External full suture anchor and implantation device

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, disclose a kind of outside row full suture anchor and implantation device.The outside row full suture anchor includes anchor body, locking wire and traction line, at least part of locking wire is inserted into anchor body passage, locking wire end portion is drawn out from anchor body periphery side after, locking wire both ends are mutually connected into locking ring by interpenetration, at least part of traction line is inserted into passage, and the both ends of traction line are drawn out respectively by passage mouth and extend to the outside of corresponding passage mouth, and one end of traction line passes through locking ring, so when operation, traction line is pulled to make anchor body contract and jam bone channel, then suture from inside row anchor is connected on the wire ring of the other end of traction line, and then suture is drawn along the traction path of traction line and passes through anchor body, and further passes through locking ring, locking ring is tightened after, suture can be pressed and fixed, effectively improve the fixed stability of suture, prevent suture from sliding, reduce the possibility of slipping failure.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an externally arranged full-suture anchor and implantation device. Background Technology

[0002] External and internal anchors are two key fixation devices in orthopedic surgery, especially widely used in minimally invasive surgeries such as rotator cuff repair and ligament reconstruction. Internal anchors usually come with sutures and can be directly implanted into the bone at the interface between soft tissue and bone. External anchors, on the other hand, do not come with sutures themselves, but instead fix the sutures from the internal anchors to the bone surface outside the damaged soft tissue, thus providing final fixation for the sutures.

[0003] In the prior art, if the full-stitch anchor is used as the outer row, due to the flexible nature of the full-stitch anchor itself, the suture from the inner row anchor is difficult to fix after passing through the full-stitch anchor, resulting in poor stability and easy slippage failure.

[0004] Therefore, there is an urgent need to provide an external full-suture anchor and implantation device to solve the problem that existing full-suture anchors are difficult to stably fix the sutures from the internal anchors when used as external anchors, and are prone to slippage and failure. Utility Model Content

[0005] The purpose of this invention is to provide an externally arranged full-suture anchor and an implantation device to solve the problem that existing full-suture anchors are difficult to stably fix the sutures from the internally arranged anchors when used as external anchors, and are prone to slippage and failure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides an external row of fully sewn anchors, including an anchor body, a locking wire, and a traction wire. The anchor body has a through-hole, with openings at both ends. Both the locking wire and the traction wire are at least partially placed within the through-hole. The locking wire's two ends pass through the periphery of the anchor body and interlock to form a locking ring. The traction wire's two ends pass through the openings and extend to the outside of the corresponding openings. One end of the traction wire passes through the locking ring, and the other end has a loop for connecting to the sewn thread of the inner row of anchors, thus guiding the sewn thread along the traction path through the anchor body and the locking ring.

[0008] As an optional technical solution for externally arranged full-stitch anchors, the locking line is formed by folding a braided segment in half, with the folded part of the braided segment serving as the first end of the locking line, and the two ends of the braided segment serving as the second end of the locking line. The locking ring is formed by inserting the two ends of the braid into the folded part.

[0009] Alternatively, the first end of the locking line may have a slip knot, and the locking ring may be formed by the second end of the locking line passing through the slip knot at the first end of the locking line.

[0010] As an optional technical solution for externally arranged fully sewn anchors, the traction line is provided in two parts, namely a first traction line and a second traction line, for corresponding to the two seams of the internally arranged anchors. The first traction line and the second traction line pass through the channel in opposite directions, and both the first traction line and the second traction line pass through the locking ring.

[0011] As an optional technical solution for externally arranged full-stitch anchors, each of the aforementioned traction lines is wound around the locking ring at least once.

[0012] As an optional technical solution for externally arranged full-stitch anchors, the traction line is a hollow structure with an inner hole. The traction line has a side insertion port communicating with the inner hole. The traction line has an insertion section. The line loop is formed by inserting the insertion section into the inner hole through the side insertion port. The size of the line loop is adjustable.

[0013] As an optional technical solution for externally arranged full-stitch anchors, the length of the insertion section inserted into the inner hole through the side insertion port ranges from 10mm to 50mm.

[0014] As an optional technical solution for externally arranged full-suture anchors, the anchor body is symmetrically folded into a U-shaped structure in the middle, and the U-shaped structure is used for implantation into bone tissue.

[0015] As an optional technical solution for externally arranged fully sewn anchors, the anchor body and the traction line are made of the same material, both of which are ultra-high molecular weight polyethylene.

[0016] As an optional technical solution for externally arranged full-stitch anchors, the locking line and / or the traction line pass through the anchor body multiple times from the periphery of the anchor body.

[0017] This invention provides an implantation device, including an implanter and the aforementioned external suture anchor, wherein the implanter is used to implant the folded anchor body into bone tissue.

[0018] Beneficial effects:

[0019] This utility model provides an external row of fully sewn anchors, which includes an anchor body, a locking wire, and a traction wire. The anchor body has a through-hole, and the locking wire and the traction wire are formed at both ends of the anchor body. Both the locking wire and the traction wire are at least partially placed in the through-hole. The two ends of the locking wire pass through the periphery of the anchor body and interlock to form a locking ring. The two ends of the traction wire pass through the through-hole and extend to the outside of the corresponding through-hole. One end of the traction wire passes through the locking ring, and the other end of the traction wire has a loop for connecting the sewn thread of the inner row of anchors. The traction thread passes through the anchor body and through the locking ring along the traction path of the traction wire. At least part of the locking suture is inserted into the channel. After the end of the locking suture exits from the periphery of the anchor body, the two ends of the locking suture are interlocked to form a locking loop. At least part of the traction suture is inserted into the channel. The two ends of the traction suture exit from the channel opening and extend to the outside of the corresponding channel opening. One end of the traction suture passes through the locking loop. During the operation, the traction suture is pulled to cause the anchor body to contract and lock into the bone channel. Then, the suture from the inner row of anchors is connected to the suture loop at the other end of the traction suture. The suture is then pulled along the traction path of the traction suture through the anchor body and further through the locking loop. After the locking loop is tightened, the suture is pressed and fixed, which effectively improves the fixation stability of the suture, prevents the suture from slipping, and reduces the possibility of slippage failure.

[0020] This invention provides an implantation device comprising an implanter and the aforementioned externally arranged full-suture anchor. The implanter inserts the folded anchor body into the bone tissue. Using the implanter to insert the folded externally arranged full-suture anchor into the bone tissue is simple, stable, and reliable. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the externally arranged full-seam anchor provided in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the traction line provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the externally arranged full-suture anchor and implanter provided in this embodiment of the utility model;

[0024] Figure 4 This is a partial structural diagram of the externally arranged full-suture anchor before implantation, provided in this embodiment of the utility model;

[0025] Figure 5 This is a table of fatigue displacement and fixation strength test data provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 1. Anchor body; 11. Channel opening; 12. Side opening;

[0028] 2. Locking thread; 20. Locking ring; 21. Fold in half; 22. Thread end;

[0029] 3. Traction line; 3a. First traction line; 3b. Second traction line; 30. Line loop; 31. Side insertion port;

[0030] 4. Implant device. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figures 1 to 4As shown, this embodiment provides an externally arranged full-suture anchor and an implantation device. The implantation device includes an implanter 4 and an externally arranged full-suture anchor. The implanter 4 is used to implant the folded anchor body 1 into the bone tissue. The externally arranged full-suture anchor includes an anchor body 1, a locking suture 2, and a traction suture 3. A channel is provided through the anchor body 1, and channel openings 11 are formed at both ends of the anchor body 1. The locking suture 2 and the traction suture 3 are at least partially placed in the channel. The two ends of the locking suture 2 pass through the outer periphery of the anchor body 1 and interlock to form a locking ring 20. The two ends of the traction suture 3 pass through the channel openings 11 and extend to the outside of the corresponding channel openings 11. One end of the traction suture 3 passes through the locking ring 20, and the other end of the traction suture 3 is provided with a loop 30 for connecting the suture of the inner row of anchors, so that the traction suture passes through the anchor body 1 and through the locking ring 20 along the traction path of the traction suture 3.

[0036] At least part of the locking suture 2 is inserted into the channel. After the end of the locking suture 2 passes through the periphery of the anchor body 1, the two ends of the locking suture 2 are interlocked to form a locking ring 20. At least part of the traction suture 3 is inserted into the channel. The two ends of the traction suture 3 pass through the channel opening 11 and extend to the outside of the corresponding channel opening 11. One end of the traction suture 3 passes through the locking ring 20. During the operation, the traction suture 3 is pulled to cause the anchor body 1 to contract and lock the bone channel. Then, the suture from the inner row of anchors is connected to the suture loop 30 at the other end of the traction suture 3. The suture is then pulled along the traction path of the traction suture 3 through the anchor body 1 and further through the locking ring 20. After the locking ring 20 is tightened, the suture is pressed and fixed, which effectively improves the fixation stability of the suture, prevents the suture from slipping, and reduces the possibility of slippage failure.

[0037] Specifically, the locking line 2 and / or the traction line 3 repeatedly enter and exit the anchor body 1 from the outer periphery of the anchor body 1. Designing the locking line 2 and the traction line 3 to enter and exit multiple times can effectively distribute stress, reduce single-point stress, and enhance tensile strength and fixing stability.

[0038] The anchor body 1 is symmetrically folded into a U-shape in the middle; this U-shape is used for implantation into bone tissue. (See also...) Figure 4 The anchor body 1 is folded into a U-shaped structure and then implanted into the bone tissue, which makes the bone tunnel required during implantation smaller, reducing damage to the bone tissue. The symmetrical design also ensures that the anchor body 1 is evenly stressed in the bone tunnel, avoiding loosening or displacement due to stress concentration on one side, and reducing the risk of postoperative dislodgement.

[0039] In this embodiment, the anchor body 1 and the traction wire 3 are made of the same material, both being ultra-high molecular weight polyethylene (UHMWPE). Using the same material for both the anchor body 1 and the traction wire 3 ensures consistent tensile strength and fatigue resistance, preventing breakage due to material differences. UHMWPE possesses excellent mechanical properties, enabling it to withstand long-term friction with bone tissue, reducing the risk of failure due to wear. Furthermore, it has good biocompatibility, making it suitable for medical scenarios with high safety requirements.

[0040] Furthermore, the locking line 2 is formed by folding a braided segment in half. The fold 21 of the braided segment serves as the first end of the locking line 2, and the two tails 22 of the braided segment serve as the second ends of the locking line 2. The locking ring 20 is formed by inserting the two tails 22 through the fold 21. Folding the braided segment in half creates the fold 21 and the two tails 22. Then, the two tails 22 are passed through the fold 21 to form a double-line locking ring 20. Compared to a single line, this double-line locking ring can withstand greater dynamic loads and has a more stable structure.

[0041] In this embodiment, the anchor body 1 has two side openings 12 spaced apart on its outer periphery. The side openings 12 are connected to the channel of the anchor body 1. The folded portion 21 of the braided thread segment is inserted into the channel through one side opening 12 and then exits through both side openings 12, so that the folded portion 21 of the braided thread segment and the two thread tails 22 are both externally positioned at the corresponding side openings 12. Then, the two thread tails 22 are passed through the folded portion 21 to form a double-thread locking ring 20. In other embodiments, multiple side openings 12 may be provided so that the folded portion 21 of the braided thread segment can be inserted into or exited through the anchor body 1 multiple times through different side openings 12.

[0042] In some embodiments, a slip knot may be provided at the first end of the locking line 2, and the locking ring 20 is formed by the second end of the locking line 2 passing through the slip knot at the first end of the locking line 2. By providing a slip knot at the first end of the locking line 2, the second end of the locking line 2 can pass through the slip knot with a simple threading action to form the locking ring 20. The slip knot design facilitates the adjustment of tightness and is also more convenient to operate.

[0043] See Figure 1 and Figure 2 Optionally, there are two traction lines 3, namely a first traction line 3a and a second traction line 3b. The first traction line 3a and the second traction line 3b pass through the channel in opposite directions. The first end of the first traction line 3a and the second traction line 3b both pass through the locking ring 20 and the second end of each traction line 3b is provided with a loop 30. The loops 30 of the first traction line 3a and the second traction line 3b are respectively used to connect the two seams of the inner row of anchor nails.

[0044] The design incorporates two traction lines 3, which can guide the two seams of the inner row of anchors into the outer row of fully sewn anchors. Furthermore, the two traction lines 3 pass through the locking ring 20 in opposite directions, thereby cooperating with the locking ring 20 to further enhance the fixing stability.

[0045] Furthermore, the traction line 3 is a hollow structure with an inner hole. The traction line 3 is provided with a side insertion port 31 that communicates with the inner hole. The traction line 3 has an insertion section. The loop 30 is formed by inserting the insertion section into the inner hole through the side insertion port 31. The size of the loop 30 is adjustable.

[0046] A loop 30 is designed at the end of the traction suture 3, which helps to quickly connect the suture and shorten the operation time. The size of the loop 30 can be adjusted as needed to improve intraoperative flexibility and is suitable for surgical scenarios with high requirements for tension control.

[0047] In this embodiment, the length of the insertion segment inserted into the inner hole through the side insertion port 31 is L, and the value of L ranges from 10mm to 50mm. Among them, the length L of the insertion segment inserted into the inner hole through the side insertion port 31 includes, but is not limited to, 10mm, 20mm, 30mm, 40mm, and 50mm.

[0048] See Figure 4 In this embodiment, the first traction wire 3a and the second traction wire 3b are both wound around the locking ring 20 at least once, that is, the end of the first traction wire 3a is inserted into the locking ring 20 twice to achieve one turn of the locking ring 20.

[0049] When the traction suture 3 is wrapped around the locking ring 20 at least once, and the traction operation of the suture is completed, the locking ring 20 is tightened. Under the action of tension, the locking ring 20 gradually shrinks and retracts into the bone tunnel. The suture is gradually pressed into the anchor body 1. At the same time, the suture and the locking ring 20 form an interlocking entanglement. The suture exerts a reverse compressive force on the locking ring 20, which increases the friction between the suture segments at the entanglement. The greater the tension on the suture, the greater the locking force at the entanglement, which can effectively prevent the free end of the suture from slipping. Moreover, after the locking ring 20 is contracted, it is located inside the bone tunnel and will not irritate the soft tissue, thus avoiding inflammation.

[0050] The following is the specific usage process of external full-line anchors:

[0051] After the internal row of anchors is implanted during the operation, the sutures of the internal row of anchors are pulled out of the body. The implanter 4 and the external row of full-suture anchors are assembled, and the implanter 4 is aligned with the designated position on the outer side of the rotator cuff insertion point. The rear end of the implanter 4 is tapped with a bone hammer to insert the implanter 4 into the bone tissue until the marked line is flush with the bone surface. All the traction sutures 3 and locking sutures 2 of the external row of full-suture anchors are removed from the handle of the implanter 4, and the implanter 4 is pulled out. Pulling the traction sutures 3 causes the anchor body 1 to expand into a knot in the bone tunnel, firmly locking the bone tunnel and providing reliable holding force. Then the internal row of anchors is removed. The sutures of the anchors are connected to the loops 30 of the traction line 3. Pulling the traction line 3 pulls the sutures of the inner row of anchors through the anchor body 1 and wraps them around the locking ring 20, thus bridging the outer row of anchors with full sutures and the inner row of anchors. The operation is simple. Finally, tighten the locking line 2 so that the locking ring 20 is drawn into the bone tunnel. The sutures and the locking ring 20 are interlocked, thus preventing the sutures from sliding and achieving the locking effect of the sutures. The suture ends outside the anchor body 1 and does not increase the diameter of the anchor body 1. Finally, the excess sutures are cut off to complete the fixation, and the skin is sutured to complete the surgery.

[0052] See Figure 5Under the same experimental conditions, the fatigue displacement and fixing strength performance of the externally arranged fully sewn anchors of this embodiment were compared with those of traditional fully sewn anchors, knotless anchors, and ship anchor-shaped knotless anchors. According to the fatigue displacement test data, the average fatigue displacement of the externally arranged fully sewn anchors provided in this embodiment was 2.47 mm, the average fatigue displacement of the ship anchor-shaped knotless anchors was 3.72 mm, the average fatigue displacement of the fully sewn anchors was 2.51 mm, and the average fatigue displacement of the knotless anchors was 4.06 mm. The average fatigue displacement of the externally arranged fully sewn anchors provided in this embodiment was 1.24 mm lower than that of the ship anchor-shaped knotless anchors, close to that of traditional fully sewn anchors, and 1.58 mm lower than that of the knotless anchors.

[0053] According to the fixation strength test data, the average fixation strength of the external row fully sewn anchor provided in this embodiment is 321.79N, the average fixation strength of the ship anchor-shaped knotless anchor is 270.96N, the average fixation strength of the fully sewn anchor is 264.54N, and the average fixation strength of the knotless anchor is 242.63N. The average fixation strength of the external row fully sewn anchor provided in this embodiment is 50N higher than that of the ship anchor-shaped knotless anchor, 57N higher than that of the traditional fully sewn anchor, and 79N higher than that of the knotless anchor.

[0054] Preliminary findings indicate that the externally arranged fully sutured anchor provided in this embodiment outperforms ship anchor-shaped knotless anchors, existing fully sutured anchors, and knotless anchors in terms of both fatigue displacement and fixing strength. The mechanical properties are significantly improved, meeting the needs of clinical use.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Externally arranged full-stitch anchors, characterized in that, The device includes an anchor body (1), a locking line (2), and a traction line (3). The anchor body (1) has a channel running through it and channel openings (11) are formed at both ends of the anchor body (1). The locking line (2) and the traction line (3) are both placed at least partially in the channel. The two ends of the locking line (2) pass through the outer periphery of the anchor body (1) and interlock to form a locking ring (20). The two ends of the traction line (3) pass through the channel openings (11) and extend to the outside of the corresponding channel openings (11). One end of the traction line (3) passes through the locking ring (20), and the other end of the traction line (3) is provided with a loop (30) for connecting the seam of the inner row of anchors, so as to pull the seam along the traction path of the traction line (3) through the anchor body (1) and through the locking ring (20).

2. The externally arranged full-stitch anchor pin according to claim 1, characterized in that, The locking line (2) is formed by folding a braided line segment in half. The fold (21) of the braided line segment serves as the first end of the locking line (2), and the two ends (22) of the braided line segment serve as the second end of the locking line (2). The locking ring (20) is formed by inserting the two ends (22) into the fold (21). Alternatively, the first end of the locking line (2) is provided with a slip knot, and the locking ring (20) is formed by the second end of the locking line (2) passing through the slip knot at the first end of the locking line (2).

3. The externally arranged full-stitch anchor pin according to claim 1, characterized in that, The traction line (3) has two parts, namely a first traction line (3a) and a second traction line (3b), which are used to correspond to the two seams of the inner row of anchors. The first traction line (3a) and the second traction line (3b) pass through the channel in opposite directions. Both the first traction line (3a) and the second traction line (3b) pass through the locking ring (20).

4. The externally arranged full-stitch anchor pin according to claim 3, characterized in that, Each of the aforementioned traction lines (3) is wound around the locking ring (20) at least one turn.

5. The externally arranged full-seam anchor pin according to claim 1, characterized in that, The traction line (3) is a hollow structure with an inner hole. The traction line (3) is provided with a side insertion port (31) communicating with the inner hole. The traction line (3) has an insertion section. The loop (30) is formed by inserting the insertion section into the inner hole through the side insertion port (31). The size of the loop (30) is adjustable.

6. The externally arranged full-stitch anchor pin according to claim 5, characterized in that, The length of the insertion segment inserted into the inner hole via the side insertion port (31) ranges from 10mm to 50mm.

7. The external full-stitch anchor pin according to any one of claims 1-6, characterized in that, The anchor body (1) is symmetrically folded in the middle into a U-shaped structure, which is used for implantation into bone tissue.

8. The external full-stitch anchor pin according to any one of claims 1-6, characterized in that, The anchor body (1) and the traction line (3) are made of the same material, both of which are ultra-high molecular weight polyethylene.

9. The external full-stitch anchor pin according to any one of claims 1-6, characterized in that, The locking line (2) and / or the traction line (3) are inserted into or exited from the anchor body (1) multiple times from the outer periphery of the anchor body (1).

10. An implantable device, characterized in that, Includes an implanter (4) and an externally arranged full-suture anchor as described in any one of claims 1-9, the implanter (4) being used to implant the folded anchor body (1) into bone tissue.

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