A suture fixation device based on anterior cruciate ligament reconstruction

Abstract

The utility model provides a kind of suture fixation device based on anterior cruciate ligament reconstruction, including flexible hollow sheath, the first end of sheath is provided with filler, the mobile end of filler is connected with traction line, and the hollow space of sheath is drawn out by the second end of sheath by traction line, wherein, when the second end of sheath is pulled to sheath by traction line, filler can be filled in the hollow space of sheath under traction, so that sheath can be inflatable fastened in target bone channel. The utility model can be inside the bone channel of the ligament implant fixation by the filling expansion of flexible sheath, can shorten the fixed point length of the ligament implant, reduce the micro-motion of the ligament implant in bone channel, and then the long-term fixation reliability of the ligament implant can be improved, and the treatment recovery effect is improved. And it can reduce the damage of fixed structure to original bone structure, and protect the strength of original bone structure. Flexible extrusion fastening between sheath and ligament implant can avoid the cutting damage of hard extrusion nail fixation to ligament implant, and protect the strength of ligament implant.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a suture fixation device based on anterior cruciate ligament reconstruction surgery. Background Technology

[0002] Anterior cruciate ligament (ACL) reconstruction is a surgical treatment to repair a ruptured ACL in the knee joint, restoring joint stability and motor function. This surgery typically uses autologous tendons (such as hamstring tendons), allogeneic tendons, or artificial ligaments to replace the damaged ligament. Using arthroscopic minimally invasive techniques, holes are drilled in the femur and tibia to create bone tunnels, through which the ligament is implanted and fixed at both ends to the femur and tibia, respectively.

[0003] In existing technologies, the fixation methods for implanted ligaments include: at the femoral end, suspension titanium plates are often used for fixation, with the fixation point at the lateral epicondyle; at the tibial end, interface screws are often used for compression fixation, with the fixation point at the distal tibia.

[0004] Compared to the native ACL, the implanted ligament needs to pass through an artificially constructed bone tunnel. With the movement of the knee joint, the implanted ligament will generate longitudinal micro-movements throughout the bone tunnel. The resulting repeated stretching and relaxation "bungee jumping effect" will cause the bone tunnel to widen, reduce the contact stability between the implanted ligament and the bone tunnel, and thus reduce the treatment and recovery effect of ACL reconstruction. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a suture fixation device based on anterior cruciate ligament reconstruction surgery to solve the problem that in the prior art, the implanted ligament will undergo longitudinal micro-movement in the bone tunnel with the movement of the knee joint, resulting in the expansion of the bone tunnel, reducing the contact stability between the implanted ligament and the bone tunnel, and thus reducing the treatment and recovery effect of anterior cruciate ligament reconstruction surgery.

[0006] This invention provides a suture fixation device based on anterior cruciate ligament reconstruction, comprising: a sheath, the sheath being a flexible hollow structure, the first end of the sheath being open and provided with a filler, the movable end of the filler being connected to a traction suture, the traction suture passing through the hollow space of the sheath and being led out from the second end of the sheath, wherein, when the traction suture is pulled outward toward the second end of the sheath, the filler can be filled into the hollow space of the sheath under traction, so that the sheath can expand and be fastened within the target bone tunnel.

[0007] Optionally, the entire stitch fixing device is made of woven fabric.

[0008] Optionally, the circumference of the inner wall of the first end of the sheath gradually increases from the inside to the outside along the extension direction of the sheath.

[0009] Optionally, the filler includes a transition section connected to the sheath and a functional section away from the sheath, and the weaving density of the transition section is less than the weaving density of the functional section.

[0010] Optionally, the filler is provided with at least two, and the movable end of each filler is an integral braided structure, and the traction line is an integral braided structure with the filler.

[0011] Optionally, the traction line is disposed at the connection portion of each of the fillers.

[0012] Optionally, the traction line is led out through the side wall of the sheath.

[0013] Optionally, the sheath is further provided with a positioning auxiliary line, which is extended from the first end of the sheath.

[0014] Optionally, the outer surface of the sheath is jacquard-formed with reinforcing ribs to increase the coefficient of friction of the outer surface of the sheath.

[0015] This invention provides a suture fixation device for anterior cruciate ligament reconstruction, comprising a flexible hollow sheath. A filler is located at the first end of the sheath, and a traction suture is connected to the movable end of the filler. The traction suture passes through the hollow space of the sheath and extends from the second end. When the traction suture is pulled outwards towards the second end of the sheath, the filler can fill the hollow space of the sheath under traction, allowing the sheath to expand and secure itself within the target bone tunnel. This suture fixation device, through the expansion of the flexible sheath, can fix the implanted ligament within the bone tunnel, shortening the fixation point length and reducing micromovement of the implanted ligament within the bone tunnel. This improves the long-term fixation reliability of the implanted ligament and enhances treatment recovery. Furthermore, it reduces damage to the original bone structure caused by the fixation structure, ensuring the strength of the original bone structure. The flexible compression and securing between the sheath and the implanted ligament avoids the cutting damage to the implanted ligament caused by rigid compression screws, ensuring the strength of the implanted ligament. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the suture fixing device in the first embodiment of the present utility model; Figure 2 This is a schematic diagram of the suture fixing device in the second embodiment of the present invention; Figure 3 This is a schematic diagram of the suture fixing device in the third embodiment of the present utility model; Figure 4 This is a schematic diagram of the suture fixing device in its functional state according to the first embodiment of the present invention; Figure 5 This is a schematic diagram of the suture fixing device placed in the bone tunnel in an embodiment of the present invention. Figure 6 This is a schematic diagram of the suture fixing device being fixed in the bone tunnel in an embodiment of the present invention.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] To address the problem in existing technologies where implanted ligaments experience longitudinal micro-movements within the bone tunnel during knee joint movement, leading to tunnel expansion and reduced contact stability between the implanted ligament and the bone tunnel, thus diminishing the therapeutic and recovery outcomes of anterior cruciate ligament (ACL) reconstruction, this invention provides a suture fixation device for ACL reconstruction. The device includes a flexible, hollow sheath with an open first end containing a filler. A traction suture is connected to the movable end of the filler, passing through the hollow space of the sheath and exiting from the second end. When the traction suture is pulled outwards towards the second end of the sheath, the filler fills the hollow space within the sheath under traction, allowing the sheath to expand and securely fasten within the target bone tunnel. This expansion of the flexible sheath effectively fixes the implanted ligament within the bone tunnel, shortening the fixation point length and reducing micro-movements within the bone tunnel. This improves the long-term fixation reliability of the implanted ligament and enhances the therapeutic and recovery outcomes. Furthermore, it reduces damage to the original bone structure caused by the fixation structure, preserving the strength of the original bone structure. The flexible compression and fastening between the sheath and the implanted ligament can avoid cutting damage to the implanted ligament caused by rigid compression pins, thus ensuring the strength of the implanted ligament.

[0022] Specifically, such as Figure 1 The diagram shown is a structural schematic of the suture fixation device according to the first embodiment of this utility model. It includes: a sheath 30, which is a flexible hollow structure. The first end of the sheath 30 is open and has a filler 20, allowing the filler 20 to be embedded into the sheath 30 from the first end. A traction wire 40 is connected to the movable end of the filler 20. The traction wire 40 passes through the hollow space of the sheath 30 and is led out from the second end of the sheath 30. When the traction wire 40 is pulled outwards towards the second end of the sheath 30, the filler 20 can be filled into the hollow space of the sheath 30 under traction, allowing the sheath 30 to expand and securely fasten within the target bone tunnel. The filling state is as follows: Figure 4 As shown.

[0023] The suture fixation device of this invention allows the fixation point of the implanted ligament to be set inside the bone tunnel, for example... Figure 5 and Figure 6 As shown, holes are drilled in the femur 60 and tibia 50 using a drilling tool to form a femoral tunnel 61 in the femur 60 and a tibial tunnel 51 in the tibia 50 for the implantation of the implantable ligament 70.

[0024] like Figure 5 As shown, one end of the implanted ligament 70 extends into the femoral tunnel 61, and a suture fixation device is placed between the implanted ligament 70 and the inner wall of the femoral tunnel 61. The traction suture 40 of this suture fixation device extends from the tibial tunnel 51 side. Similarly, the other end of the implanted ligament 70 extends into the tibial tunnel 51, and a suture fixation device is placed between the implanted ligament 70 and the inner wall of the tibial tunnel 51. The traction suture 40 of this suture fixation device also extends from the tibial tunnel 51 side.

[0025] After positioning, the two sets of traction sutures 40 of the two suture fixation devices are pulled on the side of the tibial bone tunnel 51. The traction sutures 40 can drive the filler to embed into the sheath 20, causing the sheath 20 to expand and pre-tighten, thus firmly fixing the implanted ligament 70 within the two bone tunnels. The final positioning effect is as follows: Figure 6 As shown, the positioning point can be close to the opposing side of the femur 60 and tibia 50. Compared with the bone tunnel method on the outside of the femur 60 and tibia 50 in the prior art, the fixation point of the implanted ligament 70 fixed by this utility model is closer to the fixation point of the original ACL, and the replacement effect is better.

[0026] Furthermore, the fixation point is close to the opposing surfaces of the femur 60 and tibia 50, which can effectively reduce the movement of the implanted ligament 70 within the bone tunnel, avoiding the "windshield wiper effect" and "bungee jumping effect" caused by titanium plate fixation, and preventing damage to the bone tunnel. Moreover, when the implanted ligament 70 is an autologous tendon (such as a hamstring tendon) or an allogeneic tendon, it can ensure direct contact between the tendon and the bone tunnel, promote bone-tendon integration, and improve treatment recovery.

[0027] To facilitate the connection of the various parts of the suture fixation device and to meet its flexibility requirements, in this embodiment, the entire suture fixation device is made of braided material, and the braided thread is made of the same material as the surgical suture.

[0028] To avoid the filler 20 being overly embedded, causing it to be pulled out from the second end of the sheath 30 and affecting the expansion effect, in the second embodiment, as... Figure 2 As shown, the traction line 40 extends through the side wall of the sheath 30, providing traction restraint. In an alternative embodiment, the second end of the sheath 30 may also be a closed structure, leaving only the space through which the traction line 40 passes, effectively avoiding the problem of traction over-extension of the filler 20.

[0029] To facilitate the insertion of the filler 20 into the sheath 30, in the third embodiment, as follows: Figure 3 As shown, the circumference of the inner wall of the first end of the sheath 30 gradually increases from the inside to the outside along the extension direction of the sheath 30, and from the cross-section, the distance between the inner walls gradually increases from bottom to top. Through the gradient design, the embedding action of the filler 20 into the sheath 30 can be guided, ensuring that the filler 20 can be embedded into the sheath 30 smoothly.

[0030] During the process of inserting the filler 20 into the sheath 30, the filler 20 will preferentially fold. To avoid the expansion of the folded portion hindering the insertion of the filler 20 into the sheath 30, such as... Figure 2 As shown, the filling body 20 also includes a transition section 21 connected to the sheath 30, and a functional section away from the sheath 30. The weaving density of the transition section 21 is less than that of the functional section. Specifically, the weaving density of the transition section 21 can be gradually varied.

[0031] To improve the expansion effect of the sheath 30, in this embodiment, two fillers 20 are provided, and the movable ends of each filler 20 are integrally woven structures, forming a U-shaped structure. The traction line 40 and the filler 20 are integrally woven structures, which facilitates ensuring the volume of the filler 20, ensuring the expansion effect after filling the sheath 30, and thus ensuring the expansion fixation effect. The number of fillers 20 is not limited to two; multiple fillers can be provided, depending on actual needs and weaving difficulty.

[0032] The integrated braided structure also ensures the fixation of the traction line 40 and the filler 20, preventing the traction line from being accidentally pulled out.

[0033] To ensure that the filler 20 can be evenly embedded in the sheath 30, the traction line 40 is provided at the connection part of each filler 20. Corresponding to the U-shaped filler 20 in this embodiment, the traction line 40 is provided in the middle of the U-shaped filler 20.

[0034] To prevent the suture fixation device from being pulled out of the bone tunnel when the traction suture 40 is pulled, in an optional embodiment, a positioning auxiliary line is also provided on the sheath 30. The positioning auxiliary line is led out from the first end of the sheath 30, extending from the femur 60 side, to position the sheath 30 within the bone tunnel and ensure reliable fixation. The arrangement of the positioning auxiliary line reduces the need for placement and positioning aids for the sheath 30, lowers the complexity of the surgical procedure, and improves surgical efficiency.

[0035] To improve the fixation effect of the suture fixation device within the bone tunnel, in an optional embodiment, the outer surface of the sheath 30 is formed with reinforcing ribs using a jacquard process to increase the friction coefficient of the outer surface of the sheath 30. The reinforcing ribs include at least one of warp reinforcing ribs and weft reinforcing ribs, and may also be a cross structure.

[0036] To ensure expansion and fixation, the radial dimension of the filler 20 embedded in the sheath 30 is generally larger than the radial dimension of the inner space of the sheath 30 when it is in a contracted state. The specific dimension needs to be selected according to the specific dimensions of the adapted bone tunnel and the implanted ligament. This application does not make any special restrictions on this.

[0037] This invention provides a suture fixation device for anterior cruciate ligament reconstruction, comprising a flexible hollow sheath. A filler is located at the first end of the sheath, and a traction suture is connected to the movable end of the filler. The traction suture passes through the hollow space of the sheath and extends from the second end. When the traction suture is pulled outwards towards the second end of the sheath, the filler can fill the hollow space of the sheath under traction, allowing the sheath to expand and secure itself within the target bone tunnel. This suture fixation device, through the expansion of the flexible sheath, can fix the implanted ligament within the bone tunnel, shortening the fixation point length and reducing micromovement of the implanted ligament within the bone tunnel. This improves the long-term fixation reliability of the implanted ligament and enhances treatment recovery. Furthermore, it reduces damage to the original bone structure caused by the fixation structure, ensuring the strength of the original bone structure. The flexible compression and securing between the sheath and the implanted ligament avoids the cutting damage to the implanted ligament caused by rigid compression screws, ensuring the strength of the implanted ligament.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A suture fixation device based on anterior cruciate ligament reconstruction, characterized in that, include: The sheath is a flexible hollow structure. The first end of the sheath is open and has a filler. The movable end of the filler is connected to a traction line. The traction line passes through the hollow space of the sheath and is led out from the second end of the sheath. When the traction line is pulled outward from the second end of the sheath, the filler can be filled into the hollow space of the sheath under traction, so that the sheath can expand and be fastened in the target bone tunnel.

2. The suture fixation device based on anterior cruciate ligament reconstruction as described in claim 1, characterized in that, The entire suture fixing device is made of woven fabric.

3. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The circumference of the inner wall of the first end of the sheath gradually increases from the inside to the outside along the extension direction of the sheath.

4. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The filling material includes a transition section connected to the sheath and a functional section away from the sheath, wherein the weaving density of the transition section is less than the weaving density of the functional section.

5. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The filler is provided with at least two, and the movable end of each filler is an integral braided structure, and the traction line is an integral braided structure with the filler.

6. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 5, characterized in that, The traction line is located at the connection point of each of the fillers.

7. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The traction line is led out through the side wall of the sheath.

8. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The sheath is also provided with a positioning auxiliary line, which is led out from the first end of the sheath.

9. The suture fixation device based on anterior cruciate ligament reconstruction according to claim 1, characterized in that, The outer surface of the sheath is jacquard-formed with reinforcing ribs to increase the coefficient of friction of the outer surface of the sheath.

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