Anti-brushing sheath structure convenient to pull in and fix

Abstract

The utility model discloses an anti-brushing sheath structure convenient to pull in and fix, and aims to provide the anti-brushing sheath structure convenient to pull in and fix, which has the advantages that a structure for fixing a graft has high adaptability to a bone tunnel, the bungee jumping effect and the windshield wiper effect are eliminated so as to facilitate healing and growth, the surgical operation is convenient and fast, and the stability is high. The device comprises a plurality of sheath sheets and an elastic rope loop, one end of each sheath sheet is provided with a through hole, the elastic rope loop penetrates through each through hole to form an annular structure, sliding guide rails are arranged on the inner sides of the sheath sheets, the sliding guide rails are in sliding connection with a fixing ring, the fixing ring penetrates through each sliding guide rail to form an annular structure, the fixing ring is provided with a pull rope, one end of the pull rope is connected with the fixing ring, and the other end of the pull rope is connected with the elastic rope loop. And the other end of the pull rope penetrates through the elastic rope loop. The utility model has the beneficial effects that the graft is protected, the bone tunnel is adaptively filled, the bungee jumping effect and the windshield wiper effect are eliminated at the same time, and the bone can be efficiently healed and grow; the structure facilitates adaptive installation and stable connection; and the operation fluency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an anti-brush sheath structure which is convenient for pulling in and fixing. Background Art

[0002] The traditional ACL reconstruction tibial bone tunnel is a fully penetrating antegrade bone tunnel, and the tibial tendon is fixed with a compression screw. The all-inside reconstruction technique uses a reverse drill to drill the tibial bone tunnel in reverse, and the tibial side is fixed with a suspension plate. The defects of all-inside reconstruction tendon suspension fixation: Because the cortical fixation point of the cortical suspension fixation is far away from the anatomical end point, the tendon and rope loop are easy to move up and down and left and right after surgery, resulting in a "bungee effect" and "wiper effect", the latter two of which are important mechanical factors leading to bone tunnel expansion. Patients need to perform functional exercises after surgery. During the flexion and extension of the knee joint, there will always be different degrees of "bungee effect" and "wiper effect", which are not conducive to tendon healing and bone tunnel growth.

[0003] Chinese Patent Authorization Announcement Number: CN 211131533 U, Authorization Announcement Date July 31, 2020. The utility model discloses a ligament reconstruction fixation device, comprising a ligament fixing structure and a ligament; the ligament fixing structure is connected to one end of the ligament; along the extension direction perpendicular to the ligament, the maximum size of the ligament fixing structure is larger than the size of the ligament. The shortcomings of this technical solution are: 1. The bone canal (bone tunnel) has low adaptability. In order to prevent the continuous inhalation of synovial fluid and thus reduce the corrosion of synovial fluid on the bone canal wall, the full-inside reconstruction technology uses a reverse drill for reverse drilling. The bone canal has a structural shape that is large inside and small outside. The ligament fixation device in the solution reduces its applicability; 2. There is a "bungee effect" and a "windshield wiper effect" in the bone canal. At the bone canal opening near one end of the joint cavity, the contact area of ​​the ligament at one end of the bone canal opening is large, resulting in the existence of the "bungee effect" and the "windshield wiper effect"; 3. The connection operation with the bone canal is difficult. During the connection, the ligament fixing structure of the two bone canals needs to be clamped inside the bone tunnel through tension or fixed by traditional methods such as interface screws, suture bridges or U-shaped nails, which increases the difficulty of the connection operation and may even require the expansion of the surgical incision. Some operations need to be reversed, which is not conducive to the operator's operation and has low connection stability.

[0004] In summary, the structure of the fixed graft has low adaptability to the bone canal, and there is a "bungee effect" and a "wiper effect" that are not conducive to healing growth. The connection with the bone canal is difficult and has low stability. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art that the structure of the fixed graft has low adaptability to the bone canal, has a "bungee effect" and a "wiper effect" which are not conducive to healing growth, and has difficult connection operation with the bone canal and low stability. The utility model provides a structure of the fixed graft which has high adaptability to the bone canal, eliminates the "bungee effect" and the "wiper effect" to facilitate healing growth and surgical operation, and has a high stability and an anti-brush sheath structure that is easy to pull in and fix.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A brush-proof sheath structure that is easy to pull in and fix, comprises a sheath piece and an elastic rope loop, wherein a plurality of sheath pieces are provided, each of which has a through hole at one end, and the elastic rope loop passes through each through hole to form a ring-shaped structure, a sliding guide rail is provided on the inner side of the sheath piece, and the sliding guide rail is slidably connected with a fixing ring, and the fixing ring passes through each sliding guide rail to form a ring-shaped structure, and the fixing ring is provided with a draw rope, one end of the draw rope is connected to the fixing ring, and the other end of the draw rope passes through the elastic rope loop.

[0008] Each sheath piece has a specific and overall enclosed ring structure, which is suitable for being used as a support frame connected in the bone channel, so that the graft can pass through the sheath pieces. The support and wrapping of the sheath pieces reduce the contact area and friction between the graft and the bone, so that the graft is fixed and protected at the same time, eliminating the "bungee effect" and "wiper effect". One end of each sheath piece is provided with a perforation, so that an elastic rope loop with elasticity passes through the perforation to form a ring, and then one end of each sheath piece is bundled into a more concentrated end, so that this end of the sheath piece can quickly enter the bone channel without excessive friction with the bone channel, thereby improving efficiency and protecting tissues; the other end of the sheath piece is provided with a sliding guide rail, which is a through-hole structure connecting the two sides of the sheath piece, so that the fixing ring passes through each sliding guide rail to connect each sheath piece, so that each sheath piece is stably supported to ensure greater stability, and then each sheath piece can be stably placed in the bone channel, and the fixing ring is connected with a pull rope, which can slide on the sliding guide rail by pulling, and then the sheath piece obtains a suitable support point through the moving support of the fixing ring, further improving the stability of the structural connection. The effect of protecting the graft, adaptively filling the bone channel, eliminating the "bungee effect" and "wiper effect" to achieve efficient healing and growth, and facilitating adaptive installation and stable connection is achieved.

[0009] Preferably, the sheath piece is connected with anti-skid barbs, and there are several anti-skid barbs, which are arranged vertically on the outer surface of the sheath piece, and the anti-skid barbs face one side of the fixing ring. The outer surface of the sheath piece is connected with anti-skid barbs, which increases the pressure to make the sheath piece connection more stable. In addition, the anti-skid barbs are arranged vertically and connected to the outer surface of the sheath piece, and the tip is opposite to one end of the elastic rope loop, which makes it easy for the sheath piece to enter and difficult for the sheath piece to escape, making the sheath piece more stable in the bone tunnel. This further improves the stability of the structural connection.

[0010] Preferably, a fastening slide bar is connected inside the sliding guide rail, one side of the fastening slide bar is a smooth surface, and the other side of the fastening slide bar is an undulating curved surface. The fastening slide bar is connected to the inner side of the sliding guide rail, and the fixing ring is slidably connected to one side of the curved surface of the fastening slide bar. The fastening slide bar is connected inside the sliding guide rail, so that when the fixing ring is pulled by the pull rope and moves toward the elastic rope loop, the thrust of the bone channel is strengthened, so that the width of the structure is reduced when it is extended to quickly enter the bone channel, and the pressure of the anti-slip barb on the bone channel wall is increased after entering. The convenience and stability of the structure installation are further improved.

[0011] Preferably, the sheath piece is provided with a sliding hole, which is connected to the sliding guide rail, one end of the pull rope passes through the sliding hole and is connected to the fixed ring, and the other end of the pull rope passes through the sliding hole and extends out of the elastic rope loop. The sheath piece is provided with a sliding hole connected to the sliding guide rail, so that the pull rope passes through the sliding hole and extends into the guide slide rail and is connected to the fixed ring, thereby facilitating the arrangement of the pull rope and preventing uneven force due to side pulling, thereby achieving the effect of improving structural stability and smooth operation.

[0012] Preferably, the sheath piece is provided with an elastic rope, one end of which is connected to the inner wall of the sheath piece, and the other end of which is connected to a clustering plate, on which a clustering hole is provided, through which the pull rope passes. A clustering plate is provided at one end of the sheath piece surrounded by the elastic rope loop, so that the pull ropes of each sheath piece can be clustered and arranged through the clustering hole on the clustering plate, thereby further improving the operating efficiency of the structure.

[0013] Preferably, the clustering plate is provided with a positioning hole. A positioning hole for a rope hole connected to the graft is reserved on the clustering plate, so that the rope of the graft can quickly pass through the positioning hole, thereby achieving the effect of improving the efficiency of the operation.

[0014] The beneficial effects of the utility model are: protecting the graft, adaptively filling the bone channel, and eliminating the "bungee effect" and "wiper effect" at the same time, thereby achieving efficient healing and growth; the structure is convenient for adaptive installation and stable connection; and the operation fluency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 is a cross-sectional view of the connection between the elastic rope loop and the sheath piece;

[0017] Figure 3 It is a cross-sectional view of the sheath.

[0018] In the figure: 1. sheath, 2. elastic rope loop, 3. perforation, 4. sliding guide, 5. fixing ring, 6. pull rope, 7. anti-slip barb, 8. fastening slide, 9. sliding hole, 10. elastic rope, 11. clustering plate, 12. clustering hole, 13. positioning hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specified, the relative arrangement of the components, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be fixed "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, process and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, process and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application. Embodiment 1:

[0023] like Figure 1 , 2 As shown in Figure 3, a brush-proof sheath structure that is easy to pull in and fix, includes a sheath piece 1 and an elastic rope loop 2. The sheath piece 1 is provided with a plurality of pieces. One end of the sheath piece 1 is provided with a through hole 3. The elastic rope loop 2 passes through each through hole 3 to form a ring structure. The inner side of the sheath piece 1 is provided with a sliding guide rail 4. The sliding guide rail 4 is slidably connected with a fixing ring 5. The fixing ring 5 passes through each sliding guide rail 4 to form a ring structure. The fixing ring 5 is provided with a pull rope 6. One end of the pull rope 6 is connected to the fixing ring 5, and the other end of the pull rope 6 passes through the elastic rope loop 2.

[0024] like Figure 1 , 3 As shown, the sheath piece 1 is connected with anti-skid barbs 7 , and a plurality of anti-skid barbs 7 are provided. The anti-skid barbs 7 are vertically arranged on the outer surface of the sheath piece 1 , and the anti-skid barbs 7 face one side of the fixing ring 5 .

[0025] like Figure 3 As shown, a fastening slide bar 8 is connected inside the sliding guide rail 4, one side of the fastening slide bar 8 is a smooth surface, and the other side of the fastening slide bar 8 is an undulating curved surface. The fastening slide bar 8 is connected to the inner side of the sliding guide rail 4, and the fixing ring 5 is slidably connected to the curved surface side of the fastening slide bar 8. The sheath piece 1 is provided with a sliding hole 9, which is connected to the sliding guide rail 4. One end of the pull rope 6 passes through the sliding hole 9 and is connected to the fixing ring 5, and the other end of the pull rope 6 passes through the sliding hole 9 and extends out of the elastic rope ring 2.

[0026] like Figure 2 , 3 As shown, the sheath piece 1 is provided with an elastic rope 10, one end of the elastic rope 10 is connected to the inner wall of the sheath piece 1, and the other end of the elastic rope 10 is connected to a clustering plate 11, and the clustering plate 11 is provided with a clustering hole 12, and the pull rope 6 passes through the clustering hole 12.

[0027] like Figure 1 , 3 As shown, the clustering plate 11 is provided with positioning holes 13 .

[0028] like Figure 1-3 As shown: the sheath sheet 1 is a six-piece arc-shaped sheet structure that forms the anti-brush sheath as a whole, and the elastic rope loop 2 is connected with the six through holes 3 to form a ring shape.

[0029] Six bunching holes 12 are provided on the bunching plate 11 at positions corresponding to the sliding holes 9, so that the six pull ropes 6 pass through the bunching holes 12 and are arranged. The tail ends of the bunching holes 12 can be gathered into a bundle to facilitate more uniform pulling force.

[0030] In this embodiment, the bone tunnel structure described above takes the full-interior reconstruction technique as an example. According to the principle of "bungee effect" and "windshield wiper effect", the closer the fixing point is to the opening position of the bone tunnel joint, the less obvious the effect is. Therefore, if a support and stabilization device can be placed in the "wine glass"-shaped bone fossa of the tibia and femur ends, the "bungee effect" and "windshield wiper effect" can be eliminated. However, since the femoral and tibial bone tunnels are "blind-end" bone tunnels, the compression screws are not allowed to enter the bone tunnels antegradely. If the compression screws are used, they need to be operated in the joint, especially the tibial bone tunnel. Retrograde compression screw fixation not only requires the expansion of the surgical wound, but also the operation is reversed, which is not conducive to the operator's operation. Therefore, the fixed structure has high applicability in the "blind end" with only a small opening formed by the semi-tunnel of the full-interior technique. Specifically, the main body of the fixed structure can be placed in the large-diameter bone tunnel, and the pull rope 6 passes through the small opening to connect the suspension knot.

[0031] When in use: select the length of the anti-brush sheath suitable for the length and diameter of the bone channel, connect the graft traction line to the end of the graft, put one end of the graft into the space enclosed by the sheath piece 1, and pass the graft traction line through the positioning hole 13. Extend the fixed structure into the pre-drilled full-internal reconstruction bone channel, pass the pull rope 6 and the graft traction line through the small hole of the bone channel and out of the outside of the bone, tighten the elastic rope loop at one end of each sheath piece 1 to facilitate the case to enter the bone channel, form a wrapped state for the graft until it enters the bone channel and reaches a predetermined position, pull the pull rope 6, the main body of the anti-brush sheath is restricted by the small hole, and the fixing ring 5 moves relatively in the sliding guide rail 4. The fixing ring 5 climbs along the curve of the fastening slide bar 8 during movement and gradually pushes outward, so that the anti-slip barb is more sufficiently fixed on the wall of the bone channel, thereby realizing the fixing of the main body of the anti-brush sheath in the bone channel, and the tail ends of the pull rope 6 and the graft traction line are tied together on the suspension steel plate connected to the outside of the bone, realizing the anti-brush fixation of the graft in the bone channel.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brush-proof sheath structure that is easy to pull in and fix, characterized in that: The invention comprises a sheath piece (1) and an elastic rope loop (2), wherein the sheath piece (1) is provided with a plurality of pieces, each of which is provided with a through hole (3) at one end, and the elastic rope loop (2) passes through each through hole (3) to form a ring-shaped structure, and a sliding guide rail (4) is provided on the inner side of the sheath piece (1), and the sliding guide rail (4) is slidably connected with a fixing ring (5), and the fixing ring (5) passes through each sliding guide rail (4) to form a ring-shaped structure, and the fixing ring (5) is provided with a drawstring (6), one end of the drawstring (6) is connected to the fixing ring (5), and the other end of the drawstring (6) passes through the elastic rope loop (2).

2. The anti-brush sheath structure that is easy to pull in and fix according to claim 1 is characterized in that: The sheath piece (1) is connected with an anti-slip barb (7), a plurality of the anti-slip barbs (7) are provided, the anti-slip barbs (7) are vertically arranged on the outer surface of the sheath piece (1), and the anti-slip barbs (7) face one side of the fixing ring (5).

3. The anti-brush sheath structure that is easy to pull in and fix according to claim 2 is characterized in that: A fastening slide bar (8) is connected inside the sliding guide rail (4); one side of the fastening slide bar (8) is a smooth surface, and the other side of the fastening slide bar (8) is an undulating curved surface; the fastening slide bar (8) is connected to the inner side of the sliding guide rail (4), and the fixing ring (5) is slidably connected to the curved surface side of the fastening slide bar (8).

4. The anti-brush sheath structure that is easy to pull in and fix according to claim 3 is characterized in that: The sheath piece (1) is provided with a sliding hole (9), the sliding hole (9) is connected to the sliding guide rail (4), one end of the pull rope (6) passes through the sliding hole (9) and is connected to the fixing ring (5), and the other end of the pull rope (6) passes through the sliding hole (9) and extends out of the elastic rope loop (2).

5. The anti-brush sheath structure that is easy to pull in and fix according to claim 4 is characterized in that: The sheath piece (1) is provided with an elastic rope (10), one end of the elastic rope (10) is connected to the inner wall of the sheath piece (1), the other end of the elastic rope (10) is connected to a clustering plate (11), the clustering plate (11) is provided with a clustering hole (12), and the pull rope (6) passes through the clustering hole (12).

6. The anti-brush sheath structure that is easy to pull in and fix according to claim 5 is characterized in that: The clustering plate (11) is provided with a positioning hole (13).

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