Fixator for rotator cuff repair
By designing a rotator cuff repair fixator, the combined structure of anchor and spherical groove is used to achieve stable fixation of the rotator cuff and humerus, solving the problems of complex operation, time-consuming and high refraction rate in the prior art, significantly improving the Repair effect and applicability.
Patent Information
- Application Number
- CN202420953355.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-06
AI Technical Summary
The existing rotator cuff repair technology is complex and time-consuming, and expensive. The knotted sutures cause the rotator cuff to contract, limit blood flow, and difficult healing, and the incidence of refraction is high.
A rotator cuff repair fixator is designed, including a fixing member, a first anchor and a second anchor through which the anchor passes through a specific through hole and a spherical groove, and the end of the fixing member can be based on the humerus and the rotator cuff. Specific structural adjustments can achieve stable fixation of the rotator cuff and humerus.
This technology simplifies surgical operations, reduces the surgical time, increases the fixed intensity, reduces the probability of re-tearing, avoids rotator cuff contraction, facilitates muscle healing, and has good applicability.
Smart Images
Figure CN222444200U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a fixator for rotator cuff repair. Background Art
[0002] The shoulder joint is the most mobile joint in the human body. It is composed of the humeral head and the glenoid cavity. The joint is stabilized mainly by the muscles, rotator cuff, ligaments and joint capsule. Four special rotator cuffs are responsible for stabilizing and guiding and keeping the joint in the center. These four rotator cuffs are called rotator cuffs. They wrap around the humeral head like a cuff and include the supraspinatus, infraspinatus, subscapularis and teres minor muscles. The rotator cuff extends from the shoulder blade to the humerus and allows the arm to move sideways and upward, rotate outward and inward, and stabilize the arm to the upper body.
[0003] These rotator cuffs play an extremely important role in maintaining the stability of the shoulder joint and supporting the movement of the shoulder joint. Due to factors such as shoulder trauma or rotator cuff aging, partial or full-thickness tearing of the rotator cuff and the humerus may occur. Currently, fixation relies on the use of wire rivets to fix the broken rotator cuff to the humerus. Specifically, one end of the rivet is inserted into the humerus, and the other end of the rivet has a suture, which passes through the torn rotator cuff and is fixed to the humerus by tying a knot. However, this technology is complicated and time-consuming to operate, requires a large number of instruments, and is expensive. The sutures must be tied multiple times in a stable manner, which will cause the rotator cuff to shrink, restrict blood flow, make healing more difficult, and have a high incidence of re-rupture. Utility Model Content
[0004] The purpose of the utility model is to provide a fixator for rotator cuff repair, which is simple to operate and has a good fixation effect, and can reduce the probability of re-tear. In addition, it can reduce rotator cuff contraction and facilitate muscle healing. During surgery, the fixation position can be adjusted according to the specific structure of the rotator cuff and humerus, and the applicability is good.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A fixator for rotator cuff repair, comprising:
[0007] A fixing member, wherein a first through hole and a second through hole are respectively provided at both ends of the fixing member, a first spherical groove is provided in the first through hole, and a second spherical groove is provided in the second through hole;
[0008] a first anchor, wherein the head of the first anchor can rotate relative to the first spherical groove, so as to change the fixing direction of the first anchor; the first anchor passes through the first through hole, so that the connecting end of the first anchor is connected to the humerus and the head of the first anchor abuts against the first spherical groove;
[0009] A second anchor, the head of the second anchor can rotate relative to the second spherical groove, so as to change the fixing direction of the second anchor; the second anchor passes through the second through hole, so that the connecting end of the second anchor is connected to the rotator cuff and the head of the second anchor is abutted against the second spherical groove.
[0010] Preferably, a first spherical surface is provided on the outer side of the head of the first anchor, and the first spherical surface can fit in the first spherical groove.
[0011] Preferably, a second spherical surface is provided on the outer side of the head of the second anchor, and the second spherical surface can fit in the second spherical groove.
[0012] Preferably, the bottom of one end of the fixing piece fixed to the humerus conforms to the outer surface of the position of the humerus to be fixed; and / or the bottom of one end of the fixing piece fixed to the rotator cuff conforms to the outer surface of the position of the rotator cuff to be fixed.
[0013] Preferably, the head of the first anchor is rotated relative to the first spherical groove so that the movable range of the first anchor forms a first cone, and the cone angle of the first cone is greater than 0 degree and less than or equal to 30 degrees; and / or,
[0014] The head of the second anchor is rotated relative to the second spherical groove so that the movable range of the second anchor forms a second cone, and the cone angle of the second cone is greater than 0 degree and less than or equal to 30 degrees.
[0015] Preferably, a plurality of protrusions are arranged at intervals at the bottom of one end of the fixing member fixed to the rotator cuff, and the plurality of protrusions can abut against the outer surface of the rotator cuff.
[0016] Preferably, the end of the fixing member fixed to the humerus is a first fixing part, the end of the fixing member fixed to the rotator cuff is a second fixing part, the middle position of the fixing member is a connecting part, and the first fixing part, the connecting part and the second fixing part are integrated.
[0017] Preferably, the size of the connecting portion is smaller than the size of the first fixing portion and the second fixing portion.
[0018] Preferably, the second fixing portion, the first anchor and the second anchor are all made of polyetheretherketone.
[0019] Preferably, an observation hole is provided at one end of the fixing member fixed to the rotator cuff for observing the fixing process.
[0020] Beneficial effects of the utility model:
[0021] The utility model provides a fixer for rotator cuff repair, comprising a fixing member, a first anchor and a second anchor. During surgery, the fixing member is placed in a suitable surgical position, the first anchor is passed through the first through hole, the connecting end of the first anchor is connected to the humerus and the head of the first anchor is abutted against the first spherical groove, and one end of the fixing member is fixed to the humerus; the second anchor is passed through the second through hole, the connecting end of the second anchor is connected to the rotator cuff and the head of the second anchor is abutted against the second spherical groove, and the other end of the fixing member is fixed to the rotator cuff, thereby achieving fixation of the broken rotator cuff and the humerus, which is simple to operate, effectively reduces the difficulty of surgical operation, reduces the operation time, increases the fixing strength, has a good fixing effect, and can reduce the probability of tearing again. The rotator cuff is fixed by tightening the anchor without knotting, which can reduce rotator cuff contraction and facilitate muscle healing. The head of the first anchor rotates relative to the first spherical groove to change the fixing direction of the first anchor, and the head of the second anchor rotates relative to the second spherical groove to change the fixing direction of the second anchor. During surgery, the fixing position can be adjusted according to the specific structure of the rotator cuff and the humerus, and the applicability is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the structure of the fixator for rotator cuff repair provided by the utility model from a first perspective;
[0023] Figure 2 This is a schematic diagram of the structure of the fixator for rotator cuff repair provided by the utility model from a second viewing angle;
[0024] Figure 3 It is an exploded view of the fixator for rotator cuff repair provided by the utility model;
[0025] Figure 4 It is a schematic structural diagram of the fixing member involved in the utility model from a first perspective;
[0026] Figure 5 It is a second perspective structural schematic diagram of the fixing member involved in the utility model.
[0027] In the figure:
[0028] 1. fixing member; 11. first through hole; 111. first spherical groove; 12. second through hole; 121. second spherical groove; 13. protrusion; 14. first fixing part; 15. second fixing part; 16. connecting part; 17. observation hole;
[0029] 2. first anchor; 21. first spherical surface;
[0030] 3. A second anchor; 31. A second spherical surface. DETAILED DESCRIPTION
[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0035] like Figures 1 to 5As shown, the utility model provides a fixer for rotator cuff repair, comprising a fixing member 1, a first anchor 2 and a second anchor 3, wherein two ends of the fixing member 1 are respectively provided with a first through hole 11 and a second through hole 12, wherein the first through hole 11 is provided with a first spherical groove 111, and the second through hole 12 is provided with a second spherical groove 121; the head of the first anchor 2 can rotate relative to the first spherical groove 111, so as to change the fixing direction of the first anchor 2; the first anchor 2 passes through the first through hole 11, so that the connecting end of the first anchor 2 is connected to the humerus and the head of the first anchor 2 abuts against the first spherical groove 111; the head of the second anchor 3 can rotate relative to the second spherical groove 121, so as to change the fixing direction of the second anchor 3; the second anchor 3 passes through the second through hole 12, so that the connecting end of the second anchor 3 is connected to the rotator cuff and the head of the second anchor 3 abuts against the second spherical groove 121.
[0036] During the operation, the fixing member 1 is placed at a suitable surgical position, the first anchor 2 is passed through the first through hole 11, the connecting end of the first anchor 2 is connected to the humerus, and the head of the first anchor 2 is abutted against the first spherical groove 111, so that one end of the fixing member 1 is fixed to the humerus; the second anchor 3 is passed through the second through hole 12, the connecting end of the second anchor 3 is connected to the rotator cuff, and the head of the second anchor 3 is abutted against the second spherical groove 121, so that the other end of the fixing member 1 is fixed to the rotator cuff, thereby achieving the fixation of the broken rotator cuff and the humerus, which is simple to operate, effectively reduces the difficulty of surgical operation, reduces the operation time, increases the fixing strength, has a good fixing effect, and can reduce the probability of tearing again. The rotator cuff is fixed by tightening the anchor without tying a knot, which can reduce the contraction of the rotator cuff and facilitate muscle healing. The head of the first anchor 2 rotates relative to the first spherical groove 111 to change the fixing direction of the first anchor 2, and the head of the second anchor 3 rotates relative to the second spherical groove 121 to change the fixing direction of the second anchor 3. During surgery, the fixing position can be adjusted according to the specific structure of the rotator cuff and the humerus, and the applicability is good.
[0037] Optionally, in the present embodiment, a first spherical surface 21 is provided on the outer side of the head of the first anchor 2, and the first spherical surface 21 can fit with the first spherical groove 111. This arrangement reduces the wear on the inner wall of the first spherical groove 111, and can increase the contact area between the head of the first anchor 2 and the first spherical groove 111, so that the abutment effect between the head of the first anchor 2 and the first spherical groove 111 is better, thereby achieving a better fixing effect. Optionally, in the present embodiment, a second spherical surface 31 is provided on the outer side of the head of the second anchor 3, and the second spherical surface 31 can fit with the second spherical groove 121. This arrangement reduces the wear on the inner wall of the second spherical groove 121, and can increase the contact area between the head of the second anchor 3 and the second spherical groove 121, so that the abutment effect between the head of the second anchor 3 and the second spherical groove 121 is better, thereby achieving a better fixing effect.
[0038] Optionally, the bottom of the end of the fixing member 1 fixed to the humerus is shaped in accordance with the outer surface of the position to be fixed of the humerus. It is shaped in accordance with the outer surface of the position to be fixed of the humerus, thereby increasing the effective fixing area. Optionally, the bottom of the end of the fixing member 1 fixed to the rotator cuff is shaped in accordance with the outer surface of the position to be fixed of the rotator cuff. It is shaped in accordance with the outer surface of the position to be fixed of the rotator cuff, thereby increasing the effective fixing area.
[0039] Optionally, in this embodiment, the head of the first anchor 2 rotates relative to the first spherical groove 111 so that the range of motion of the first anchor 2 forms a first cone, and the cone angle of the first cone is greater than 0 degrees and less than or equal to 30 degrees. The size of the cone angle of the first cone is related to the design size of the first spherical groove 111. For example, when the first spherical groove 111 is designed to make the cone angle of the first cone equal to 30 degrees, the maximum angle between the axis of the head of the first anchor 2 and the center line of the notch of the first spherical groove 111 is 15 degrees, and the minimum angle is 0 degrees. When the first spherical groove 111 is designed to make the cone angle of the first cone equal to 20 degrees, the maximum angle between the axis of the head of the first anchor 2 and the center line of the notch of the first spherical groove 111 is 10 degrees, and the minimum angle is 0 degrees. The size of the first cone angle formed by the rotation of the head of the first anchor 2 relative to the first spherical groove 111 is set within a range greater than 0 degrees and less than or equal to 30 degrees, so that when the first anchor 2 fixes the humerus, the fixation effect is better. Optionally, in this embodiment, the head of the second anchor 3 rotates relative to the second spherical groove 121 so that the range of motion of the second anchor 3 forms a second cone, and the cone angle of the second cone is greater than 0 degrees and less than or equal to 30 degrees. The cone angle of the second cone formed by rotating the head of the second anchor 3 relative to the second spherical groove 121 is set within a range of greater than 0 degrees and less than or equal to 30 degrees, so that when the second anchor 3 fixes the rotator cuff, the fixation effect is better.
[0040] Optionally, in this embodiment, if Figure 4 As shown, the bottom of one end of the fixing member 1 fixed to the rotator cuff is provided with a plurality of protrusions 13 at intervals, and the plurality of protrusions 13 can abut against the outer surface of the rotator cuff. When fixing, the plurality of protrusions 13 are provided to keep a certain distance between the fixing member 1 and the surface of the rotator cuff, so as to facilitate blood flow and increase the healing effect. In addition, the fixing effect of the rotator cuff can be increased.
[0041] Alternatively, if Figure 1 and Figure 5 As shown, one end of the fixing member 1 fixed to the rotator cuff is provided with an observation hole 17 for observing the fixing process. When the first anchor 2 is inserted and fixed to the humerus and the second anchor 3 is inserted and fixed to the rotator cuff, the fixing process can be observed through the observation hole 17.
[0042] Optionally, in this embodiment, if Figure 1As shown, the end of the fixing member 1 fixed to the humerus is the first fixing portion 14, the end of the fixing member 1 fixed to the rotator cuff is the second fixing portion 15, and the middle position of the fixing member 1 is the connecting portion 16. The first fixing portion 14, the connecting portion 16 and the second fixing portion 15 are integrated, with good mechanical properties and convenient fixation. Furthermore, in this embodiment, the size of the connecting portion 16 is smaller than the size of the first fixing portion 14 and the second fixing portion 15. After the first anchor 2 is fixed to the humerus, since the size of the connecting portion 16 is smaller than the size of the first fixing portion 14 and the second fixing portion 15, when the second anchor 3 is inserted and fixed to the rotator cuff, the connecting portion 16 can relatively provide a certain elastic deformation, which is convenient for the second fixing portion 15 to fit the rotator cuff and the fixation of the second anchor 3.
[0043] Optionally, in this embodiment, the second fixing portion 15 is a fan-shaped structure that matches the shape of the rotator cuff, and the bottom of the fan-shaped structure is shaped in accordance with the outer surface of the position to be fixed of the rotator cuff. The second fixing portion 15 is a fan-shaped structure that matches the shape of the rotator cuff to save materials. Optionally, the first fixing portion 14, the connecting portion 16 and the second fixing portion 15 are all fixing plates to save materials. Optionally, the materials of the second fixing portion 15, the first anchor 2 and the second anchor 3 are all polyetheretherketone material, i.e., PEEK material, which has excellent mechanical properties and biocompatibility.
[0044] Optionally, at least one first through hole 11 is provided, and the first anchor 2 is correspondingly arranged with the first through hole 11; at least one second through hole 12 is provided, and the second anchor 3 is correspondingly arranged with the second through hole 12. Optionally, in this embodiment, the connecting end of the first anchor 2 is provided with an external thread for connecting with the humerus; the connecting end of the second anchor 3 is provided with an external thread for connecting with the rotator cuff, and the fixing effect is good. Optionally, the size range of the diameter of the connecting end of the first anchor 2 is φ2~φ6.5mm, and the size range of the length is 8mm~40mm; the size range of the diameter of the connecting end of the second anchor 3 is φ1.5~φ3.5mm, and the size range of the length is 5mm~20mm. Optionally, in this embodiment, there is one first through hole 11, and two second through holes 12 are provided, and the line connecting the centers of the two second through holes 12 does not coincide with the center of the first through hole 11, and the diameter and length of the connecting end of the first anchor 2 are both larger than the second anchor 3, with a simple structure, low cost, little destructiveness to the humerus and rotator cuff, and a good fixing effect.
[0045] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A fixator for rotator cuff repair, characterized in that: include: A fixing member (1), wherein two ends of the fixing member (1) are respectively provided with a first through hole (11) and a second through hole (12), the first through hole (11) is provided with a first spherical groove (111), and the second through hole (12) is provided with a second spherical groove (121); a first anchor (2), wherein the head of the first anchor (2) can rotate relative to the first spherical groove (111) to change the fixing direction of the first anchor (2); the first anchor (2) passes through the first through hole (11), so that the connecting end of the first anchor (2) is connected to the humerus and the head of the first anchor (2) abuts against the first spherical groove (111); A second anchor (3), wherein the head of the second anchor (3) can rotate relative to the second spherical groove (121) to change the fixing direction of the second anchor (3); the second anchor (3) passes through the second through hole (12), so that the connecting end of the second anchor (3) is connected to the rotator cuff and the head of the second anchor (3) abuts against the second spherical groove (121).
2. The fixator for rotator cuff repair according to claim 1, characterized in that: A first spherical surface (21) is provided on the outside of the head of the first anchor (2), and the first spherical surface (21) can fit in the first spherical groove (111).
3. The fixator for rotator cuff repair according to claim 1, characterized in that: A second spherical surface (31) is provided on the outside of the head of the second anchor (3), and the second spherical surface (31) can fit in the second spherical groove (121).
4. The fixator for rotator cuff repair according to claim 1, characterized in that: The bottom of one end of the fixing member (1) fixed to the humerus is shaped in conformity with the outer surface of the position of the humerus to be fixed; and / or the bottom of one end of the fixing member (1) fixed to the rotator cuff is shaped in conformity with the outer surface of the position of the rotator cuff to be fixed.
5. The fixator for rotator cuff repair according to claim 1, characterized in that: The head of the first anchor (2) rotates relative to the first spherical groove (111) so that the movable range of the first anchor (2) forms a first cone, and the cone angle of the first cone is greater than 0 degrees and less than or equal to 30 degrees; and / or, The head of the second anchor (3) rotates relative to the second spherical groove (121) so that the movable range of the second anchor (3) forms a second cone, and the cone angle of the second cone is greater than 0 degrees and less than or equal to 30 degrees.
6. The fixator for rotator cuff repair according to claim 1, characterized in that: A plurality of protrusions (13) are arranged at intervals at the bottom of one end of the fixing member (1) fixed to the rotator cuff, and the plurality of protrusions (13) can abut against the outer surface of the rotator cuff.
7. The fixator for rotator cuff repair according to any one of claims 1 to 6, characterized in that: The end of the fixing member (1) fixed to the humerus is a first fixing portion (14), the end of the fixing member (1) fixed to the rotator cuff is a second fixing portion (15), the middle position of the fixing member (1) is a connecting portion (16), and the first fixing portion (14), the connecting portion (16) and the second fixing portion (15) are integrally arranged.
8. The fixator for rotator cuff repair according to claim 7, characterized in that: The size of the connecting portion (16) is smaller than the size of the first fixing portion (14) and the second fixing portion (15).
9. The fixator for rotator cuff repair according to claim 7, characterized in that: The second fixing portion (15), the first anchor (2) and the second anchor (3) are all made of polyetheretherketone material.
10. The fixator for rotator cuff repair according to any one of claims 1 to 6, characterized in that: An observation hole (17) is provided at one end of the fixing piece (1) fixed to the rotator cuff for observing the fixing process.