Tail end binding and fixing method for artificial ligament

Abstract

The invention relates to the technical field of artificial ligaments, and particularly discloses a tail end binding and fixing method for an artificial ligament, which is mainly used for binding and fixing a pull wire and a tail end fixing section of the artificial ligament, the artificial ligament comprises an intra-articular-cavity free wire section, two woven sections located at the two ends of the intra-articular-cavity free wire section respectively and two tail end fixing sections located on the opposite sides of the two woven sections respectively, and the fixing method mainly comprises the following steps that a pull wire is placed on the outer side of the tail end fixing sections, a part of the pull wire is used for manufacturing a wrapping part, and the wrapping part is used for wrapping the outer side of the tail end fixing sections; wherein the wrapping part wraps a part of the two free strands of the pull wire on the outer side of the tail end fixing section. The structural integrity of the artificial ligament and the reliability of the ligament function are guaranteed, and the risk of inflammation in the body of a patient is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of artificial ligaments, and in particular to a method for fixing the end knot of an artificial ligament. Background Art

[0002] At present, the structure of artificial ligament products on the market mainly consists of three parts: the free wire in the middle, the braided structure on both sides, and the fixed structure at the end. The free wire simulates the anatomical structure of the native ligament, the braided structure on both sides plays a role in lateral fixation of the free wire, and the fixed structure at the end plays a role in knotting and fixing the artificial ligament as a whole, and plays a role in pulling the graft to the appropriate position during the operation.

[0003] Patent CN1909852A discloses a method for fixing the traction line at the end of an artificial ligament. The traction line is inserted into the ligament and comes out from the end. The wire loop formed is crossed and tightened at the insertion position of the traction line. Then a "bandage line" is wrapped around the end of the artificial ligament to fix and protect the end. This solution can provide a higher traction strength, but the traction line opens a hole in the ligament and passes through the inside, destroying the integrity of the ligament structure. When the "bandage line" used is wound, there is no obvious boundary between the winding coils, so that the winding position forms a tight whole, thereby increasing the hardness and making it more difficult to pass through the bone canal. Moreover, the tissue structure of the "bandage line" is not tight and has multiple free ends. It is easy to become loose during transportation and use, which reduces the structural stability of the product. When passing through the bone canal, it is easy to get hooked or broken. Particles left in the joint cavity or bone canal are prone to cause inflammation risks.

[0004] Patent CN117297836A discloses a gauze woven artificial ligament and its preparation method. This scheme adopts an integrated molding method. The traction line is directly woven from the weft yarn reserved during weaving, eliminating the step of installing the traction line. However, due to the integrity of its structure, when passing through the bone tunnel during surgery, if the woven traction line is pulled unevenly, the woven structure and free segment involved in the traction line will be stretched and deformed, causing overall structural damage.

[0005] Therefore, it is very important to develop a stable and effective method for the end knot fixation of artificial ligaments that can achieve firm fixation and traction. Summary of the invention

[0006] The object of the present invention is to provide a method for fixing the end knot of an artificial ligament, so as to solve the problems in the prior art that the structure of the artificial ligament is damaged or easily deformed, and the connection of the traction line is unstable.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] An end knotting and fixing method for an artificial ligament, the artificial ligament comprises a free wire segment in a joint cavity, two braided segments respectively located at two ends of the free wire segment in the joint cavity, and two end fixing segments respectively located on opposite sides of the two braided segments, the end knotting and fixing method for an artificial ligament comprises: placing a traction line on the outside of the end fixing segment, using a part of the traction line to form a covering portion, wherein the covering portion covers a part of the two free strands of the traction line and fixes them to the outside of the end fixing segment.

[0009] As an optional technical solution for the end knotting and fixing method of an artificial ligament, the covering portion includes a covering starting end, a covering section and a covering end, wherein the traction line is first tied with a first knot at the end fixing section to form a covering starting end, and then a second knot is tied at the end fixing section to form a covering end, and finally the covering section is manufactured, and the manufacturing process of the covering section starts from the covering end and ends at the covering starting end.

[0010] As an optional technical solution for the end knotting and fixing method of an artificial ligament, the first knot is a double-loop staggered knot, and its preparation method is as follows: first, the two ends of the traction line are respectively folded inward to form two parallel staggered rings, and a connecting strand is formed between the two staggered rings, and the two staggered rings correspond to two free strands respectively, one of which is located above the connecting strand, and the other free strand is located below the connecting strand, and the connecting strands are bent, and the staggered ring of the free strand below the connecting strand is overlapped on the top of the other staggered ring to form the double-loop staggered knot; the double-loop staggered knot is put into the end fixing section, and the two free strands are pulled to tighten the two staggered rings to the end fixing section.

[0011] As an optional technical solution for the end knotting and fixing method of an artificial ligament, the second knot is a loop knot, and its preparation method is to use one of the free strands to wrap around the other free strand and the end fixing section clockwise, and then bend it counterclockwise after passing it into the gap between itself and the end fixing section.

[0012] As an optional technical solution for the end knotting and fixing method of an artificial ligament, after the end is covered, one of the free strands of the traction line is wound around the end fixing section to form the covering section.

[0013] As an optional technical solution for the end knotting and fixing method of artificial ligament, the free strand winding process forms a plurality of wire loops, and the plurality of wire loops form the covering section; wherein,

[0014] During the winding process, any two adjacent wire loops are brought into contact with each other; and / or,

[0015] The winding process arranges all the wire loops in a single layer starting from the end of the wrapping to the beginning of the wrapping.

[0016] As an optional technical solution for the end knot fixation method of an artificial ligament, the starting end of the coating is located at the junction of the end fixing section and the braided section. After the winding of the coating section is completed, the free strand is passed around the first knot on the top and merged with another free strand after passing through the first knot, the coating section and the second knot in sequence.

[0017] As an optional technical solution for the end knotting and fixation method of an artificial ligament, before preparing the covering portion, an auxiliary wire is first placed on the outside of the end fixing section. After the covering portion is prepared, the covering portion covers the middle part of the auxiliary wire, and the auxiliary wire is pulled out along the direction from the beginning of the covering to the end of the covering, and the free strands are brought out.

[0018] As an optional technical solution for the end knotting and fixing method of an artificial ligament, the auxiliary wire is folded in half to form an auxiliary ring and two auxiliary free wires, and the auxiliary ring is located on the side of the starting end of the covering away from the end of the covering, and the free wires are passed through the auxiliary ring, and by pulling the two auxiliary free wires, the auxiliary ring together with the free wires are passed through the covering part.

[0019] As an optional technical solution for the end knotting and fixing method of an artificial ligament, the traction wire is first prepared by a weaving process, and then the traction wire is fixed to the end fixing section.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a method for fixing the end knot of an artificial ligament, the method comprising placing a traction line on the outside of an end fixing section, using a part of the traction line to form a covering part, wherein the covering part covers and fixes a part of two free strands of the traction line on the outside of the end fixing section. There is no need to open a hole in the end fixing section, thereby ensuring the integrity of the artificial ligament structure; at the same time, since the traction line and the artificial ligament are separately arranged, even if the force is uneven during the traction process, the free wire segment and the braided segment in the joint cavity will not be deformed, thereby ensuring the overall structural stability of the artificial ligament; finally, the traction line is arranged separately to complete the self-fixation, and no additional end is generated, thereby ensuring the reliability of the fixation, avoiding the problem of looseness during transportation or placement, and avoiding leaving residues when shuttling between bone channels, thereby reducing the risk of inflammation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an artificial ligament and a traction line in an embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the first step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the second step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the third step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the fourth step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the fifth step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the sixth step of the end knotting and fixing method for artificial ligaments in an embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the structure of the seventh step of the end knot fixation method for artificial ligaments in an embodiment of the present invention.

[0030] In the figure:

[0031] 100, artificial ligament; 110, free silk segment in the joint cavity; 120, braided segment; 130, terminal fixed segment;

[0032] 200, traction line; 210, first free strand; 220, second free strand; 230, interlaced ring; 240, connecting strand; 250, internal pressure line;

[0033] 300, covering portion; 310, first knot; 320, covering section; 330, second knot;

[0034] 400, auxiliary line; 410, auxiliary free line; 420, auxiliary ring. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] like Figures 1 to 8As shown, this embodiment provides an end knotting and fixing method for an artificial ligament 100, which is used to fix a traction line 200 on the artificial ligament 100, wherein the artificial ligament 100 includes a free wire segment 110 in the joint cavity, two braided segments 120 respectively located at both ends of the free wire segment 110 in the joint cavity, and two end fixing segments 130 respectively located on the opposite sides of the two braided segments 120. The end knotting and fixing method for the artificial ligament 100 has the characteristics of a self-fixing traction line 200, a double-wire loop staggered knot, and a spring-like winding end fixing segment 130, and specifically includes the following steps: placing the traction line 200 on the outside of the end fixing segment 130, and using a part of the traction line 200 to make a covering portion 300, wherein the covering portion 300 covers and fixes a part of the two free strands of the traction line 200 to the outside of the end fixing segment 130.

[0040] The above-mentioned method of fixing the traction wire 200 to the end fixing section 130 does not require opening a hole in the end fixing section 130, thereby ensuring the structural integrity of the artificial ligament 100; at the same time, since the traction wire 200 and the artificial ligament 100 are separately arranged, even if the force is uneven during the traction process, it will not cause deformation of the free wire segment 110 and the braided segment 120 in the joint cavity, thereby ensuring the overall structural stability of the artificial ligament; finally, the traction wire 200 that is separately arranged completes its own fixation without generating additional ends, thereby ensuring the reliability of fixation, avoiding the problem of looseness during transportation or placement, and avoiding leaving residues when passing between bone tunnels, thereby reducing the risk of inflammation in the patient's body.

[0041] In order to ensure the firmness of the fixation of the free strands, in some embodiments, the covering portion 300 includes a covering start end, a covering section 320 and a covering end end, wherein the traction line 200 first ties a first knot 310 at the end fixing section 130 to form a covering start end, then ties a second knot 330 at the end fixing section 130 to form a covering end, and finally makes the covering section 320, and the making process of the covering section 320 starts from the covering end end to the covering start end. This arrangement enables the covering portion 300 to have a certain length and be limited between the first knot 310 and the second knot 330. The preparation process ensures that the covering section 320 has a fixed length and avoids the problem of the covering section 320 being loose.

[0042] Combination Figures 2 to 4As shown, regarding the specific structure of the first knot 310, in some embodiments, the first knot 310 is a double-loop staggered knot, and the preparation method of the double-loop staggered knot is to first fold the two ends of the traction line 200 inward to form two staggered loops 230, and a connecting strand 240 is formed between the two staggered loops 230, and the two staggered loops 230 correspond to two free strands respectively. For the convenience of description and understanding, the two free strands are defined as a first free strand 210 and a second free strand 220 respectively; wherein the first free strand 210 is located above the connecting strand 240, and the second free strand 220 is located below the connecting strand 240, and is bent at the connecting strand 240, and the staggered loop 230 corresponding to the second free strand 220 is overlapped on top of the staggered loop 230 corresponding to the first free strand 210 to form a double-loop staggered knot. The double-loop interlaced knot is inserted into the terminal fixed section 130, and the first free strand 210 and the second free strand 220 are pulled at the same time to tighten the two interlaced loops 230 to the terminal fixed section 130. The double-loop interlaced knot is set so that in the process of pulling the first free strand 210 and the second free strand 220, the double-loop interlaced knot will be tightened and firmly fixed to the terminal fixed section 130.

[0043] Combination Figure 5 As shown, regarding the specific structure of the second knot 330, in some embodiments, the second knot 330 is a loop knot, and the method for preparing the loop knot is to use the first free strand 210 to wrap around the second free strand 220 and the terminal fixed section 130 clockwise, and then bend it counterclockwise after passing through the gap between the first free strand 210 and the terminal fixed section 130. The loop knot can limit the wrapped section 320, and can also wrap the first free strand 210 around the outer periphery of the terminal fixed section 130 and the second free strand 220 based on the loop knot.

[0044] Combination Figure 6As shown, regarding the coating section 320, in some embodiments, after the coating end is completed, the first free strand 210 in the traction line 200 is wound around the periphery of the terminal fixed section 130 and the second free strand 220 to form the coating section 320. The coating section 320 is similar to a spring structure, wrapped around the periphery of the terminal fixed section 130 and the second free strand 220, and the traction line 200 is woven from polyethylene terephthalate (PET) yarn. The first free strand 210 forms a plurality of wire loops during the winding process, and the plurality of wire loops form the coating section 320; the plurality of wire loops are interrelated but not fused, so that the coating section 300 does not form a high-hardness whole, retaining the flexibility of the structure, so that when passing through the bone tunnel and the non-linear intra-articular passage, it can bend in sequence and pass smoothly similar to each carriage of a train passing a curve; at the same time, Since the traction line 200 is a braided structure, the traction line 200 itself has a certain elasticity. Any two adjacent wire loops among the plurality of wire loops tend to move away from each other under the state of mutual squeezing and constraint, which can ensure that the internal second free strand 220 is always in a taut and straight state; finally, the wire loop has an expansion tendency due to the elastic force of the internal second free strand 220, and the internal second free strand 220 is compressed and constrained by the wire loop, and the two are relatively pressed together. Under the action of friction, the sheath section 320 and the internal second free strand 220 maintain structural stability.

[0045] All the wire loops are arranged in a single layer from the end of the covering to the beginning of the covering, so as not to interfere with each other when the end fixing section 130 turns, thereby improving the flexibility of turning.

[0046] The beginning of the wrapping is located at the junction of the terminal fixed section 130 and the braided section 120. After the wrapping of the wrapping section 320 is completed, the first free strand 210 is passed over the first knot 310, and then passes through the first knot 310, the wrapping section 320, and the second knot 330 in sequence before merging with the second free strand 220. This method allows both the first free strand 210 and the second free strand 220 to be used for pulling, thereby increasing the pulling force. In this embodiment, the wrapping section 320 has three internal pressure lines 250 formed by the traction lines 200, two of which are formed by the first free strand 210 wrapped around the wrapping section 320, and the other internal pressure line 250 is formed by a part of the second free strand 220.

[0047] Combination Figures 6 to 8As shown, in order to ensure that the first free strand 210 can smoothly pass through the covering portion 300, in some embodiments, before preparing the covering portion 300, an auxiliary wire 400 is first placed on the outside of the terminal fixing section 130. After the covering portion 300 is prepared, the covering portion 300 covers the middle part of the auxiliary wire 400, and the auxiliary wire 400 is pulled out along the direction from the beginning of the covering to the end of the covering, and the first free strand 210 is taken out. Specifically, the auxiliary wire 400 is folded in half to form an auxiliary ring 420 and two auxiliary free wires 410. The auxiliary ring 420 is located on the side of the covering beginning away from the covering end. The first free strand 210 is passed through the auxiliary ring 420, and the auxiliary ring 420 is pulled through the covering portion 300 together with the first free strand 210 by pulling the two auxiliary free wires 410. This method can greatly improve the efficiency of passing the first free strand 210 through the covering portion 300 without affecting the structure of the covering portion 300.

[0048] In order to reduce the impact on the covering portion 300, in this embodiment, the diameter of the auxiliary wire 400 is smaller than that of the pulling wire 200. In order to reduce the cost, the strength of the auxiliary wire 400 is smaller than that of the pulling wire 200.

[0049] In some embodiments, the processing method of the artificial ligament 100 includes the steps of weaving, cutting, winding, and suturing, wherein the free filament segment 110 in the joint cavity is a parallel filament without a woven structure, located in the middle of the artificial ligament 100; the two braided segments 120 are woven sheet structures that are wound and sewed, are cylindrical, and are connected to the two sides of the free filament segment 110 in the joint cavity; the two end fixing segments 130 are conical, each connected to the distal end of the two braided segments 120; the two traction lines 200 fix the ends of the main part of the ligament by knotting and winding.

[0050] In some embodiments, the artificial ligament 100 is woven from polyethylene terephthalate (PET) yarn. The cylindrical free filament segment 110 in the joint cavity is a woven structure, and the conical end fixed segment 130 and the cylindrical woven segment 120 are smoothly transitioned. Specifically, the ligament woven sheet is cut into an isosceles trapezoidal shape by laser cutting technology. After rolling, the rectangle formed by the upper side length of the isosceles trapezoid and the height passing through the upper side length is the part forming the free filament segment 110 and the woven segment 120 in the joint cavity, and the right triangle formed by the hypotenuse of the isosceles trapezoid and the height passing through the upper side length is the part forming the end fixed segment 130. The isosceles trapezoidal ligament woven sheet is rolled up in the direction of height, and the free filament segment 110 in the joint cavity is twisted, and then sutured and fixed, so as to form the artificial ligament 100.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for fixing an end knot of an artificial ligament, wherein the artificial ligament (100) comprises a free wire segment (110) in a joint cavity, two braided segments (120) respectively located at two ends of the free wire segment (110) in the joint cavity, and two end fixing segments (130) respectively located at opposite sides of the two braided segments (120), characterized in that: The end knotting and fixing method for an artificial ligament comprises: placing a traction line (200) on the outside of an end fixing section (130), using a part of the traction line (200) to form a covering portion (300), wherein the covering portion (300) covers a part of two free strands of the traction line (200) and fixes them on the outside of the end fixing section (130).

2. The method for fixing the end knot of an artificial ligament according to claim 1, characterized in that: The covering portion (300) comprises a covering start end, a covering section (320) and a covering end end, wherein the traction line (200) is firstly tied with a first knot (310) at the end fixing section (130) to form a covering start end, and then a second knot (330) is tied at the end fixing section (130) to form a covering end, and finally the covering section (320) is manufactured, and the manufacturing process of the covering section (320) starts from the covering end and ends at the covering start end.

3. The method for fixing the end knot of an artificial ligament according to claim 2, characterized in that: The first knot (310) is a double-loop interlaced knot, and its preparation method is as follows: first, two ends of the traction line (200) are respectively rolled inward to form two parallel interlaced rings (230), and a connecting strand (240) is formed between the two interlaced rings (230), and the two interlaced rings (230) correspond to two free strands respectively, one of which is located above the connecting strand (240), and the other free strand is located below the connecting strand (240), and is bent at the connecting strand (240), and the interlaced ring (230) of the free strand below the connecting strand (240) is overlapped on the other interlaced ring (230) to form the double-loop interlaced knot; the double-loop interlaced knot is inserted into the end fixed section (130), and the two free strands are pulled to tighten the two interlaced rings (230) to the end fixed section (130).

4. The method for fixing the end knot of an artificial ligament according to claim 2, characterized in that: The second knot (330) is a loop knot, which is prepared by using one of the free strands to clockwise wrap around the other free strand and the terminal fixed section (130), and then bend it counterclockwise after passing through the gap between itself and the terminal fixed section (130).

5. The method for fixing the end knot of an artificial ligament according to claim 2, characterized in that: After the end is coated, one of the free strands of the pulling line (200) is wound around the end fixing section (130) to form the coated section (320).

6. The method for fixing the end knot of an artificial ligament according to claim 5, characterized in that: The free strand winding process forms a plurality of wire loops, and the plurality of wire loops form the covering section (320); wherein, During the winding process, any two adjacent wire loops are brought into contact with each other; and / or, The winding process arranges all the wire loops in a single layer starting from the end of the wrapping to the beginning of the wrapping.

7. The method for fixing the end knot of an artificial ligament according to claim 2, characterized in that: The starting end of the covering is located at the intersection of the end fixing section (130) and the braiding section (120). After the winding of the covering section (320) is completed, the free strand is passed around the first knot (310) at the top, and after passing through the first knot (310), the covering section (320) and the second knot (330) in sequence, it merges with another free strand.

8. The method for fixing the end knot of an artificial ligament according to claim 7, characterized in that: Before preparing the covering portion (300), an auxiliary wire (400) is placed outside the end fixing section (130). After the covering portion (300) is prepared, the covering portion (300) covers the middle part of the auxiliary wire (400), and the auxiliary wire (400) is pulled out along the direction from the beginning of the covering to the end of the covering, and the free strands are taken out.

9. The method for fixing the end knot of an artificial ligament according to claim 8, characterized in that: The auxiliary wire (400) is folded in half to form an auxiliary ring (420) and two auxiliary free wires (410); the auxiliary ring (420) is located on a side of the covering start end away from the covering end; the free wire is passed through the auxiliary ring (420); and by pulling the two auxiliary free wires (410), the auxiliary ring (420) together with the free wire is passed through the covering portion (300).

10. The method for fixing the end knot of an artificial ligament according to any one of claims 1 to 9, characterized in that: The pulling wire (200) is first prepared by a braiding process, and then the pulling wire (200) is fixed to the terminal fixing section (130).

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