Full-suture meniscus fixation device and its tightening method

Abstract

This invention relates to the field of medical device technology, specifically disclosing a fully sutured meniscus fixation device and its tightening method. The fully sutured meniscus fixation device includes two fixation elements and a suture. The fixation elements have a first elongated state and a second annular state. The suture passes through the two fixation elements in the first state, with both ends of the suture located on the same fixation element. Two connecting segments are formed between the two fixation elements, each exiting from a different position on the same fixation element in the second state. The suture is configured such that during the tightening process at one end, both fixation elements deform from the first state to the second state. This configuration ensures that the annular fixation element conforms to the outer surface of the meniscus, preventing it from shrinking and standing up. The flat shape of the fixation element reduces friction with adjacent articular cartilage or surrounding soft tissue, lowering the risk of cartilage wear or even inflammation around the implant, reducing foreign body sensation, and improving user comfort.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a full-suture meniscus fixation device and its tightening method. Background Technology

[0002] Meniscus injury is one of the most common knee joint disorders in sports medicine. For severe injuries such as longitudinal tears or avulsions at the root of the meniscus located in the red zone (a region with good blood supply), the mainstream clinical treatment is anatomical reduction and repair using suture fixation techniques. In recent years, total suture fixation devices have gradually become a research hotspot and a new clinical option in this field due to their unique advantages.

[0003] Existing suture-based meniscus fixation devices generally consist of high-strength sutures and connected braided sleeves (i.e., fixation elements). During surgery, the surgeon uses a specialized implanter to puncture the meniscus and pushes two suture-connected braided sleeves sequentially onto the lateral surface of the meniscus. Subsequently, by tightening the sutures, the braided sleeves are forced to deform and stack, thus forming anchoring points on the meniscus surface, achieving pressure fixation of the torn tissue. However, in practice, the following problems have been found with existing suture-based fixation devices and their usage methods: First, the abrupt knot shape poses a risk of friction and inflammation. With existing devices, after the sutures are tightened, the braided sleeve typically forms an "Ω"-shaped or mushroom-shaped protrusion on the lateral surface of the meniscus. This protruding knot shape is highly susceptible to friction with adjacent articular cartilage or surrounding soft tissues during frequent flexion and extension movements of the knee joint. Over time, this can lead to cartilage wear and may also induce chronic inflammation around the implant.

[0004] Secondly, the foreign body sensation is obvious, affecting the recovery experience. Because the aforementioned "Ω"-shaped structure protrudes high from the surface of the meniscus, patients can clearly feel the presence of the implant in their body when moving after surgery, resulting in a significant foreign body sensation and discomfort.

[0005] Therefore, it is urgent to study a fully sutured meniscus fixation device and its tightening method to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a fully sutured meniscus fixation device and its tightening method, so as to solve the problems of friction and inflammation risks and the impact on rehabilitation experience caused by the existing fully sutured meniscus fixation device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A fully sutured meniscus fixation device includes two fixation elements and a suture. The fixation elements have a first state in the shape of an elongated strip and a second state in the shape of an annulus. The suture passes through the two fixation elements in the first state, and both ends of the suture are located on the same fixation element. Two connecting segments are formed between the two fixation elements, and each connecting segment passes through a different position of the fixation element in the second state. The suture is configured such that during the tightening process at one end, both fixation elements deform from the first state to the second state.

[0008] As an optional technical solution for a fully sutured meniscus fixation device, the two fixing objects are a first fixing member and a second fixing member. The two ends of the first fixing member are a first front end and a first rear end, respectively. The first fixing member is provided with a first front hole and a first rear hole at intervals along its own length. The two ends of the second fixing member are a second front end and a second rear end, respectively. The second fixing member is provided with a second front hole and a second rear hole at intervals along its own length. One end of the suture is sequentially passed through the first front hole, the first rear end, the first front end, the first front hole, the second front hole, the second front end, the second rear end, the second rear hole, the first rear hole, and the first front hole.

[0009] As an optional technical solution for a fully sutured meniscus fixation device, when the first fixation member is in the first state, the distance between the first front hole and the first rear hole is half the length of the first fixation member; and / or, When the second fastener is in the first state, the distance between the second front hole and the second rear hole is half the length of the second fastener.

[0010] As an optional technical solution for a fully sutured meniscus fixation device, the first fixing member has a first front hole located one-quarter of the distance from the first front end along its own length, and a first rear hole located one-quarter of the distance from the first rear end along its own length; and / or, The second fastener has a second front hole located one-quarter of the distance from the second front end along its own length direction, and a second rear hole located one-quarter of the distance from the second rear end along its own length direction.

[0011] As an optional technical solution for a fully sutured meniscus fixation device, the suture passes through the first front hole into the first fixation member and exits from the first rear end, wherein a first reserved section is formed in the first fixation member, the suture passes through the first rear hole into the first fixation member and exits from the first front hole, and a second reserved section is formed in the first fixation member, wherein the second reserved section is at least partially inserted inside the first reserved section.

[0012] As an optional technical solution for a fully sutured meniscus fixation device, the radial cross-section of the first fixation member is circular, and the suture can be inserted from the center position of the first front end and exited from the center position of the first rear end.

[0013] As an optional technical solution for a fully sutured meniscus fixation device, the other end of the suture is threaded back into the fixation device and forms a fixation knot.

[0014] As an optional technical solution for a fully sutured meniscus fixation device, the fixation device is a cylindrical structure with an internal channel, and the suture passes through the internal channel.

[0015] As an optional technical solution for a fully sutured meniscus fixation device, the fixation material is made of woven threads.

[0016] The tightening method for the full-suture meniscus fixation device, applicable to the full-suture meniscus fixation device described in any of the above technical solutions, includes the following steps: First shrink the fastener without the suture end, then shrink the fastener with the suture end.

[0017] The present invention has at least the following beneficial effects: This invention provides a fully sutured meniscus fixation device and its tightening method. The fully sutured meniscus fixation device includes two fixation objects and a suture. The fixation objects have a first state in the shape of an elongated strip and a second state in the shape of an annulus. The suture passes through the two fixation objects in the first state, and both ends of the suture are located on the same fixation object. Two connecting segments are formed between the two fixation objects. Each connecting segment passes through a different position of the fixation object in the second state. The suture is configured such that during the tightening process at one end, both fixation objects are deformed from the first state to the second state.

[0018] With the aforementioned structural design, the fixation device forms a ring shape after deformation. Because the connecting segments emerge from different positions within the same second-state fixation device, the entire ring-shaped surface of the fixation device adheres closely to the lateral surface of the meniscus, preventing it from shrinking and clumping together. This flattened shape reduces friction with adjacent articular cartilage or surrounding soft tissues, lowering the risk of cartilage wear or even peri-implant inflammation. Furthermore, patients will not notice the presence of the implant during postoperative activity, reducing the feeling of a foreign body and improving comfort. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the fully sutured meniscus fixation device in its first state in an embodiment of the present invention; Figure 2 This is a schematic diagram of the suture path of the fully sutured meniscus fixation device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the fully sutured meniscus fixation device in its second state in an embodiment of the present invention; Figure 4 This is a schematic diagram of the cooperation structure between the fully sutured meniscus fixation device and the meniscus in an embodiment of the present invention.

[0021] In the picture: 1000, Meniscus; 1100, Tear; 100. Fixed objects; 110. First fastener; 111. First front end; 112. First front hole; 113. First rear hole; 114. First rear end; 120. Second fastener; 121. Second front end; 122. Second front hole; 123. Second rear hole; 124. Second rear end; 200. Suture thread; 201. First free end; 202. Second free end; 210. Connecting segment; 211. First connecting segment; 212. Second connecting segment; 221. First loop; 222. Second loop; 230. Self-locking segment. Detailed Implementation

[0022] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0023] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0024] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0025] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0026] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0027] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0028] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0029] like Figures 1 to 4 As shown, this embodiment provides a fully sutured meniscus fixation device, which includes two fixation objects 100 and a suture 200. The fixation objects 100 have a first state of being elongated and a second state of being annular. The suture 200 passes through the two fixation objects 100 in the first state, and both ends of the suture 200 are located on the same fixation object 100. Two connecting segments 210 are formed between the two fixation objects 100. Each connecting segment 210 passes through a different position of the fixation object 100 in the same second state. The suture 200 is configured such that during the tightening process at one end, both fixation objects 100 deform from the first state to the second state.

[0030] With the aforementioned structural design, the fixation device 100 forms a ring shape after deformation. Since the connecting segments 210 protrude from different positions within the same second-state fixation device 100, the entire annular surface of the fixation device 100 adheres to the outer surface of the meniscus 1000, preventing it from shrinking and clumping together. This flattened shape reduces friction with adjacent articular cartilage or surrounding soft tissues, minimizing the risk of cartilage wear or even inflammation around the implant. Furthermore, patients will not notice the presence of the implant during postoperative activity, reducing the feeling of a foreign body and improving comfort.

[0031] It should be noted that, since the connecting segment 210 protrudes from different positions on the annular fixture 100, the line connecting the two protrusion points of the connecting segment 210 on the fixture 100 divides the fixture 100 into two parts. Thus, during the tightening process of the connecting segment 210, the two parts of the fixture 100 will be located on both sides of the line connecting the two protrusion points, and the fixture 100 will not be able to stand up. Therefore, when the connecting segment 210 is inserted into the meniscus 1000 and tightened, the fixture 100 in the second state can be flatly attached to the outer surface of the meniscus 1000.

[0032] To achieve sufficient contact between the suture 200 and the fixing object 100, and to reduce direct contact between the suture 200 and the meniscus 1000, in some embodiments, the two fixing objects 100 are a first fixing member 110 and a second fixing member 120, respectively. The two ends of the first fixing member 110 are a first front end 111 and a first rear end 114, respectively. The first fixing member 110 is provided with a first front hole 112 and a first rear hole 113 at intervals along its own length. The two ends of the second fixing member 120 are a second front end 121 and a second rear end 124, respectively. The second fixing member 120 is provided with a second front hole 122 and a second rear hole 123 at intervals along its own length. One end of the suture 200 is sequentially passed through the first front hole 112, the first rear end 114, the first front end 111, the first front hole 112, the second front hole 122, the second front end 121, the second rear end 124, the second rear hole 123, the first rear hole 113, and the first front hole 112. The axes of the first front hole 112 and the first rear hole 113 are parallel. The axes of the second front hole 122 and the second rear hole 123 are parallel. The specific threading path can be determined by referring to... Figure 2 As shown, the order of threading should follow the direction of the arrows, from ① to ⑩.

[0033] Specifically, the suture 200 exits from the first rear end 114 and enters from the first front end 111, forming a first loop 221 between the first rear end 114 and the first front end 111; the suture 200 exits from the first front hole 112 and enters from the second front hole 122, forming a first connecting segment 211 between the first front hole 112 and the second front hole 122; the suture 200 exits from the second front end 121 and enters from the second rear end 124, forming a second loop 222 between the second front end 121 and the second rear end 124; and the suture 200 exits from the second rear hole 123 and enters from the first rear hole 113, forming a second connecting segment 212 between the second rear hole 123 and the first rear hole 113. One end of the suture 200 that passes through the first front hole 112 can be defined as the first free end 201, and the other end of the suture 200 can be defined as the second free end 202. The section between the first free end 201 of the suture and the first fastener 110 is defined as the adjustment section. Pulling the adjustment section can deform the first fastener 110 and the second fastener 120; and by pulling the adjustment section, the first suture loop 221 shrinks and its length becomes zero, the first front end 111 and the first rear end 114 fit together, and the first fastener 110 is deformed from a strip shape into a ring shape; when the adjustment section is pulled, the second suture loop 222 also shrinks and its length becomes zero, the second front end 121 and the second rear end 124 fit together, and the second fastener 120 is deformed from a strip shape into a ring shape. At the same time, by pulling the adjustment section, the lengths of the first connecting section 211 and the second connecting section 212 can also be adjusted to accommodate menisci 1000 of different thicknesses.

[0034] In this embodiment, the second fixation member 120 is in a free sliding state on the suture 200, which allows the doctor to flexibly adjust the position of the second fixation member 120 by pulling the first free end 201 of the suture 200 according to the specific location of the tear 1100 of the meniscus 1000, the tissue thickness, and the repair tension requirements during the operation. This can meet the repair needs of different patients and different tear types, and avoid the inconvenience of operation or insecure fixation caused by the relative fixation of the second fixation member 120 and the suture 200.

[0035] Furthermore, with the aforementioned configuration, repair and fixation can be achieved with a smaller knot volume of the fixator 100. Specifically, the fixator 100 in the first state is small in volume, while the fixator 100 in the second state is large in volume, effectively reducing iatrogenic injury and the risk of dislodgement. Specifically, firstly, the smaller diameter of the fixator 100 in the first state results in a correspondingly smaller diameter of the puncture tube used for auxiliary implantation, leading to a smaller puncture channel formed on the meniscus 1000. This effectively reduces iatrogenic injury to the meniscus 1000, which lacks self-healing capabilities. Secondly, the smaller puncture channel, combined with the larger volume of the annular fixator 100 in the second state, significantly reduces the risk of the fixator 100 dislodging from the puncture channel, lowering the probability of dislodgement.

[0036] In other embodiments, the suture 200 first passes from one end of the fastener 100 to the other, wraps around and ties a knot, and then exits from a position other than the end of the fastener 100. As the suture 200 tightens, the fastener 100 also deforms into a loop shape. Simultaneously, the loop-shaped fastener 100 lies flat on the meniscus 1000. It should be noted that when the fastener 100 lies flat on the meniscus 1000, it means that after the loop-shaped fastener 100 is fixed to the meniscus 1000, the axis of the fastener 100 is perpendicular to the outer contact surface of the meniscus 1000; it can also be understood that the flat fastener 100 in this embodiment is perpendicular to the "Ω"-shaped fastener 100 in the prior art.

[0037] In some embodiments, when the first fastener 110 is in the first state, the distance between the first front hole 112 and the first rear hole 113 is half the length of the first fastener 110. This arrangement ensures that when the first fastener 110 is deformed into the second state, the first connecting segment 211 and the second connecting segment 212 are symmetrically arranged about the center of the annular first fastener 110. This allows the annular surface of the first fastener 110 to fit smoothly and tightly against the outer surface of the meniscus 1000, preventing skewing or warping due to uneven force distribution, and further ensuring the placement stability of the first fastener 110.

[0038] In some embodiments, when the second fastener 120 is in the first state, the distance between the second front hole 122 and the second rear hole 123 is half the length of the second fastener 120. This arrangement ensures that when the second fastener 120 is deformed into the second state, the first connecting segment 211 and the second connecting segment 212 are arranged symmetrically about the center of the annular second fastener 120, thereby allowing the second fastener 120 to lie flat on the meniscus 1000.

[0039] In some embodiments, when the first fastener 110 is in the first state, the distance between the first front hole 112 and the first rear hole 113 is half the length of the first fastener 110, and when the second fastener 120 is in the first state, the distance between the second front hole 122 and the second rear hole 123 is half the length of the second fastener 120.

[0040] Specifically, the first fixing member 110 has a first front hole 112 located one-quarter of the distance from the first front end 111 along its own length direction, and a first rear hole 113 located one-quarter of the distance from the first rear end 114 along its own length direction. This arrangement allows for control of the distance between the first connecting segment 211 and the second connecting segment 212. Furthermore, the one-quarter position facilitates observation and control, ensuring the proper insertion of the suture 200. Simultaneously, this position is relatively far from the end of the first fixing member 110, reducing the probability of suture insertion failure due to errors. Finally, since both the first connecting segment 211 and the second connecting segment 212 are located one-quarter of the distance from the first fixing member 110, when the first fixing member 110 deforms into its second annular state, the first connecting segment 211 and the second connecting segment 212 are symmetrical about the center of the first fixing member 110, resulting in uniform force distribution.

[0041] In other embodiments, the first fixing member 110 has a first front hole 112 located at a position two-tenths of the distance from the first front end 111 along its own length direction, and a first rear hole 113 located at a position three-tenths of the distance from the first rear end 114 along its own length direction. It is sufficient to ensure that the distance between the first front hole 112 and the first rear hole 113 is half the length of the first fixing member 110.

[0042] Similarly, the second fastener 120 is provided with a second front hole 122 at a position one-quarter of the distance from the second front end 121 along its own length direction, and the second fastener 120 is provided with a second rear hole 123 at a position one-quarter of the distance from the second rear end 124 along its own length direction.

[0043] In some embodiments, the first fixing member 110 is provided with a first front hole 112 at a quarter position from the first front end 111 along its own length direction, and the first fixing member 110 is provided with a first rear hole 113 at a quarter position from the first rear end 114 along its own length direction; the second fixing member 120 is provided with a second front hole 122 at a quarter position from the second front end 121 along its own length direction, and the second fixing member 120 is provided with a second rear hole 123 at a quarter position from the second rear end 124 along its own length direction.

[0044] In other embodiments, the suture 200 first passes from one end of the fixture 100 to the other end, wraps back and ties a knot, and then passes out from the middle part of the fixture 100, so that when the fixture 100 is deformed into a ring shape, the two connecting segments 210 of the suture 200 pass out from the fixture 100 at positions symmetrical about the center of the circle.

[0045] The suture 200 passes through the first front hole 112 into the first fastener 110 and exits through the first rear hole 114, wherein a first reserved section is formed in the first fastener 110, the suture 200 passes through the first rear hole 113 into the first fastener 110 and exits through the first front hole 112, and a second reserved section is formed in the first fastener 110, the second reserved section being at least partially inserted inside the first reserved section. The above configuration creates a self-locking section 230 with mutual friction between the first and second reserved sections. When the suture 200 is tightened, the self-locking section 230 undergoes tensile deformation, extending along the length of the suture 200 while contracting along the diameter, increasing the friction between the second and first reserved sections passing through the interior and creating a self-locking effect. After the external force of the pull disappears, it can prevent the first and second reserved sections from sliding against each other, achieving self-locking, reducing knotting, improving operational efficiency, and simplifying surgical procedures. At the same time, it has good anti-slippage and anti-loosening performance under the cyclic load generated by joint movement, ensuring the long-term reliability of fixation.

[0046] In other embodiments, the second reserved section can be inserted into and out of the first reserved section multiple times to increase the friction between the two and improve the anti-loosening effect.

[0047] Generally, the fixation device 100 is a woven structure, which has insufficient fatigue resistance and is prone to detachment and failure. Specifically, the ends of the existing fixation device 100 are usually in direct contact with the bone surface or the surface of the meniscus 1000, and are subjected to continuous compression and shear forces during knee joint movement. The unique structural characteristics of the woven fabric make it prone to fiber detachment starting from the stress-concentrated ends under long-term cyclic loading, leading to overall fixation failure. This poses a serious risk for implants that need to remain in the body for a long time and withstand high loads.

[0048] To address the aforementioned issues, in some embodiments, the fixation element 100 is made of woven threads. The woven material has a mesh structure, increasing friction with the meniscus 1000 and possessing deformability to conform to different shapes of the meniscus 1000. The first fixation element 110 has a circular radial cross-section, allowing the stitches 200 to enter from the center of the first front end 111 and exit from the center of the first rear end 114. This arrangement ensures that when the first fixation element 110 is tightened, the first front end 111 and the first rear end 114 abut against each other, preventing the weakest point of the woven structure from being directly exposed to the meniscus 1000 surface and avoiding direct friction with surrounding tissues. The two ends of the first fixation element 110 meet and abut against each other in the middle of the annular structure, concealing the easily detached woven ends between the two ends, preventing compression and friction caused by the high protrusion of the fixation element 100 during knee joint movement. This structural design significantly improves the fatigue resistance of the woven structure and solves the problem of woven structure detachment caused by long-term friction at the ends in the prior art.

[0049] In some embodiments, the second fastener 120 has a circular radial cross-section, and the stitch 200 can pass through from the center of the second front end 121 and enter from the center of the second rear end 124. In some embodiments, the first fastener 110 has a circular radial cross-section, and the stitch 200 can pass through from the center of the first front end 111 and exit from the center of the first rear end 114; the second fastener 120 has a circular radial cross-section, and the stitch 200 can pass through from the center of the second front end 121 and enter from the center of the second rear end 124.

[0050] The other end of the thread 200 is threaded back into the first fastener 110 and forms a fixing knot. Specifically, the other end of the thread 200 is wrapped around part of the fibers of the first fastener 110 and then threaded back into the first fastener 110, leaving the other end of the thread 200 inside the first fastener 110. In other words, the second free end 202 is threaded into the first fastener 110 beside the first front hole 112 to a depth equal to the diameter of the braid, then exits at another location, and finally re-threaded into the first fastener 110. This arrangement prevents the second free end 202 from retracting into the first fastener 110 when the first free end 201 is pulled out.

[0051] Specifically, the fastener 100 is a cylindrical structure with an internal channel through which the stitching 200 passes. The cylindrical structure provides a larger cross-sectional area or stiffness with the same amount of material. In other embodiments, the fastener 100 may be a solid structure.

[0052] In other embodiments, both the first fastener 110 and the second fastener 120 are cylindrical structures with internal channels through which the sewing thread 200 passes.

[0053] In some embodiments, the suture 200 is made of polyethylene material, such as ultra-high molecular weight polyethylene.

[0054] This embodiment also provides a tightening method for a fully sutured meniscus fixation device, applicable to the fully sutured meniscus fixation device in any of the above embodiments, comprising the following steps: First, the fastener 100 without the seam 200 end is contracted. After the fastener 100 without the seam 200 end is deformed from a strip shape into a ring shape, the fastener 100 with the seam 200 end is then contracted, so that the fastener 100 with the seam 200 end is deformed from a strip shape into a ring shape. In other words, the second fastener 120 is contracted first, and then the first fastener 110 is contracted. The contraction of the seam 200 between the two fasteners 100 can be performed before or after the first fastener 110 is deformed into a ring shape.

[0055] The insertion process of the full-suture meniscus fixation device includes two key operational steps: "pushing" and "tightening." During the pushing phase, the two fixation elements 100 are arranged sequentially within the implanter's puncture tube, with the first fixation element 110 in front (at its tip) and the second fixation element 120 behind. The first connecting segment 211 and the second connecting segment 212 between the first fixation element 110 and the second fixation element 120 have length margins in the pre-loaded state, allowing them to relax or slide freely. When the pushing mechanism pushes the first fixation element 110 forward, the first connecting segment 211 and the second connecting segment 212 only extend, without exerting substantial traction on the second fixation element 120; simultaneously, a suitable static friction is maintained between the fixation element 100 and the inner wall of the puncture tube, providing passive locking for the second fixation element 120. The above design together ensures that the first fastener 110 is pushed first and the second fastener 120 is pushed later, releasing them independently in sequence. This effectively solves the problems caused by the flexible nature of the full-stitch meniscus fixation device, such as inconsistent pushing states, the inability of the fastener 100 to be pushed out, or the second fastener being pushed out along with the first fastener.

[0056] Combination Figure 4 As shown, the first fastener 110 and the second fastener 120 of the full-suture meniscus fixation device are located outside the tear 1100 of the meniscus 1000, and a portion of the first connecting segment 211 and the second connecting segment 212 cross the tear 1100 and are partially located on the top of the meniscus 1000.

[0057] In other embodiments, the first fastener 110 and the second fastener 120 of the full-suture meniscus fixation device are located outside the tear 1100 of the meniscus 1000, i.e., the convex side of the arc, and a portion of the first connecting segment 211 and the second connecting segment 212 cross the tear 1100 and are located inside the meniscus 1000, i.e., the concave side of the arc.

[0058] During the tightening phase: the second loop 222 on the second fixation member 120 first contracts, causing the second fixation member 120 to contract into a loop, and then continues to pull the first loop 221 on the first fixation member 110, causing the first fixation member 110 to contract into a loop. The connection structure between the second fixation member 120 and the suture 200 is simple and efficient, and the suture 200 can be tightened smoothly. This step-by-step tightening method avoids problems such as difficulty in suture tightening, implant pull-out, or suture breakage caused by an overly complex interlacing structure between the suture 200 and the fixation object 100.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fully sutured meniscus fixation device, characterized in that, The device includes two fasteners (100) and a suture (200). The fasteners (100) have a first state in the shape of an elongated strip and a second state in the shape of a ring. The suture (200) passes through the two fasteners (100) in the first state, and both ends of the suture (200) are located on the same fastener (100). Two connecting segments (210) are formed between the two fasteners (100). Each connecting segment (210) passes through a different position of the same fastener (100) in the second state. The suture (200) is configured to tighten at one end, and both fasteners (100) are deformed from the first state to the second state.

2. The fully sutured meniscus fixation device according to claim 1, characterized in that, The two fasteners (100) are a first fastener (110) and a second fastener (120). The two ends of the first fastener (110) are a first front end (111) and a first rear end (114). The first fastener (110) is provided with a first front hole (112) and a first rear hole (113) at intervals along its own length. The two ends of the second fastener (120) are a second front end (121) and a second rear end (124). The second fastener (120) is provided with a second front hole (122) and a second rear hole (123) at intervals along its own length. One end of the suture (200) is sequentially passed through the first front hole (112), the first rear end (114), the first front end (111), the first front hole (112), the second front hole (122), the second front end (121), the second rear end (124), the second rear hole (123), the first rear hole (113), and the first front hole (112).

3. The full-suture meniscus fixation device according to claim 2, characterized in that, When the first fastener (110) is in the first state, the distance between the first front hole (112) and the first rear hole (113) is half the length of the first fastener (110); and / or, When the second fastener (120) is in the first state, the distance between the second front hole (122) and the second rear hole (123) is half the length of the second fastener (120).

4. The fully sutured meniscus fixation device according to claim 3, characterized in that, The first fixing member (110) has a first front hole (112) located one-quarter of the distance from the first front end (111) along its own length direction, and a first rear hole (113) located one-quarter of the distance from the first rear end (114) along its own length direction; and / or, The second fastener (120) has a second front hole (122) located one-quarter of the distance from the second front end (121) along its own length direction, and a second rear hole (123) located one-quarter of the distance from the second rear end (124) along its own length direction.

5. The full-suture meniscus fixation device according to claim 2, characterized in that, The suture (200) passes through the first front hole (112) into the first fastener (110) and exits from the first rear end (114), wherein a first reserved section is formed in the first fastener (110), the suture (200) passes through the first rear hole (113) into the first fastener (110) and exits from the first front hole (112), and a second reserved section is formed in the first fastener (110), the second reserved section being at least partially inserted inside the first reserved section.

6. The fully sutured meniscus fixation device according to claim 2, characterized in that, The first fastener (110) has a circular radial cross section, and the suture (200) can be inserted from the center of the first front end (111) and exit from the center of the first rear end (114).

7. The full-suture meniscus fixation device according to claim 1, characterized in that, The other end of the suture (200) is threaded back into the fastener (100) and forms a fixed knot.

8. The fully sutured meniscus fixation device according to any one of claims 1-7, characterized in that, The fixing element (100) has a cylindrical structure and an internal channel, through which the suture (200) passes.

9. The fully sutured meniscus fixation device according to any one of claims 1-7, characterized in that, The fixture (100) is made of woven lines.

10. A tightening method for a fully sutured meniscus fixation device, applicable to the fully sutured meniscus fixation device according to any one of claims 1-9, characterized in that, Includes the following steps: First shrink the fastener (100) without the suture (200) end, then shrink the fastener (100) with the suture (200) end.

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