Medical barb suture line giving consideration to tissue puncture injury and anti-sliding performance

Abstract

The invention discloses a medical barb suture line giving consideration to tissue puncture injury and anti-sliding performance, and belongs to the field of medical instruments. The medical barb suture line comprises a line body and a plurality of barb units arranged at intervals in the length direction of the line body, each barb unit comprises a flexible barb and a rigid barb, the flexible barbs obliquely extend outwards from the line body, the rigid barbs extend outwards from the line body, and the rigid barbs are located on the oblique extending sides of the flexible barbs. The free end of the flexible barb extends to the outer side of the rigid barb, and a containing gap is formed between the flexible barb and the rigid barb. The flexible barbs and the rigid barbs cooperate with each other, so that when the suture line punctures a tissue, the flexible barbs can contract inwards under inward extrusion of the tissue, and damage to the tissue is reduced; when the suture line is subjected to reverse pulling force, the rigid barbs can hook the tissue, the tissue grasping force is further increased through the deformation and opening effect of the flexible barbs, and the anti-sliding capacity of the suture line is improved.

Description

Technical Field

[0001] This invention relates to a medical suture, and more specifically, to a barbed medical suture that combines tissue puncture damage and anti-slip properties. Background Technology

[0002] In various surgical procedures, suturing is a fundamental means of closing wounds and reconstructing tissues. Traditional smooth sutures rely on surgeons tying knots to secure the sutures and ensure wound apposition. However, clinical practice feedback indicates that relying on knotting has significant drawbacks: knotting is time-consuming, prolonging surgical time; more importantly, knots carry the risk of slippage or loosening, especially in tissues under continuous tension (such as fascia, tendons, and vascular anastomoses) or in frequently moving areas (near joints). Once the knot fails, it can lead to wound dehiscence, poor tissue apposition, and serious complications such as bleeding, infection, and hernia formation, even requiring secondary surgery for repair. In addition, knotting itself can form suture clumps locally, potentially increasing foreign body reaction, compressing tissues, or affecting aesthetics.

[0003] Although existing barbed sutures, by setting unidirectional barbs on the surface of the suture body, theoretically provide knotless fixation, reduce the risk of slippage, and shorten operation time, clinical feedback still reveals key shortcomings: the existing barbed structure sometimes lacks sufficient anti-slip capability in complex tissues or high-tension environments, and there is still a potential risk of displacement or even loosening; at the same time, some barb designs are too sharp or rigid, which can easily cut and damage fragile tissues (such as fat, nerves, blood vessels, etc.) during suturing or tissue activity, increasing local inflammation and pain, and affecting the quality of healing. Chinese Patent Publication No. CN104640508A discloses "Barbed Suture with Contoured Bars that Facilitate Tissue Passage and Increase Retention Strength" (publication date: May 20, 2015), which utilizes the unique double-radius shape of the outer edge of the barb and the tip of the barb to minimize resistance when pulling the filamentous element through the tissue in a first direction, and to maximize the resistance to movement when pulling the filamentous element through the tissue in the opposite second direction. However, because its barbs are relatively narrow and flexible (which is conducive to passing through tissue), the barbs are also prone to deforming inward due to the binding effect of the tissue when resisting slip in the opposite direction. This makes it difficult for the barbs to combine with the surrounding tissue to generate anti-slip resistance. Therefore, its anti-slip ability still needs to be strengthened.

[0004] Chinese Patent Publication No. CN217310424U discloses a "Barbed Suture" (publication date: August 30, 2022), which discloses a double-barbed suture. The barbs consist mainly of a main barb and an auxiliary barb. The auxiliary barb is placed on the main barb to utilize the main barb to provide the primary force for lifting and traction of the sutured wound tissue, while the auxiliary barb provides supplementary force to improve the stability of the sutured wound. However, this double-barbed design actually adds an auxiliary barb inside the main barb. This design requires the main barb to have a larger opening angle, which on the one hand increases the resistance to puncturing the tissue, and on the other hand makes the suture more traumatic to the tissue.

[0005] Therefore, there is an urgent need to develop a new type of barbed suture that can significantly improve tissue compatibility while ensuring excellent anti-slip properties to eliminate the risk of knot failure, and minimize iatrogenic damage to the tissues surrounding the suture path, thus meeting the urgent clinical demand for safe, efficient and reliable suturing. Summary of the Invention

[0006] 1. The technical problem that the invention aims to solve

[0007] The purpose of this invention is to overcome the shortcomings of existing barbed sutures, such as poor anti-slipping ability and significant tissue damage during puncture, and to provide a medical barbed suture that balances tissue puncture damage and anti-slipping performance. The technical solution of this invention utilizes the synergistic cooperation of flexible and rigid barbs. When the suture punctures tissue, the flexible barbs contract inward under the inward pressure of the tissue, thereby reducing tissue damage. Simultaneously, the inwardly contracting flexible barbs can, to some extent, cover the rigid barbs, reducing scratches on the tissue. When the suture is subjected to a reverse pulling force, the rigid barbs can hook onto the tissue, causing the tissue to naturally combine with the flexible barbs outward. The deformation and opening effect of the flexible barbs further increases the tissue holding force and improves the anti-slipping ability of the suture. Furthermore, the space between the flexible and rigid barbs can accommodate some tissue, allowing the suture and tissue to fuse better, which is beneficial for tissue growth and recovery.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0010] The present invention provides a medical barbed suture that combines tissue puncture damage and anti-slip properties, comprising a suture body and a plurality of barbed units spaced apart along the length of the suture body, wherein:

[0011] The barb unit includes flexible barbs and rigid barbs. The flexible barbs extend obliquely outward from the line body, and the rigid barbs also extend outward from the line body. The rigid barbs are located on the oblique extension side of the flexible barbs. The free end of the flexible barbs extends to the outside of the rigid barbs, and a receiving gap is formed between the flexible barbs and the rigid barbs.

[0012] Furthermore, the rigid barbs extend outward at an angle, and the rigid barbs and flexible barbs are tilted in the same direction.

[0013] Furthermore, the inclination angle α of the flexible barb relative to the longitudinal axis Z of the line body is 25° to 45°, and the inclination angle β of the rigid barb relative to the longitudinal axis Z of the line body is 45° to 65°.

[0014] Furthermore, the flexible barb is an arc-shaped barb that bends in the direction of the rigid barb, and the stiffness of the flexible barb gradually decreases from the root to the free end.

[0015] Furthermore, the size of the flexible barb gradually decreases from the root to the free end, and the inner and outer sides of the root of the flexible barb have transition arc surfaces with the line body. The outer side of the flexible barb has an outwardly convex arc surface located between the root and the free end, and the inner side of the flexible barb has an inwardly concave arc surface located between the root and the free end.

[0016] Furthermore, the free end of the flexible barb is either a sharp corner or a rounded corner.

[0017] Furthermore, the barb units are symmetrically arranged on both sides of the line or staggered along the length of the line.

[0018] Furthermore, the ratio of the distance L1 between the tips of the rigid barbs on both sides of the thread to the same-direction dimension D1 of the thread is 1.5 to 2.5, and the ratio of the distance L2 between the free ends of the flexible barbs on both sides of the thread to the distance L1 between the tips of the rigid barbs on both sides of the thread is 1.5 to 2.5.

[0019] Furthermore, the cross-sectional shape of the line is polygonal or circular.

[0020] Furthermore, the barb unit is cut from a strip of plate with a rhomboid cross-section, and the resulting line has a hexagonal cross-sectional shape.

[0021] 3. Beneficial effects

[0022] Compared with existing known technologies, the technical solution provided by this invention has the following significant advantages:

[0023] (1) A medical barbed suture of the present invention, which takes into account both tissue puncture damage and anti-slip performance, includes a suture body and a plurality of barbed units spaced apart along the length of the suture body. The barbed units include flexible barbs and rigid barbs. The flexible barbs extend obliquely outward from the suture body, and the rigid barbs also extend outward from the suture body. The rigid barbs are located on the oblique extension side of the flexible barbs. The free end of the flexible barbs extends to the outside of the rigid barbs. A receiving gap is formed between the flexible barbs and the rigid barbs. By utilizing the cooperation of the flexible barbs and the rigid barbs, the flexible barbs are protected by the tissue when the suture punctures the tissue. The inward compression can shrink inward, thereby reducing damage to the tissue. At the same time, the flexible barbs that shrink inward can cover the rigid barbs to a certain extent, reducing the scratches caused by the rigid barbs to the tissue. When the suture is subjected to reverse tension, the rigid barbs can hook the tissue, allowing the tissue to combine with the flexible barbs outward. The deformation and opening effect of the flexible barbs further increases the tissue holding force and improves the anti-slip ability of the suture. In addition, the space between the flexible barbs and the rigid barbs can accommodate some tissue, allowing the suture and tissue to fuse better, which is conducive to tissue growth and recovery.

[0024] (2) The present invention provides a medical barbed suture that takes into account both tissue puncture damage and anti-slip properties. Its rigid barbs extend outward at an angle, and the rigid barbs and flexible barbs are inclined in the same direction, so that the rigid barbs and flexible barbs can work together to exert tissue gripping force, thereby further improving the anti-slip ability of the suture.

[0025] (3) The present invention provides a medical barbed suture that takes into account both tissue puncture damage and anti-slip properties. The flexible barbs have an inclination angle α of 25° to 45° relative to the longitudinal axis Z of the suture body, and the rigid barbs have an inclination angle β of 45° to 65° relative to the longitudinal axis Z of the suture body. This can better take into account both tissue puncture damage and anti-slip properties, resulting in less tissue puncture damage and stronger tissue gripping force.

[0026] (4) The present invention provides a medical barbed suture that takes into account both tissue puncture damage and anti-slip properties. Its flexible barbs are arc-shaped barbs that bend towards the direction of the rigid barbs, making it easier for the flexible barbs to pass through the tissue and reducing the resistance of the suture to pass through the tissue. The stiffness of the flexible barbs gradually decreases from the root to the free end, making the free end of the flexible barbs softer and improving the deformability of the flexible barbs when the suture is punctured and subjected to reverse tension. This can both reduce puncture damage and open outward to improve the bonding force with the tissue.

[0027] (5) The present invention provides a medical barbed suture that takes into account both tissue puncture damage and anti-slip properties. The size of the flexible barb gradually decreases from the root to the free end, thereby forming a gradual change in the stiffness of the flexible barb. The larger root size can ensure the toughness and strength of the flexible barb when it opens, and prevent the flexible barb from being excessively deformed and damaged when the suture is subjected to reverse tension. The inner and outer sides of the root of the flexible barb have transition arc surfaces with the suture body. The outer side of the flexible barb has an outwardly convex arc surface located between the root and the free end, and the inner side of the flexible barb has an inwardly concave arc surface located between the root and the free end. The transition arc surface and the outwardly convex arc surface on the outer side of the flexible barb can serve as a support surface to open the tissue when puncturing the tissue, ensuring that the suture passes smoothly in the tissue and increasing the feel of suture threading. The transition arc surface and the inwardly concave arc surface on the inner side of the flexible barb can prevent stress concentration in the flexible barb and avoid breakage when the flexible barb opens outward.

[0028] (6) A medical barbed suture of the present invention that takes into account both tissue puncture damage and anti-slip properties, wherein the free end of the flexible barb is a sharp corner or a rounded corner. When a sharp corner is used, the gripping force is stronger, and when a rounded corner is used, the stimulation to the tissue is less.

[0029] (7) The present invention provides a barbed suture that takes into account both tissue puncture damage and anti-slip properties. The barbed units are symmetrically arranged on both sides of the suture body or staggered along the length of the suture body, which makes the processing and manufacturing of the suture more convenient. Moreover, the barbed units on both sides of the suture body can provide a more uniform gripping force, ensuring the structural stability of the suture in the tissue.

[0030] (8) A medical barbed suture of the present invention, which takes into account both tissue puncture damage and anti-slip performance, wherein the ratio of the distance L1 between the tips of the rigid barbs on both sides of the suture body to the same-direction dimension D1 of the suture body is 1.5 to 2.5, and the ratio of the distance L2 between the free ends of the flexible barbs on both sides of the suture body to the distance L1 between the tips of the rigid barbs on both sides of the suture body is 1.5 to 2.5, so that the flexible barbs are larger than the rigid barbs, have better gripping force on the tissue, and improve the stability of tissue suturing and anti-slip performance.

[0031] (9) A medical barbed suture of the present invention takes into account both tissue puncture damage and anti-slip properties. The cross-sectional shape of the suture body is polygonal or circular, which can increase the toughness and bending freedom of the suture and improve the flexibility of suturing operation.

[0032] (10) A medical barbed suture of the present invention takes into account both tissue puncture damage and anti-slip performance. Its barbed unit is cut from a strip plate with a rhomboid cross-section. The cross-sectional shape of the suture body is hexagonal. The thickness of the flexible barb and the rigid barb gradually decreases from the center to the outside, which facilitates the formation of barb tip structure and is easy to process and manufacture. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of a medical barbed suture that combines tissue puncture damage and anti-slip properties according to the present invention.

[0034] Figure 2 This is a schematic diagram of the planar structure of a medical barbed suture that combines tissue puncture damage and anti-slip properties according to the present invention.

[0035] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0036] Figure 4 for Figure 2 A top view of a medical barbed suture;

[0037] Figure 5 This is a schematic diagram showing the stress state of the barbed unit during the insertion of the medical barbed suture into the tissue according to the present invention;

[0038] Figure 6 This is a schematic diagram of the stress state of the barbed unit of the medical barbed suture of the present invention when it is subjected to reverse tension in the tissue.

[0039] Explanation of the labels in the diagram:

[0040] 1. Line body; 2. Barb unit; 2-1. Flexible barb; 2-1a. Free end; 2-1b. Root; 2-1-1. Transition arc surface; 2-1-2. Outwardly convex arc surface; 2-1-3. Inwardly concave arc surface; 2-2. Rigid barb; 2-2a. Tip; 2-3. Accommodation gap. Detailed Implementation

[0041] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0042] [Example]

[0043] Combination Figure 1 and Figure 2As shown, a medical barbed suture that combines tissue puncture damage and anti-slip properties in this embodiment includes a suture body 1 and a plurality of barbed units 2 spaced apart along the length of the suture body 1. The barbed unit 2 includes flexible barbs 2-1 and rigid barbs 2-2. The flexible barbs 2-1 extend obliquely outward from the suture body 1, and the rigid barbs 2-2 also extend outward from the suture body 1. The rigid barbs 2-2 are located on the oblique extension side of the flexible barbs 2-1. The free end 2-1a of the flexible barbs 2-1 extends to the outside of the rigid barbs 2-2. An accommodating gap 2-3 is formed between the flexible barbs 2-1 and the rigid barbs 2-2. It should be noted that the terms "flexible" and "rigid" in the above-mentioned barb unit 2 are relative. The rigidity of the flexible barb 2-1 is lower than that of the rigid barb 2-2. In other words, the flexible barb 2-1 is more flexible than the rigid barb 2-2. Therefore, the softer barb in barb unit 2 is called a "flexible barb," and the harder barb is called a "rigid barb." The flexible barb 2-1 is relatively easier to undergo elastic deformation, while the rigid barb 2-2 is relatively less prone to elastic deformation. Figure 2 As shown, line 1 has a longitudinal axis Z, which can be bent freely. Figure 2 The middle arrow S1 indicates the direction of suture threading, and arrow S2 indicates the direction of the reverse tension on the suture. The medical barbed suture of this embodiment utilizes the synergistic cooperation of flexible barbs 2-1 and rigid barbs 2-2 to solve the problems of insufficient anti-slippage and excessive tissue damage in existing sutures. See details... Figure 5 As shown, when the suture punctures the tissue along the S1 direction, the flexible barb 2-1, under the inward pressure of the tissue, can retract inward, thereby reducing damage to the tissue. Simultaneously, the free end 2-1a of the inwardly retracting flexible barb 2-1 can be limited by the rigid barb 2-2, allowing the flexible barb 2-1 to partially cover the rigid barb 2-2, reducing the scratching of the tissue by the rigid barb 2-2. (Refer to...) Figure 6 As shown, when the suture is subjected to a reverse tension in the S2 direction, the rigid barb 2-2 can hook the tissue, causing the tissue to naturally combine with the flexible barb 2-1 outwards. Utilizing the deformation and opening effect of the flexible barb 2-1, it expands outwards to a certain extent, further increasing the tissue gripping force and improving the suture's anti-slip capability. Furthermore, the accommodating gap 2-3 between the flexible barb 2-1 and the rigid barb 2-2 can accommodate some tissue, allowing the suture and tissue to fuse better, which is beneficial for tissue growth and recovery. Figure 2 As shown, in its natural state, there is a certain gap between the flexible barb 2-1 and the rigid barb 2-2, so that the flexible barb 2-1 and the rigid barb 2-2 do not contact each other. Figure 5 and Figure 6 The direction of the middle arrow indicates the direction of resistance from the tissue to the suture.

[0044] catch Figure 1 and Figure 2 As shown, in this embodiment, the rigid barb 2-2 also extends outward at an angle, and the rigid barb 2-2 and the flexible barb 2-1 have the same direction of inclination, so that the rigid barb 2-2 and the flexible barb 2-1 can work together to exert tissue gripping force, further improving the anti-slipping ability of the suture. Specifically, the inclination angle α of the flexible barb 2-1 relative to the longitudinal axis Z of the suture body 1 is 25° to 45°, and the inclination direction of the flexible barb 2-1 can be determined by the line connecting the front side of its root 2-1b and its free end 2-1a; the inclination angle β of the rigid barb 2-2 relative to the longitudinal axis Z of the suture body 1 is 45° to 65°, and the inclination direction of the rigid barb 2-2 mainly refers to the inclination direction of its inner bevel. By adopting the above-mentioned barb angle design, the angle of the flexible barb 2-1 can be smaller, making it easier to penetrate the tissue, while the angle of the rigid barb 2-2 can be larger, making it easier to grasp the tissue. This design can better balance tissue puncture damage and anti-slip performance, resulting in less tissue puncture damage and stronger tissue gripping force.

[0045] Furthermore, such as Figure 1 and Figure 2As shown, in this embodiment, the flexible barb 2-1 is an arc-shaped barb that bends towards the rigid barb 2-2, making it easier for the flexible barb 2-1 to penetrate the tissue and reducing the resistance of the suture in the tissue. The stiffness of the flexible barb 2-1 gradually decreases from the root 2-1b to the free end 2-1a, making the free end 2-1a more flexible and improving the deformability of the flexible barb 2-1 when the suture punctures the tissue and is subjected to reverse tension. This not only reduces puncture damage but also allows it to open outward to improve the adhesion to the tissue. Specifically, in this embodiment, the size of the flexible barb 2-1 gradually decreases from the root 2-1b to the free end 2-1a, thus creating a gradual change in the stiffness of the flexible barb 2-1. The larger size of the root 2-1b ensures the toughness and strength of the flexible barb 2-1 when it opens, preventing excessive deformation and damage to the flexible barb 2-1 when the suture is subjected to reverse tension. Preferably, the flexible barb 2-1 has a transition arc surface 2-1-1 between the inner and outer sides of the root 2-1b and the line body 1. The transition arc surface 2-1-1 on the outer side of the root 2-1b is concave. The outer side of the flexible barb 2-1 has a convex arc surface 2-1-2 located between the root 2-1b and the free end 2-1a. The transition arc surface 2-1-1 on the outer side of the root 2-1b smoothly transitions with the convex arc surface 2-1-2. The inner side of the flexible barb 2-1 has a concave arc surface 2-1-3 located between the root 2-1b and the free end 2-1a. The transition arc surface 2-1-1 on the inner side of the root 2-1b smoothly transitions with the concave arc surface 2-1-3. The transition arc surface 2-1-1 and the convex arc surface 2-1-2 on the outer side of the flexible barb 2-1 serve as supporting surfaces to open the tissue during puncture, ensuring smooth passage of the suture and improving the feel of suture insertion. The transition arc surface 2-1-1 and the concave arc surface 2-1-3 on the inner side of the flexible barb 2-1 prevent stress concentration and avoid breakage when the flexible barb 2-1 opens outward. The stiffness of the rigid barb 2-2 also gradually decreases from its root to its tip 2-2a. This change in stiffness can also be achieved by changing the size of the rigid barb 2-2; for example, the rigid barb 2-2 can adopt a triangular structure. In this embodiment, the free end 2-1a of the flexible barb 2-1 can be a sharp corner or a rounded corner. A sharp corner provides stronger gripping force, while a rounded corner causes less stimulation to the tissue. Of course, in this embodiment, a rounded free end 2-1a design is preferred, so that the free end 2-1a of the flexible barb 2-1 has a certain width and thickness, and thus the free end 2-1a also has a certain toughness and strength, which can better enable the flexible barb 2-1 to open outward when subjected to reverse tension, and improve the gripping force between it and the tissue.

[0046] Reference Figure 1 and Figure 2As shown in the figure, this embodiment of a medical barbed suture that takes into account both tissue puncture damage and anti-slip properties has barbed units 2 symmetrically arranged on both sides of the suture body 1 or staggered along the length direction of the suture body 1. Figure 1 and Figure 2 The diagram shows a symmetrical barb arrangement. The staggered barb arrangement can be understood as moving the barb unit 2 on one side of the suture body 1 a certain distance, causing the barb units 2 on both sides to be offset from each other. This design, with barbs on both sides of the suture body 1, makes suture fabrication easier and allows the barb units 2 on both sides of the suture body 1 to provide a more even gripping force, ensuring the structural stability of the suture within the tissue. Specifically, refer to... Figure 2 As shown, the ratio of the distance L1 between the tips 2-2a of the rigid barbs 2-2 on both sides of the suture body 1 to the same-direction dimension D1 of the suture body 1 is 1.5 to 2.5. The ratio of the distance L2 between the free ends 2-1a of the flexible barbs 2-1 on both sides of the suture body 1 to the distance L1 between the tips 2-2a of the rigid barbs 2-2 on both sides of the suture body 1 is also 1.5 to 2.5. This makes the flexible barbs 2-1 larger than the rigid barbs 2-2, resulting in better tissue gripping force and improved tissue suture stability and anti-slip performance. The dimension D1 of the suture body 1 can be specifically determined according to the diameter specification of the suture. The barb units 2 can be evenly or unequally distributed on the suture body 1. The spacing T between adjacent barb units 2 on the same side of the suture body 1 is preferably controlled between 1.5 mm and 2.5 mm.

[0047] In this embodiment, the cross-sectional shape of the suture 1 is preferably polygonal or circular, which can increase the toughness and bending freedom of the suture, and improve the flexibility of the suturing operation. (Refer to...) Figure 3 and Figure 4 As shown, specifically in this embodiment, the barb unit 2 is cut from a strip of plate with a rhomboid cross-section, and the resulting suture 1 has a hexagonal cross-section. The barbs are formed by cutting away material, resulting in a stable barb shape. Furthermore, the rhomboid cross-section of the strip of plate and the gradually decreasing thickness of the flexible barbs 2-1 and rigid barbs 2-2 facilitate the formation of barb tip structures and make manufacturing convenient. In specific manufacturing, an existing round wire can first be processed into a strip of plate with a rhomboid cross-section using an embossing device. Then, the pre-formed strip of plate is cut using a cutting device and a mold to form the aforementioned barbed suture. Of course, the medical barbed suture of this embodiment is not limited to the above manufacturing process and can also be manufactured using other feasible existing processes. This medical barbed suture can be made from any suitable surgical material, such as absorbable or non-absorbable polymers.

[0048] Reference Figure 5 and Figure 6As shown in this embodiment, a medical barbed suture that balances tissue puncture damage and anti-slip properties exhibits that, when the suture punctures tissue along the S1 direction, the flexible barbs 2-1 are subjected to... Figure 5 The tissue resistance in the direction of the arrow exerts a squeezing effect on the flexible barb 2-1, causing it to contract inward. This results in the flexible barb 2-1 deforming inward, reducing the overall width of the suture and thus minimizing the wound. As the flexible barb 2-1 contracts inward, its free end 2-1a is blocked by the rigid barb 2-2. At this point, the flexible barb 2-1 covers the rigid barb 2-2, reducing the scratching of the tissue by the harder rigid barb 2-2 and also reducing the resistance to suture threading. After the suture is threaded into place, it is subjected to a reverse pulling force from the wound (in the S2 direction). The rigid barb 2-2 first hooks the tissue, causing the tissue to expand slightly outward. At this time, the flexible barb 2-1 can naturally return to its natural state and combine with the tissue. When the suture is further stretched, under the deformation and opening action of the flexible barb 2-1, the flexible barb 2-1 opens outward under the action of the tissue, further increasing the gripping force between the suture and the tissue and improving the anti-slip ability of the suture. At the same time, the gap between the flexible barb 2-1 and the rigid barb 2-2 increases, and some tissue can enter the accommodating gap 2-3, so that the suture and the tissue can better fuse. The tissue holds the barb unit 2, making the tissue surround the barb and accelerating the healing between tissues.

[0049] This invention discloses a medical barbed suture that balances tissue puncture damage and anti-slip properties. Utilizing the synergistic effect of flexible and rigid barbs, the flexible barbs contract inwards when the suture punctures tissue, reducing tissue damage. Simultaneously, the inward contraction of the flexible barbs partially covers the rigid barbs, minimizing scratches. When the suture is subjected to reverse tension, the rigid barbs hook onto the tissue, causing it to naturally combine with the flexible barbs outwards. The deformation and opening action of the flexible barbs further increases tissue holding force, improving the suture's anti-slip capability. Furthermore, the gap between the flexible and rigid barbs can accommodate some tissue, allowing for better fusion between the suture and tissue, facilitating tissue growth and recovery. This medical barbed suture eliminates the need for knotting, shortening surgical time.

[0050] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A medical barbed suture that combines tissue puncture damage and anti-slip properties, comprising a suture body (1) and a plurality of barbed units (2) spaced apart along the length of the suture body (1), characterized in that: The barb unit (2) includes a flexible barb (2-1) and a rigid barb (2-2). The flexible barb (2-1) extends obliquely outward from the line body (1), and the rigid barb (2-2) also extends outward from the line body (1). The rigid barb (2-2) is located on the oblique extension side of the flexible barb (2-1). The free end (2-1a) of the flexible barb (2-1) extends to the outside of the rigid barb (2-2). A receiving gap (2-3) is formed between the flexible barb (2-1) and the rigid barb (2-2).

2. The medical barbed suture according to claim 1, which combines tissue puncture damage and anti-slip properties, is characterized in that: The rigid barb (2-2) extends outward at an angle, and the rigid barb (2-2) and the flexible barb (2-1) are inclined in the same direction.

3. The medical barbed suture according to claim 2, which combines tissue puncture damage and anti-slip properties, is characterized in that: The inclination angle α of the flexible barb (2-1) relative to the longitudinal axis Z of the line body (1) is 25° to 45°, and the inclination angle β of the rigid barb (2-2) relative to the longitudinal axis Z of the line body (1) is 45° to 65°.

4. The medical barbed suture according to claim 1, which combines tissue puncture damage and anti-slip properties, is characterized in that: The flexible barb (2-1) is an arc-shaped barb that bends toward the rigid barb (2-2), and the stiffness of the flexible barb (2-1) gradually decreases from the root (2-1b) toward the free end (2-1a).

5. The medical barbed suture according to claim 4, which combines tissue puncture damage and anti-slip properties, is characterized in that: The size of the flexible barb (2-1) gradually decreases from the root (2-1b) to the free end (2-1a). The inner and outer sides of the root (2-1b) of the flexible barb (2-1) have a transition arc surface (2-1-1) with the line body (1). The outer side of the flexible barb (2-1) has an outwardly convex arc surface (2-1-2) located between the root (2-1b) and the free end (2-1a). The inner side of the flexible barb (2-1) has an inwardly concave arc surface (2-1-3) located between the root (2-1b) and the free end (2-1a).

6. The medical barbed suture according to claim 5, which combines tissue puncture damage and anti-slip properties, is characterized in that: The free end (2-1a) of the flexible barb (2-1) is a sharp corner or a rounded corner.

7. The medical barbed suture according to any one of claims 1 to 6, which combines tissue puncture damage and anti-slip properties, is characterized in that: The barb units (2) are symmetrically arranged on both sides of the line body (1) or staggered along the length direction of the line body (1).

8. The medical barbed suture according to claim 7, which combines tissue puncture damage and anti-slip properties, is characterized in that: The ratio of the distance L1 between the tips (2-2a) of the rigid barbs (2-2) on both sides of the thread (1) to the same-direction dimension D1 of the thread (1) is 1.5 to 2.5, and the ratio of the distance L2 between the free ends (2-1a) of the flexible barbs (2-1) on both sides of the thread (1) to the distance L1 between the tips (2-2a) of the rigid barbs (2-2) on both sides of the thread (1) is 1.5 to 2.

5.

9. The medical barbed suture according to claim 1, which combines tissue puncture damage and anti-slip properties, is characterized in that: The cross-sectional shape of the line (1) is polygonal or circular.

10. The medical barbed suture according to claim 9, which combines tissue puncture damage and anti-slip properties, is characterized in that: The barbed unit (2) is cut from a strip of plate with a rhomboid cross-section, and the resulting line (1) has a hexagonal cross-section.

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