Knotless suture anchor and implantation instrument

Abstract

The application provides a knot-free suture anchor and implanting device, relates to the technical field of medical devices, and aims to solve the problem that traditional metal anchors and polymer material anchors need to be manually knotted during implantation, and provides a knot-free anchor structure made of suture and related implanting device. The knot-free suture anchor comprises a deformation sleeve, a suture and a traction line, the deformation sleeve is a hollow structure, the suture is arranged in the deformation sleeve, the suture comprises a sliding end and a fixed end, the sliding end is connected with the fixed end and forms a ring structure arranged on the deformation sleeve, a traction sleeve is further arranged on the suture, the traction line is arranged in the deformation sleeve through the traction sleeve, and one end of the traction line located outside the deformation sleeve is provided with a traction ring through which the sliding end of the suture passes; when the sliding end is pulled, the deformation sleeve is contracted and deformed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a knotless suture anchor and implantation device. Background Technology

[0002] When orthopedic surgeons encounter patients with injuries between bones, between bones and cartilage, or between bones and soft tissues, they typically treat them surgically by implanting anchors and sutures, or by using sutures alone. Anchors are usually made of metal or polymer materials.

[0003] When the implanted anchors are made of metal, it may cause some inconvenience for patients entering and exiting security gates. Furthermore, anchors made of these materials require drilling into the bone marrow tract during implantation, which can cause some damage to the bone during the procedure. Most importantly, these anchors require knotting to secure them to the relevant tissues, which is not only cumbersome but also creates protruding knots at the site of fixation. While this fixation method is effective, the protruding knots can rub against the surrounding tissues during joint movement, causing inflammation, and in severe cases, even leading to surgical failure.

[0004] To address the aforementioned issues, reduce the difficulty of anchor implantation and damage to human bones, and avoid postoperative inflammation, it is necessary to develop a new type of knot-free suture anchor and implantation device. Summary of the Invention

[0005] The purpose of this invention is to provide knotless suture anchors and implantation devices to solve the problem that traditional anchors require knotting for fixation, and protruding knots can easily cause inflammation. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a knotless suture anchor, comprising a deformable sleeve, a suture thread, and a traction thread. The deformable sleeve has a hollow structure. The suture thread passes through the deformable sleeve and includes a sliding end and a fixed end. The sliding end is connected to the fixed end and forms an annular structure passing through the deformable sleeve. A traction sleeve is also provided on the suture thread. The traction thread passes through the traction sleeve inside the deformable sleeve, and one end of the traction thread outside the deformable sleeve is provided with a traction ring that allows the sliding end of the suture thread to pass through. When the sliding end is pulled, the deformable sleeve contracts and deforms.

[0008] The aforementioned deformable sleeve deforms as the sliding end of the suture tightens, ultimately forming an anchor point by tightening into a ball and interfering with the bone tunnel. Frictional force enables knot-free fixation. The aforementioned traction suture can be withdrawn and tightened at its sliding end to firmly fix the bone, soft tissue, or cartilage structure to be fixed onto another bone structure. The entire process eliminates the need for knots, thus avoiding postoperative inflammation caused by knots and aiding in postoperative recovery. This anchor structure offers advantages such as improved surgical efficiency and reduced risk of rejection.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] As a further improvement of the present invention, one end of the suture is provided with a loop and the loop is located outside the deformable sleeve. The sliding end of the suture passes through the deformable sleeve and then enters the loop to form the annular structure.

[0011] The above structure can be used to form a ring structure that helps the deformable sleeve deform and tighten into a ball.

[0012] As a further improvement of the present invention, a perforation is provided around the end of the fixed end, and the end of the fixed end is inserted into the perforation to form the loop.

[0013] As a further improvement of the present invention, the traction sleeve is formed in the portion of the suture located within the deformable sleeve.

[0014] As a further improvement of the present invention, a fixed sleeve is formed on the suture line, and the sliding end of the suture line that passes through the deformable sleeve is connected to the fixed end through the fixed sleeve to form the annular structure.

[0015] As a further improvement of the present invention, the fixing sleeve is formed on the portion of the suture located inside the deformable sleeve.

[0016] As a further improvement of the present invention, the traction sleeve is formed on the portion of the suture located outside the deformable sleeve and near the fixed end.

[0017] As a further improvement of the present invention, the deformable sleeve is a columnar sleeve woven from flexible yarn.

[0018] The present invention also provides an implantation device, including the knotless suture anchor as described in any of the above claims, and further including an implanter, the implanter including a fixed handle, an insert rod and a positioning rod arranged coaxially, the fixed handle being a cylindrical structure with an internal cavity, one end of the insert rod being inserted into the fixed handle, and the other end being fitted with the positioning rod on its outer periphery, with its end forming an installation part for installing the knotless suture anchor; the fixed handle and the positioning rod are connected.

[0019] The implanter is used to implant and fix the aforementioned anchors. The positioning rod can achieve the positioning function during the anchor implantation process, eliminating the need for additional positioning devices for installation.

[0020] As a further improvement of the present invention, the fixed handle includes a main handle and a secondary handle connected by threads. The secondary handle is located on the side of the main handle opposite to the positioning rod and is partially inserted into the main handle. The inner rod is fitted with a retaining ring, which is located inside the main handle and can abut against the secondary handle.

[0021] The aforementioned fixing handle includes a threaded main handle and a secondary handle, and the insert rod includes a metal rod. When using this implant, the relative position between the metal rod and the main handle can be adjusted by turning the main handle to eject the metal rod.

[0022] Compared with the prior art, the preferred embodiment of the present invention provides the following beneficial effects:

[0023] This knotless suture anchor causes minimal damage to the bone during fixation. Furthermore, its structure utilizes a deformable sleeve to effectively secure the anchor to the bone tunnel, significantly reducing the risk of loosening. Additionally, the knotless nature of this anchor simplifies the surgical procedure and eliminates protruding knots at the fixation site, resulting in a more aesthetically pleasing surgical site and effectively reducing the possibility of postoperative rejection or inflammation. Moreover, the knotless suture anchor is entirely made of suture, avoiding the inconvenience of using traditional metal anchors through security gates. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the knotless seam anchor of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 3 This is a schematic diagram of the overall structure of another embodiment of the knotless seam anchor of the present invention;

[0028] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure;

[0029] Figure 5 This is a schematic diagram of the implanter in the implantation device of the present invention;

[0030] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure;

[0031] Figure 7 yes Figure 5 Exploded view.

[0032] In the diagram: 1. Deformation sleeve; 2. Suture thread; 21. Sliding end; 22. Fixed end; 221. Thread loop; 222. Perforation; 23. Traction sleeve; 24. Fixed sleeve; 3. Traction thread; 31. Traction ring; 4. Fixed handle; 41. Main handle; 42. Secondary handle; 5. Insert inner rod; 51. Metal rod; 52. Buckle; 6. Positioning rod; 7. Snap ring. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings:

[0037] This invention provides a knotless suture anchor, the entire structure of which is woven from sutures, including a deformable sleeve 1, a suture 2, and a traction thread 3. The suture 2 is used to pull the deformable sleeve 1 to deform, thereby causing the anchor to form an anchor point within the corresponding bone tunnel in a deformed form, ultimately achieving knotless fixation. The traction thread 3 is used to pull the suture 2 that bypasses the tissue to be fixed and to make it pass through the deformable sleeve 1 again. Knotless fixation of the tissue to be fixed can be achieved by tightening both ends of the suture 2.

[0038] Specifically, the aforementioned deformable sleeve 1 has a hollow structure, and the suture 2 is inserted inside the deformable sleeve 1. The suture 2 includes a sliding end 21 and a fixed end 22. The sliding end 21 is connected to the fixed end 22 and forms a ring structure on the deformable sleeve 1. The aforementioned suture 2 is also provided with a traction sleeve 23. The traction suture 3 passes through the traction sleeve 23 inside the deformable sleeve 1, and the end of the traction suture 3 outside the deformable sleeve 1 is provided with a traction ring 31 that allows the sliding end 21 of the suture 2 to pass through. In use, pulling the aforementioned sliding end 21 can cause the deformable sleeve 1 to contract and deform, thereby completing the fixation of the anchor. After the anchor is fixed, the sliding end 21 of the suture 2, which bypasses the tissue to be fixed, is inserted into the aforementioned traction ring 31. By pulling the traction suture 3, the traction ring 31 pulls the sliding end 21 of the suture 2 out of the aforementioned deformable sleeve 1. By tightening the aforementioned suture 2, the tissue to be fixed is firmly fixed. Finally, the excess suture 2 is cut off.

[0039] The aforementioned deformable sleeve 1 deforms as the sliding end 21 of the suture 2 tightens, ultimately forming an anchor point by tightening into a ball and interfering with the bone tunnel. Frictional force enables knot-free fixation. The aforementioned traction suture 3 can be withdrawn and the sliding end 21 of the suture 2 tightened to firmly fix the bone, soft tissue, or cartilage structure to be fixed onto another bone structure. The entire process does not require knotting, thus avoiding postoperative inflammation caused by knots and aiding in postoperative recovery. This anchor structure has the advantages of improving surgical efficiency and reducing the risk of rejection.

[0040] It should be noted that the above-mentioned deformable sleeve 1 is a cylindrical sleeve structure made of flexible woven threads, which can be either flat or round.

[0041] When installed into the bone tunnel, the two ends of the aforementioned deformable sleeve 1 are bent into a U-shape or similar structure. Finally, with the stretching and deformation of the suture 2, a raised clump-like structure is formed and fixed in the bone tunnel by an interference fit.

[0042] This knotless suture anchor causes minimal damage to the bone during fixation. Furthermore, its structure utilizes a deformable sleeve 1 to effectively secure the anchor to the bone tunnel, significantly reducing the risk of loosening. Additionally, the knotless nature of this anchor simplifies surgical procedures and eliminates protruding knots at the fixation site, resulting in a more aesthetically pleasing surgical site and effectively reducing the possibility of postoperative rejection or inflammation. Moreover, the knotless suture anchor is entirely made of suture, avoiding the inconvenience of using traditional metal anchors through security gates.

[0043] Example 1:

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a knotless suture anchor, including a deformation sleeve 1, a suture 2, and a traction line 3. One end of the suture 2 is provided with a suture loop 221, which is located outside the deformation sleeve 1. The sliding end 21 of the suture 2 passes through the deformation sleeve 1 and then passes into the suture loop 221 to form a ring structure.

[0045] When the sliding end 21 of the above-mentioned suture 2 is pulled, the sliding end 21 can pull the annular structure to tighten and drive the deformation sleeve 1 to deform into a ball.

[0046] Specifically, the aforementioned loop 221 is made of a fixed end 22 and a perforation 222 formed around the fixed end 22. The perforation 222 is provided around the end of the fixed end 22, and when the end of the fixed end 22 is inserted into the perforation 222 and fixed, the aforementioned loop 221 can be formed.

[0047] Alternatively, the end of the fixed end 22 can be itself the structure of the above-mentioned loop 221.

[0048] In use, the traction wire 3 passes through the sliding end 21 onto the deformable sleeve 1 and extends outside the deformable sleeve 1. The extended portion passes through the aforementioned wire loop 221 and connects to the fixed end 22. During the operation, the deformable sleeve 1 can be squeezed and deformed by pulling the aforementioned sliding end 21, changing it from a U-shape to a spherical or lumpy structure to form an anchor point.

[0049] In this embodiment and other similar embodiments, the traction sleeve 23 is formed on the portion of the suture 2 located inside the deformation sleeve 1, and the traction 3 passes through the traction sleeve 23 on the suture 2 and is partially located inside the deformation sleeve 1.

[0050] During tissue fixation, the sliding end 21 of the suture 2 can be pulled by the traction suture 3 to re-enter the deformable sleeve 1 and travel along the path inside the deformable sleeve 1 and the traction sleeve 23, and then be led out from the other end of the deformable sleeve 1. At this time, the traction suture 3 can be removed. Finally, the tissue to be fixed is firmly fixed by tightening the suture 2, and then the excess suture 2 is cut off.

[0051] In this embodiment and other similar embodiments, the suture 2 and traction 3 can be a strip structure with a circular cross-section, or a flat strip structure with a flat cross-section, or a strip structure with a circular cross-section for some parts and a flat cross-section for others, thereby meeting different surgical fixation needs.

[0052] Compared to traditional knot-tying fixation methods, this structure can tighten itself through the suture 2 to fix and repair related tissues without the need for knotting. This avoids or reduces the formation of connective tissue "sacs" due to the body's immune response during the postoperative recovery period, lowers the chance of inflammation, and reduces the body's rejection reaction. Because knots are not required, it can help shorten the operation time and improve surgical efficiency; once the deformable sleeve 1 forms an anchor point, its fixation strength is high.

[0053] Example 2:

[0054] The difference between this embodiment 2 and embodiment 1 is that the structure of the suture 2 is different, and correspondingly, the way the ring structure is formed is also different.

[0055] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, a fixed sleeve 24 is formed on the suture 2. The sliding end 21 passes through the deformable sleeve 1 and is inserted into the fixed sleeve 24 to connect with the fixed end 22 and pass through the deformable sleeve 1 again, thereby cooperating with the deformable sleeve 1 to form the above-mentioned annular structure.

[0056] Similarly, when the sliding end 21 of the suture 2 is pulled, the annular structure can tighten and cause the deformation sleeve 1 to deform into a ball.

[0057] Specifically, the aforementioned fixing sleeve 24 is formed in the portion of the suture 2 located inside the deformable sleeve 1.

[0058] In this embodiment and other similar embodiments, to facilitate the passage of the suture 2, the two ends of the aforementioned fixing sleeve 24 can be set to extend slightly relative to the deformable sleeve 1, such as... Figure 3 As shown.

[0059] Considering the existence of the aforementioned fixing sleeve 24, in order to avoid affecting the normal pulling of the traction line 3, the aforementioned traction sleeve 23 is set on the part of the suture line 2 located outside the deformation sleeve 1.

[0060] Specifically, the traction sleeve 23 is formed on the portion of the suture 2 located outside the deformable sleeve 1 and is positioned near the fixed end 22.

[0061] During tissue fixation, the sliding end 21 of the suture 2, pulled by the traction suture 3, re-enters the deformable sleeve 1 and travels along the path within it. After exiting from the other end of the deformable sleeve 1, it re-enters the aforementioned traction sleeve 23 and travels along the path within it until it exits. At this point, the traction suture 3 can be removed. Finally, the tissue to be fixed is firmly secured by tightening the suture 2, and then excess suture 2 is cut off.

[0062] The specific shape and size of the traction suture 3 and the suture 2 can be flexibly adjusted according to the needs of the operation, and this embodiment does not limit them.

[0063] It is understood that the knotless anchor provided in this embodiment can achieve knotless fixation of relevant tissues through its own deformation and tightening.

[0064] Example 3:

[0065] This embodiment provides an implantation device, including the knotless suture anchor described in any of the above embodiments, and an implanter. The main body of the knotless suture anchor is located at the end of the implanter, and the suture 2 and traction suture 3 can extend out of the body through the implanter. The implanter can be used to complete the implantation and fixation of the anchor.

[0066] The structure of the above-mentioned implant is as follows Figures 5-7 As shown, it includes a fixed handle 4, an insert rod 5, and a positioning rod 6 arranged coaxially. The fixed handle 4 is a cylindrical structure with an internal cavity. One end of the insert rod 5 is inserted into the fixed handle 4, and the other end is fitted with the positioning rod 6 on its outer periphery, with its end forming an installation part for installing knotless sewing anchors. The fixed handle 4 and the positioning rod 6 are connected.

[0067] The implanter is used to implant and fix the above-mentioned anchors. The positioning rod 6 can realize the positioning function during the anchor implantation process. No additional positioning device is required for installation, which reduces the difficulty of operation and makes the implantation of the knotless suture anchor more convenient.

[0068] Specifically, the aforementioned positioning rod 6 can be connected to the fixed handle 4 by plugging it in.

[0069] In this embodiment and other similar embodiments, the end of the positioning rod 6 away from the fixed handle 4 has a serrated structure.

[0070] The structure of the fixed handle 4 described above is explained below:

[0071] like Figure 6 and Figure 7 As shown, the fixed handle 4 includes a main handle 41 and a secondary handle 42 connected by threads. The secondary handle 42 is located on the side of the main handle 41 facing away from the positioning rod 6, and part of it is inserted into the main handle 41 and connected to the main handle 41 by a threaded connection.

[0072] The middle portion of the aforementioned inner rod 5 has a groove, through which the retaining ring 7 is fitted onto the inner rod 5 and fixedly connected. The outer peripheral sidewall diameter of the retaining ring 7 is larger than the outer peripheral sidewall diameter of the inner rod 5.

[0073] Figure 5 and Figure 6 The lengths of the main handle 41, the insert rod 5, and the positioning rod 6 are for illustrative purposes only; their actual lengths can be adjusted according to the needs of the surgery.

[0074] Specifically, the aforementioned insert rod 5 includes a detachably connected metal through rod 51 and a buckle 52, such as... Figure 7 As shown, the retaining ring 7 is fixedly mounted on the metal rod 51, and the buckle 52 is used to fix the initial position of the metal rod 51.

[0075] One end of the metal rod 51 is fitted with the aforementioned buckle 52, and the other end forms a mounting portion for placing anchors. The mounting portion is recessed inward in the middle to form a U-shaped groove. The anchors are connected to the metal rod 51 through the groove. The suture 2 and the traction 3 pass through the outer side of the metal rod 51 and through the internal cavity of the main handle 41.

[0076] When using this implant, the main body of the knotless suture anchor needs to be installed at the free end of the metal rod 51. At this time, both the suture 2 and the traction suture 3 can pass through the fixing handle 4 along the axis of the metal rod 51 and extend between the fixing handle 4 and the buckle 52. Subsequently, guided by the positioning rod 6, the buckle 52 is removed. By tapping the uppermost end of the metal rod 51, the metal rod 51 can drive the main body of the knotless suture anchor into the bone tunnel. Then, by pulling the sliding end 21 of the suture 2, the deformation sleeve 1 is deformed and anchored, completing the implantation of the anchor. Finally, the relevant surgical instruments are operated so that the sliding end 21 of the suture 2 passes around the tissue to be fixed and then through the traction ring 31. The suture 2 is then pulled out by pulling the traction suture 3 to complete the fixation of the relevant tissue. The implant can be removed by rotating the main handle 41.

[0077] Understandably, the above-mentioned implanter can be used to easily implant and fix the knotless suture anchor.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A knotless seam anchor, characterized in that, include: A deformable sleeve, wherein the deformable sleeve has a hollow structure; The suture thread is inserted into the deformable sleeve. The suture thread includes a sliding end and a fixed end. The sliding end is connected to the fixed end and forms an annular structure that passes through the deformable sleeve. The suture thread is also provided with a traction sleeve. The traction line is inserted through the traction sleeve into the deformation sleeve, and one end of the traction line outside the deformation sleeve is provided with a traction ring that allows the sliding end of the suture line to pass through. When the sliding end is pulled, the deformation sleeve contracts and deforms; A fixed sleeve is formed on the suture line, and the sliding end of the suture line that passes through the deformable sleeve is connected to the fixed end through the fixed sleeve to form the annular structure; The fixing sleeve is formed at the portion of the suture located within the deformable sleeve.

2. The knotless seam anchor according to claim 1, characterized in that, The traction sleeve is formed on the portion of the suture outside the deformable sleeve and is located near the fixed end.

3. The knotless seam anchor according to any one of claims 1-2, characterized in that, The deformable sleeve is a columnar sleeve woven from flexible yarn.

4. An implantable device, characterized in that, The device includes the knotless suture anchor as described in any one of claims 1-3, and further includes an implanter. The implanter includes a fixed handle, an insert rod, and a positioning rod arranged coaxially. The fixed handle is a cylindrical structure with an internal cavity. One end of the insert rod is inserted into the fixed handle, and the positioning rod is sleeved on the outer periphery of the other end, with its end forming an installation part for installing the knotless suture anchor. The fixed handle and the positioning rod are connected.

5. The implantable device according to claim 4, characterized in that, The fixed handle includes a main handle and a secondary handle connected by threads. The secondary handle is located on the side of the main handle opposite to the positioning rod and is partially inserted into the main handle. The insert inner rod is fitted with a retaining ring, which is located inside the main handle and can abut against the secondary handle.

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