjunction with bone cement to achieve the effect of strengthening the bone at the implant site in the bone, thereby achieving better therapeutic effects in tendon or ligament repair surgery.
[0036] It consists of an implantation tool 10 and a memory alloy bracket 20. The implantation tool 10 is used to install the memory alloy bracket 20 at the position of the bone that needs to be reinforced. During the installation process, the memory alloy bracket 20 is fixedly installed on one end of the implantation tool 10. The implantation tool 10 carries the memory alloy bracket 20 and is inserted into the bone. After completing the installation of the memory alloy bracket 20, the implantation tool 10 can be separated from the memory alloy bracket 20, thereby leaving the memory alloy bracket 20 in the bone, which is convenient for cooperating with the operation procedures of subsequent repair surgery.
[0037] The implantation tool 10 is composed of a hollow implant tube 11 and an outer sleeve 12. The hollow implant tube 11 is preferably composed of two parts, namely, a pipe part 111 and a handle part 112. The pipe part 111 is located in the handle part 112 and passes through the handle part 112. The outer sleeve 12 slides on the pipe part 111 of the hollow implant tube 11. The outer sleeve 12 is preferably composed of two parts, namely, a limiting sleeve 121 and a pushing sleeve 122. The limiting sleeve 121 is located on the side of the handle part 112 away from the hollow implant tube 11.
[0038] The memory alloy bracket 20 is installed at the end of one side of the pipe part 111 of the hollow implant tube 11, and the limiting sleeve 121 of the outer sleeve 12 is used to limit the memory alloy bracket 20. After the memory alloy bracket 20 is installed at the end of the pipe part 111, the limiting sleeve 121 of the outer sleeve 12 is sleeved on the outside of the memory alloy bracket 20. Since the memory alloy bracket 20 has the function of self-expansion, when it is not inserted into the bone, the limiting sleeve 121 is sleeved on the memory alloy bracket 20 to keep it in a contracted state.
[0039] The sizes of the handle portion 112 and the push sleeve 122 can be set to be larger than the sizes of the pipeline portion 111 and the limiting sleeve 121, so as to facilitate operation by medical staff.
[0040] The memory alloy stent 20 consists of an anchor body 21 and a plurality of stent single blades 22. The plurality of stent single blades 22 are arranged around the anchor body 21 in a petal-like form to form a memory alloy stent. The stent single blades 22 are in an expanded state when not constrained. When the memory alloy stent 20 is installed on the implantation tool 10, the stent single blades 22 are held inside by the limiting sleeve 121, thereby limiting the stent single blades 22 so that the stent single blades 22 remain in a contracted state and fit on the anchor body 21.
[0041] The anchor body 21 in the memory alloy stent 20 is composed of an anchor 211 and a winding post 212. The winding post 212 is a hollow structure. The winding post 212 is used to connect the sutures used for surgery. The anchor 211 is fixed on the winding post 212. The anchor 211 is used to initially fix the memory alloy stent 20 inside the bone through the anchor 211 after the memory alloy stent 20 is inserted into the bone.
[0042] Several single blades 22 of the bracket can be arranged around the anchor 211. After the anchor 211 is inserted into the bone, the single blade of the bracket 22 is completely inside the bone. The pushing sleeve 122 is pushed so that the pushing sleeve 122 drives the limiting sleeve 121 to move. The limiting sleeve 121 is removed from the single blade of the bracket 22. The limiting sleeve 121 releases the restriction on the single blade of the bracket 22. At this time, the single blade of the bracket 22 can be unfolded inside the bone.
[0043] Each single blade 22 of the bracket is multi-branched. Such a structure can play a supporting role to the greatest extent after expansion and is in full contact with the bone cement. Its principle is similar to the principle of the use of steel bars and concrete in the construction industry. The ends of the branches of the single blade 22 of the bracket are regular small spherical protrusions, which can be tightly combined with the solidified bone cement and play a certain fixing role for the single blade 22 of the bracket.
[0044] The structure of the memory alloy stent 20 can increase the number of single blades 22 of the stent, or adopt a structure in which the ends of the branches are connected to each other, so that the connection between the skeleton, the woven mesh bag and the bone cement is tighter and not easy to be pulled out.
[0045] The memory alloy bracket 20 can also be optionally installed with a woven mesh bag 30, which is sleeved on the anchor body 21. The woven mesh bag 30 is woven from yarns of ultra-high molecular weight polyethylene material or absorbable material. The woven mesh bag 30 is used to enhance the anti-pullout performance of the memory alloy bracket 20.
[0046] Degradable bone cement can be used for the combination. After a period of time, only the memory alloy skeleton and woven mesh bag are left of the implant, which has better biocompatibility and avoids the adverse reactions that may be caused by long-term retention in the body.
[0047] Furthermore, the memory alloy stent 20 may be made of a degradable memory alloy. After a period of time, only the woven mesh bag 30 and the sutures remain as the implant, which has better MRI compatibility than ordinary metal anchors.
[0048] Usage process:
[0049] When the patient has osteoporosis, a bone drill is first used to drill a hole at the location where the bracket needs to be fixed. The bone structure is composed of cortical bone located on the surface and cancellous bone located deep inside. The hole needs to penetrate the cortical bone to reach the deep cancellous bone.
[0050] Insert the expansion balloon into the drill hole of the bone drill, and use the balloon to expand a cavity in the cancellous bone for installing the memory alloy stent.
[0051] The memory alloy bracket 20 is installed on the implantation tool 10 in advance, and the memory alloy bracket 20 is fully inserted into the cavity in the cancellous bone using the implantation tool 10. At this time, the medical staff manually pushes the pushing sleeve 122 of the implantation tool 10, and the pushing sleeve 122 drives the limiting sleeve 121 to release the restriction on the several single blades 22 on the memory alloy bracket 20. At this time, the single blades 22 of the bracket are expanded in the cavity to fill the entire cavity, and at the same time, the anchor 211 of the memory alloy bracket 20 is fixed in the cavity.
[0052] When the woven mesh bag 30 is needed, the woven mesh bag 30 follows the memory alloy stent 20 into the cavity in the cancellous bone. When the single blade 22 of the memory alloy stent 20 is unfolded, the single blade 22 will expand the woven mesh bag 30 to form a shape similar to the cavity and fill the cavity.
[0053] After the memory alloy stent 20 is expanded, a bone cement injector is used to connect the bone cement injector to the end of the pipe portion 111 in the handle portion 112 on the implantation tool 10. The bone ash water injector injects bone cement into the cavity of the cancellous bone along the pipe portion 111. After the bone cement solidifies, sutures are fixed on the winding column 212. The sutures are used to fix the injured tendon / ligament.
[0054] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.
Claims
1. A matching structure of a wire memory alloy bracket, characterized in that: It includes an implantation tool and a memory alloy bracket, wherein the memory alloy bracket is detachably mounted on the implantation tool. The memory alloy stent consists of an anchor body and a plurality of stent single blades, wherein the plurality of stent single blades are arranged around the end of the anchor body, and the stent single blades can expand by themselves when not constrained.
2. The matching structure of the wire memory alloy bracket according to claim 1, characterized in that: The implantation tool consists of a hollow implant tube and an outer sleeve. The outer sleeve is sleeved on the hollow implant tube and slides on the hollow implant tube.
3. The matching structure of the wire memory alloy bracket according to claim 2, characterized in that: The memory alloy bracket is installed at the end of the hollow implant tube, and the anchor body is communicated with the hollow implant tube.
4. The matching structure of the wire memory alloy bracket according to claim 3, characterized in that: When the outer sleeve is located at one side of the anchor body, the outer sleeve constrains a plurality of the single blades of the stent, and the plurality of single blades of the stent are bound by the outer sleeve and are surrounded and attached to the anchor body.
5. The matching structure of the wire memory alloy bracket according to claim 1, characterized in that: The plurality of single blades on the memory alloy bracket are in a multi-branched shape, and the ends of the branches of the single blade are regular small spherical protrusions.
6. The matching structure of the wire memory alloy bracket according to claim 1, characterized in that: A winding post structure is provided at the end of the memory alloy bracket, and the winding post structure is connected with a suture.
7. The matching structure of the wire memory alloy bracket according to claim 1, characterized in that: It also includes a selectively used woven mesh bag, which is sleeved on the memory alloy bracket.
8. The matching structure of the wire memory alloy bracket according to claim 7, characterized in that: The woven mesh bag is woven from yarns of ultra-high molecular weight polyethylene material or absorbable material.
9. The matching structure of the wire memory alloy bracket according to claim 1, characterized in that: The hollow implant tube of the implant tool is connected with a bone cement injector.
10. The matching structure of the wire memory alloy bracket according to claim 9, characterized in that: The bone cement and the memory alloy stent are made of degradable materials.