Thumb carpometacarpal joint suspension anchor and inserter
By designing a thumb wrist joint suspension anchor that includes index finger anchor, thumb anchor and adjustment gasket, the problem of existing anchor loosening after implantation is solved, achieving higher surgical success rate and treatment Effect.
Patent Information
- Application Number
- CN202420566284.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-21
AI Technical Summary
Existing thumb and wrist joint suspension anchors are prone to loosening after implantation, resulting in surgical failure and poor treatment effect.
A thumb wrist joint suspension anchor including index finger anchor, thumb anchor and adjustment gasket was designed. The two anchors were connected by sutures, and an anti-reversal structure was added to the adjustment gasket and anchor head. Prevent the anchor from reversing and loosening.
It effectively reduces the risk of anchor loosening, improves the success rate of surgery and the effectiveness of treatment, and reduces the possibility of surgery failure.
Smart Images
Figure CN222466984U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of medical device technology, and in particular to a thumb carpometacarpal joint suspension anchor and inserter. Background Art
[0002] Arthritis refers to an inflammatory disease that occurs in the joints and surrounding tissues of the human body and is caused by inflammation, infection, degeneration, trauma or other factors. The clinical manifestations of arthritis are pain, swelling and joint dysfunction. There are dozens of types of arthritis, among which thumb arthritis is a relatively common one.
[0003] Thumb arthritis is common in older people and occurs when cartilage gradually wears away from the end of the bone that forms the joint at the base of the thumb, also known as the carpometacarpal (CMC) joint. Thumb arthritis can cause severe pain, swelling, and loss of strength and range of motion, making it difficult to perform simple tasks such as turning doorknobs and opening jars. Treatment usually involves a combination of medications and splints, and severe thumb arthritis may require surgery.
[0004] There are two main surgical treatments for thumb arthritis recorded in the relevant technology. The first is the titanium plate suspension therapy with loops. The steel plate with loops is a new type of steel plate fixation material, mainly made of titanium alloy. This material has good stability and biocompatibility. Generally, there will be no rejection reaction after the operation, and it will not cause infection in the patient. However, the titanium plate suspension therapy with loops requires two incisions to complete the suspension support of the thumb, and the operation is relatively complicated. The second is the anchor fixation suspension therapy, that is, anchors are implanted on the index finger metacarpal bone and the thumb metacarpal bone respectively, and the two anchors are connected by sutures to support the thumb. The anchor implantation is convenient and quick, and the trauma to the patient is small. However, due to the different structures of the index finger metacarpal bone and the thumb metacarpal bone, the existing anchors are at risk of loosening after being implanted in the thumb. Once the anchors become loose, it will lead to the failure of the operation, which will directly affect the treatment effect. Utility Model Content
[0005] In order to reduce the risk of loosening of existing anchors after being implanted in the thumb and to prevent the anchor fixation failure from causing surgical failure, the present application provides a thumb carpometacarpal joint suspension anchor and an inserter.
[0006] The present application provides a thumb carpometacarpal joint suspension anchor and inserter using the following technical solutions:
[0007] A thumb carpometacarpal joint suspension anchor, comprising an index finger anchor, a thumb anchor and an adjustment gasket, wherein the index finger anchor and the thumb anchor are connected by sutures;
[0008] The index finger anchor is implanted into the index finger metacarpal bone;
[0009] The thumb anchor is implanted in the metacarpal bone of the thumb, and comprises a nail head and a nail body connected to the nail head. The adjusting gasket is circumferentially sleeved on the nail body, and the adjusting gasket is rotatably connected to the nail body. The adjusting gasket is located at one end of the nail body close to the nail head. The sides of the adjusting gasket and the nail head close to each other are both formed with inverted teeth. The inverted teeth of the adjusting gasket and the inverted teeth on the nail head are in contact with each other, and the inverted teeth can only allow the nail head and the adjusting gasket to rotate in the positive direction.
[0010] By adopting the above technical solution, during surgery, the index finger anchor is implanted into the index finger metacarpal bone, sutures are threaded on the index finger anchor, and the sutures are connected to the thumb anchor. By adjusting the length of the sutures, the thumb is suspended and supported, and the thumb anchor is screwed forward to implant the nail body. By using the inverted teeth of the adjustment gasket and the inverted teeth on the nail head, when the thumb anchor is implanted, the inverted teeth will not prevent the nail head from rotating. Since the inverted teeth can only allow the nail head and the adjustment gasket to rotate forward, when the thumb anchor tends to loosen, the staggered inverted teeth can prevent the thumb anchor from rotating in the opposite direction, thereby achieving an anti-loosening effect and effectively reducing the possibility of surgical failure.
[0011] Optionally, a plurality of first threading holes are formed on the adjusting gasket, and the plurality of first threading holes are distributed at intervals along the circumference of the adjusting gasket.
[0012] By adopting the above technical solution, the threading of sutures is facilitated and different surgical requirements can be met.
[0013] Optionally, an annular step is processed on the nail body, the adjusting gasket is sleeved on the annular step, and the annular step is used to fix the suture.
[0014] By adopting the above technical solution, after adjusting the length of the suture, the thumb anchor is implanted. During the screwing-in process, the annular step squeezes the suture, thereby achieving the goal of fixing the suture without tying a knot.
[0015] Optionally, the adjusting gasket is C-shaped.
[0016] By adopting the above technical solution, it is convenient to adjust the sleeve of the gasket and also convenient to thread the suture.
[0017] Optionally, a second threading hole is formed at the tail of the index finger anchor.
[0018] By adopting the above technical solution and utilizing the provision of the second threading hole, it is convenient to fix the suture on the index finger anchor.
[0019] Optionally, the nail body and the nail head are integrally formed.
[0020] By adopting the above technical solution, the overall strength of the thumb anchor can be improved, and the safety during the implantation process and the use process can be improved.
[0021] Optionally, an inserter for a thumb carpometacarpal joint suspension anchor is used to implant a thumb carpometacarpal joint suspension anchor, comprising a handle and a connecting rod connected to the handle, wherein the index finger anchor and the thumb anchor are both implanted into a human body through the connecting rod.
[0022] By adopting the above technical solution, the rapid implantation of the index finger anchor and the thumb anchor is achieved by utilizing the cooperation of the inserter and the index finger anchor and the thumb anchor.
[0023] Optionally, the connecting rod has a hexagonal cross-section, the nail head is provided with a hole groove for inserting the connecting rod, the connecting rod is provided with a hexagonal inner hole, and the index finger anchor is formed with a hexagonal connecting column that can be inserted into the inner hole.
[0024] By adopting the above technical solution, the index finger anchor and the thumb anchor can be implanted using the same connecting rod, making the operation more convenient and cost-saving.
[0025] Optionally, a cavity is formed on the handle, and the thumb anchor can be placed in the cavity.
[0026] By adopting the above technical solution, the thumb anchor can be placed in the cavity during storage, which is more convenient.
[0027] Optionally, the handle is an ergonomically designed structure.
[0028] By adopting the above technical solution and utilizing this special design, doctors can have a better sense of use and grip, and improve stability during operation.
[0029] In summary, the present application includes at least one of the following beneficial technical effects:
[0030] 1. The present application provides a thumb carpometacarpal joint suspension anchor, which includes an index finger anchor and a thumb anchor. When used, the two anchors are connected by sutures to achieve suspension support for the thumb, saving surgical time and alleviating the patient's pain. An adjustment gasket is set on the thumb anchor, and an anti-reversal structure is added to the adjustment gasket and the thumb anchor head. This structure can prevent the anchor from loosening due to reversal after implantation, effectively reducing the possibility of surgical failure;
[0031] 2. In the present application, an annular step is provided on the thumb anchor. This structure can be used to stretch the suture to adjust the joint gap when the index finger anchor is about to be implanted, and then the anchor can be screwed inward so that the annular step squeezes the suture, thereby achieving the effect of fixing the suture without tying a knot;
[0032] 3. The present application also provides an inserter for a thumb carpometacarpal joint suspension anchor, which includes a handle and a connecting rod. The connecting rod adopts an inner and outer hexagonal structure, so that one inserter can support the use of two anchors at the same time, making the operation more convenient and cost-saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 It is a schematic diagram of the structure of the index finger anchor in this application;
[0034] Figure 2 is a schematic diagram of the structure of the thumb anchor in the present application;
[0035] Figure 3 is a front view of the thumb anchor in the present application;
[0036] Figure 4 It is a schematic diagram of the overall structure of the thumb carpometacarpal joint suspension anchor and inserter in the present application;
[0037] Figure 5 It is a partial cross-sectional view of the thumb carpometacarpal joint suspension anchor and inserter in the present application.
[0038] Explanation of the accompanying reference numerals: 1. index finger anchor; 2. thumb anchor; 21. nail head; 22. nail body; 3. adjustment gasket; 4. anti-loosening structure; 41. inverted tooth; 5. first threading hole; 6. second threading hole; 7. annular step; 8. handle; 9. connecting rod; 10. inner hole; 11. hole groove; 12. connecting column; 13. cavity. DETAILED DESCRIPTION
[0039] The following is combined with Figure 1-5 This application is described in further detail.
[0040] The present application embodiment discloses a thumb carpometacarpal joint suspension anchor, referring to Figure 1 and Figure 2 The thumb carpometacarpal joint suspension anchor comprises an index finger anchor 1, a thumb anchor 2 and an adjusting gasket 3. The index finger anchor 1 and the thumb anchor 2 are connected by sutures. The index finger anchor 1 is implanted in the index finger metacarpal bone, and the thumb anchor 2 is implanted in the thumb metacarpal bone. The adjusting gasket 3 is annularly sleeved on the thumb anchor 2 and the adjusting gasket 3 is rotatably connected to the thumb anchor 2. An anti-loosening structure 4 is formed between the adjusting gasket 3 and the thumb anchor 2.
[0041] During the operation, the index finger anchor 1 is first implanted, and sutures are passed between the index finger anchor 1 and the thumb anchor 2. The length of the sutures is adjusted to achieve suspension support for the thumb, and then the thumb anchor 2 is implanted to achieve suture fixation. After the implantation is completed, due to the presence of the anti-loosening structure 4, the thumb anchor 2 can be prevented from rotating in the direction of screwing out, so as to achieve the effect of anti-reversal, thereby effectively reducing the possibility of surgical failure.
[0042] Specifically, refer to Figure 2 and Figure 3 The thumb anchor 2 includes a nail head 21 and a nail body 22 connected to the nail head 21. In this embodiment, the adjusting gasket 3 is annularly sleeved on the nail body 22 and the adjusting gasket 3 is rotatably connected to the nail body 22. The adjusting gasket 3 is located at one end of the nail body 22 close to the nail head 21. The side where the adjusting gasket 3 and the nail head 21 are close to each other is formed with inverted teeth 41. The inverted teeth 41 of the adjusting gasket 3 and the inverted teeth 41 on the nail head 21 are in contact with each other. The inverted teeth 41 can only allow the nail head 21 and the adjusting gasket 3 to rotate in the positive direction. The positive rotation is the direction of rotation of the thumb anchor 2 when implanted. When the thumb anchor 2 is implanted, since the nail head 21 and the adjusting gasket 3 rotate in the positive direction, the inverted teeth 41 will not hinder the rotation of the thumb anchor 2, so that the thumb anchor 2 can be implanted smoothly. When the thumb anchor 2 tends to loosen, the inverted teeth 41 will hinder the thumb anchor 2 from rotating in the reverse direction to achieve an anti-loosening effect.
[0043] In this embodiment, the nail body 22 and the nail head 21 are integrally formed, and the integrated structural design can improve the overall strength of the thumb anchor 2 and improve the safety of the thumb anchor 2 during the implantation process and the use process.
[0044] Reference Figure 1 and Figure 2 A plurality of first threading holes 5 are provided on the adjusting gasket 3, and the plurality of first threading holes 5 are spaced apart along the circumference of the adjusting gasket 3. A second threading hole 6 is provided at the tail of the index finger anchor 1. The second threading hole 6 facilitates the connection and fixation of the suture on the index finger anchor 1. The first threading hole 5 facilitates the threading of the suture on the thumb anchor 2. At the same time, since each patient has a different body structure, different first threading holes 5 can be used to meet different surgical needs.
[0045] Further, refer to Figure 2 and Figure 3 The nail body 22 is processed with an annular step 7, the adjusting gasket 3 is sleeved on the annular step 7, and the first threading hole 5 is directly opposite to the annular step 7. After adjusting the length of the suture, the thumb anchor 2 is implanted. During the screwing process, the annular step 7 squeezes the suture, thereby achieving a knot-free fixing effect on the suture, and finally achieving the purpose of achieving a knot-free suspension support for the thumb.
[0046] In this embodiment, the adjusting gasket 3 is C-shaped, which is convenient for fitting the adjusting gasket 3 and threading the suture.
[0047] Of course, in this embodiment, the materials of the thumb anchor 2, the index finger anchor 1 and the adjustment gasket 3 are not specifically limited, and the structure of the index finger anchor 1, the structure of the nail body 22, and the structure of the nail head 21 are not described in detail.
[0048] The implementation principle of the thumb carpometacarpal joint suspension anchor of the embodiment of the present application is as follows: during surgery, the index finger anchor 1 is first implanted into the index finger metacarpal bone, sutures are threaded on the index finger anchor 1, and the sutures are connected to the thumb anchor 2. By adjusting the length of the sutures, the thumb is suspended and supported, and the thumb anchor 2 is screwed forward to implant the nail body 22. Since the inverted teeth 41 can only allow the nail head 21 and the adjustment gasket 3 to rotate forward, when the thumb anchor 2 tends to loosen, the staggered inverted teeth 41 can prevent the thumb anchor 2 from rotating in the opposite direction, thereby achieving an anti-loosening effect and effectively reducing the possibility of surgical failure.
[0049] The present application also discloses an inserter for a thumb carpometacarpal joint suspension anchor, which is used to implant an index finger anchor 1 and a thumb anchor 2. Figure 4 and Figure 5 The inserter of the thumb carpometacarpal joint suspension anchor comprises a handle 8 and a connecting rod 9 connected to the handle 8, and the index finger anchor 1 and the thumb anchor 2 are implanted in the human body through the connecting rod 9. During the operation, the insertion device cooperates with the index finger anchor 1 and the thumb anchor 2 to achieve rapid implantation of the index finger anchor 1 and the thumb anchor 2, and the operation process can be simplified and the operation difficulty can be reduced.
[0050] Specifically, refer to Figure 3 and Figure 5 The cross section of the connecting rod 9 is hexagonal, and a hole slot 11 for inserting the connecting rod 9 is provided on the nail head 21. A hexagonal inner hole 10 is provided in the connecting rod 9, and a hexagonal connecting column 12 capable of being inserted into the inner hole 10 is formed on the index finger anchor 1. During use, when the index finger anchor 1 needs to be implanted, the connecting column 12 is inserted into the inner hole 10 of the connecting rod 9, and the connecting column 12 is snap-fitted with the connecting rod 9, and the insertion device is rotated to implant the index finger anchor 1. When the thumb anchor 2 needs to be implanted, the connecting rod 9 is inserted into the hole slot 11, and the thumb anchor 2 is snap-fitted with the connecting rod 9, and the insertion device is rotated to implant the thumb anchor 2. In this way, the same connecting rod 9 can be used to implant the index finger anchor 1 and the thumb anchor 2, making the operation more convenient and cost-saving.
[0051] Of course, in this embodiment, the hole slot 11, the connecting rod 9 and the connecting column 12 all adopt a hexagonal structure. According to actual conditions, other shapes that meet the requirements can also be adopted, and the hexagonal structure is preferred.
[0052] In particular, a cavity 13 is formed on the handle 8, and the thumb anchor 2 with the adjustment pad 3 can be placed in the cavity 13. The thumb anchor 2 can be placed in the cavity 13 during storage and surgery, which makes it more convenient to take and put, and reduces the possibility of loss and contamination.
[0053] In this embodiment, the handle 8 is an ergonomically designed structure. This special design can provide the doctor with a better sense of use and grip, and improve stability during operation.
[0054] The implementation principle of the inserter of the thumb carpometacarpal joint suspension anchor in the embodiment of the present application is as follows: when the thumb anchor 2 needs to be implanted, the connecting rod 9 is inserted into the hole 11, the thumb anchor 2 and the connecting rod 9 are snap-connected, and the inserter is rotated to implant the thumb anchor 2. In this way, the same connecting rod 9 can be used to implant the index finger anchor 1 and the thumb anchor 2, making the operation more convenient and cost-saving.
[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A thumb carpometacarpal joint suspension anchor, characterized in that: It comprises an index finger anchor (1), a thumb anchor (2) and an adjustment pad (3), wherein the index finger anchor (1) and the thumb anchor (2) are connected by sutures; The index finger anchor (1) is implanted into the metacarpal bone of the index finger; The thumb anchor (2) is implanted in the metacarpal bone of the thumb. The thumb anchor (2) comprises a nail head (21) and a nail body (22) connected to the nail head (21). The adjusting gasket (3) is annularly sleeved on the nail body (22). The adjusting gasket (3) is rotatably connected to the nail body (22). The adjusting gasket (3) is located at one end of the nail body (22) close to the nail head (21). The side where the adjusting gasket (3) and the nail head (21) are close to each other is formed with inverted teeth (41). The inverted teeth (41) of the adjusting gasket (3) and the inverted teeth (41) on the nail head (21) are in contact with each other. The inverted teeth (41) can only allow the nail head (21) and the adjusting gasket (3) to rotate in the positive direction.
2. The thumb carpometacarpal joint suspension anchor according to claim 1, characterized in that: The adjusting gasket (3) is provided with a plurality of first threading holes (5), and the plurality of first threading holes (5) are distributed at intervals along the circumference of the adjusting gasket (3).
3. The thumb carpometacarpal joint suspension anchor according to claim 2, characterized in that: An annular step (7) is processed on the nail body (22), the adjusting gasket (3) is sleeved on the annular step (7), and the annular step (7) is used to fix the suture.
4. The thumb carpometacarpal joint suspension anchor according to claim 3, characterized in that: The adjusting gasket (3) is C-shaped.
5. The thumb carpometacarpal joint suspension anchor according to claim 1, characterized in that: A second threading hole (6) is formed at the tail of the index finger anchor nail (1).
6. The thumb carpometacarpal joint suspension anchor according to claim 1, characterized in that: The nail body (22) and the nail head (21) are integrally formed.
7. An inserter for a thumb carpometacarpal joint suspension anchor, used for implanting the thumb carpometacarpal joint suspension anchor as claimed in any one of claims 1 to 6, characterized in that: It comprises a handle (8) and a connecting rod (9) connected to the handle (8); the index finger anchor (1) and the thumb anchor (2) are both implanted in the human body via the connecting rod (9).
8. The inserter for the thumb carpometacarpal joint suspension anchor according to claim 7, characterized in that: The cross section of the connecting rod (9) is hexagonal, the nail head (21) is provided with a hole groove (11) for the connecting rod (9) to be inserted, the connecting rod (9) is provided with a hexagonal inner hole (10), and the index finger anchor nail (1) is formed with a hexagonal connecting column (12) capable of being inserted into the inner hole (10).
9. The inserter for the thumb carpometacarpal joint suspension anchor according to claim 7, characterized in that: A cavity (13) is formed on the handle (8), and the thumb anchor (2) can be placed in the cavity (13).