Medical barbed suture with high stability

Abstract

This utility model discloses a highly stable medical barbed suture, belonging to the field of medical devices. The medical barbed suture of this utility model includes a suture body and a plurality of barbs spaced apart along the length of the suture body. The barbs are cut by removing material. The outer side of each barb has an insertion surface and an outer edge surface sequentially from front to back. The insertion surface extends obliquely outward from the front side of the barb's root to the outer edge surface. The outer edge surface is parallel or approximately parallel to the centerline of the suture body. The inner surface of the barb extends obliquely outward from the rear side of the barb's root, and the outer edge surface intersects with the inner surface to form a barb tip. The barbs of this utility model have a stable shape and good inner support, balancing tissue damage and tissue holding power. Furthermore, the outer edge surface of the barb is parallel or approximately parallel to the centerline of the suture body, allowing for maximum width cutting to form the barbs, reducing raw material waste. Larger barbed sutures can be made from the same diameter round suture, reducing the manufacturing cost of the barbed suture.

Description

Technical Field

[0001] This utility model relates to a medical suture, and more specifically, to a medical barbed suture with high stability. Background Technology

[0002] Medical sutures are mainly used for closing wounds and surgical incisions. To increase the strength of the suture and prevent knotting, many barbed medical sutures have been developed. These barbed sutures have several protruding barbs distributed along their length. Compared with conventional sutures, the barbs allow the suture to pass through the tissue in one direction but prevent it from moving in the opposite direction, providing better anti-slip performance.

[0003] Currently, barbed sutures can be categorized into two main types based on their barb forming process: barbed sutures where barbs are directly cut from the suture material and spread outwards to form barbs, and herringbone barbed sutures where barbs are die-cut from flattened suture material. The former, where barbs spread outwards, lacks internal support, causing them to tend to converge towards the center of the suture, resulting in a smaller barb angle, insufficient tissue grip, and a tendency for the suture to wobble and break. The latter, using a one-piece thermoforming process, such as the "Barbed Suture with Contoured Barbs that Facilitate Tissue Penetration and Increase Retention Strength" disclosed in Chinese Patent Publication No. CN104640508A (publication date: May 20, 2015), offers flexible barb shape design and better barb support. However, its drawback lies in the excessive material removal during cutting, leading to significant raw material waste and higher product costs. In addition, the barbed wire is mainly made by flattening existing diameter round wire and then die-cutting out the barbs. Due to the limitations of the barb structure, more material is removed, which makes it impossible to make larger diameter barbed wire from existing diameter round wire, thus increasing its production cost. Summary of the Invention

[0004] 1. Technical problem to be solved by the utility model

[0005] The purpose of this invention is to overcome the aforementioned shortcomings of existing barbed sutures and provide a medical barbed suture with high stability. Using the technical solution of this invention, the barbs are cut by removing material, resulting in a stable barb shape and good inner support, balancing tissue damage and tissue gripping force. Furthermore, the outer side of the barb consists of an insertion surface and an outer edge surface from front to back. The outer edge surface is parallel or approximately parallel to the center line of the suture body, allowing for maximum width cutting to form the barbs, reducing raw material waste. Round sutures of the same diameter can be used to produce barbed sutures with larger thread sizes, thus reducing the manufacturing cost of the barbed suture.

[0006] 2. Technical Solution

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] This invention relates to a highly stable medical barbed suture, comprising a suture body and a plurality of barbs spaced apart along the length of the suture body. The barbs are cut by removing material. The outer side of each barb has a guide surface and an outer edge surface from front to back. The guide surface extends obliquely from the front side of the barb root to the outer edge surface. The outer edge surface is parallel or approximately parallel to the center line of the suture body. The inner side of each barb extends obliquely from the rear side of the barb root to the outer edge surface, and the outer edge surface intersects with the inner side surface to form a barb tip.

[0009] Furthermore, the spike is a sharp angle or has a rounded corner, and the rounded corner of the spike is 0.02 to 0.05 mm.

[0010] Furthermore, the threading surface is a plane or an arc surface, and there is a fillet r2 between the threading surface and the wire body, where r2 is 0.2 to 1.2 mm; there is a fillet r3 between the threading surface and the outer edge surface, where r3 is 0.2 to 1.2 mm; the inner surface is a plane or an arc surface, and there is a fillet r1 between the inner surface and the wire body, where r1 is 0.02 to 0.05 mm.

[0011] Furthermore, both the threading surface and the inner surface are planar, the inclination angle α of the inner surface is 40° to 60°, and the inclination angle β of the threading surface is 40° to 60°.

[0012] Furthermore, the threading surface and the inner surface are parallel or substantially parallel to each other.

[0013] Furthermore, the cross-sectional shape of the line is circular.

[0014] Furthermore, the barbs are symmetrically arranged on both sides of the line or staggered along the length of the line.

[0015] Furthermore, the ratio of the distance L1 between the outer edges of the barbs on both sides of the line to the same-direction dimension L0 of the line is 2.5 to 3.5.

[0016] Furthermore, the barbs are distributed at equal or unequal intervals on the line, and the spacing P between adjacent barbs on the same side of the line is 1.5 to 2.5 mm.

[0017] Furthermore, the barbs are flat and the thickness of the barbs is less than the thickness of the thread, with the thickness d of the barbs being 0.1 to 0.2 mm.

[0018] 3. Beneficial effects

[0019] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0020] (1) A medical barbed suture with high stability according to the present invention includes a suture body and a plurality of barbs spaced apart along the length of the suture body. The barbs are cut by removing material. The outer side of the barb has a threading surface and an outer edge surface from front to back. The threading surface extends from the front side of the root of the barb outward to the outer edge surface. The outer edge surface is parallel or approximately parallel to the center line of the suture body. The inner side of the barb extends from the back side of the root of the barb outward. The outer edge surface and the inner side surface intersect to form a barb tip. The barb shape formed by cutting is stable and has good inner support, taking into account both tissue damage and tissue gripping force. In addition, the outer edge surface of the barb is the outer contour of the suture material being cut, which can cut the barb with the maximum width, reducing the loss of raw materials. The same diameter of round suture can be used to make barbed sutures with larger wire sizes, reducing the production cost of barbed sutures.

[0021] (2) A medical barbed suture with strong stability of the present invention has a barb tip that is either sharp or rounded. When the barb tip is sharp, the gripping force is stronger, and when the barb tip is rounded, the tissue irritation is less.

[0022] (3) The present invention provides a medical barbed suture with strong stability, wherein the insertion surface is a plane or an arc surface, the inner surface is a plane or an arc surface, and the insertion surface and the suture body and the outer edge are all rounded to make tissue puncture smoother; the inner surface and the suture body are also rounded to reduce the stress at the barb root and prevent the barb from tearing under force.

[0023] (4) The present invention provides a medical barbed suture with strong stability, wherein the insertion surface and the inner surface are both planar, the inclination angle α of the inner surface is 40° to 60°, and the inclination angle β of the insertion surface is 40° to 60°, which increases the angle of the barb and further improves the gripping force of the barb on the tissue.

[0024] (5) The present invention provides a medical barbed suture with strong stability, wherein the insertion surface and the inner surface are parallel or approximately parallel to each other, so that the barb is approximately parallelogram-shaped, which is simple in structure, easy to form, and has higher structural strength and is not easily deformed or failed.

[0025] (6) A medical barbed suture with strong stability of this utility model has a circular cross-sectional shape, which increases the toughness and bending freedom of the suture, while ensuring that the wound through the tissue is minimized.

[0026] (7) A medical barbed suture with strong stability of the present invention has barbs symmetrically arranged on both sides of the suture body or staggered along the length of the suture body. The ratio of the distance L1 between the outer edges of the barbs on both sides of the suture body to the same-direction dimension L0 of the suture body is 2.5 to 3.5, which makes the barb size larger, the gripping force on the tissue better, and the tissue suturing stability improved, and can reduce or eliminate knotting.

[0027] (8) The present invention provides a medical barbed suture with strong stability, wherein the barbs are flat and the thickness of the barbs is less than the thickness of the suture body. The thickness d of the barbs is 0.1 to 0.2 mm, which minimizes damage to the tissue while ensuring tissue gripping force. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a highly stable medical barbed suture according to the present invention.

[0029] Figure 2 This is a schematic diagram of the planar structure of a highly stable medical barbed suture according to the present invention;

[0030] Figure 3 This is a schematic diagram of the end face structure of a highly stable medical barbed suture according to the present invention;

[0031] Figure 4 This is a schematic diagram illustrating the barb cutting and forming process of a highly stable medical barbed suture according to this utility model.

[0032] Explanation of the labels in the diagram:

[0033] 1. Thread body; 2. Barb; 2a. Threading surface; 2b. Outer edge surface; 2c. Barb tip; 2d. Inner surface; 3. Embossed flat thread; 3-1. Thread core; 3-2. Wing plate; 3-3. Waste material. Detailed Implementation

[0034] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0035] [Example]

[0036] Combination Figure 1 and Figure 2As shown, this embodiment of a highly stable medical barbed suture includes a suture body 1 and a plurality of barbs 2 spaced apart along the length of the suture body 1. The barbs 2 are cut by removing material, resulting in a stable barb shape and good inner support. The outer side of the barb 2 has a penetration surface 2a and an outer edge surface 2b from front to back. The penetration surface 2a extends obliquely from the front side of the root of the barb 2 to the outer edge surface 2b, enabling unidirectional penetration into the tissue. The outer edge surface 2b is parallel or approximately parallel to the center line of the suture body 1, and the outer contour of the cut suture material can be used as the outer edge surface 2b to achieve the maximum width for cutting and forming the barb. The inner surface 2d of the barb 2 extends obliquely from the rear side of the root of the barb 2, and the outer edge surface 2b intersects with the inner surface 2d to form a spiky tip 2c, ensuring minimal tissue damage and maximum tissue gripping force. Compared with existing barbed sutures, the above-mentioned medical barbed sutures reduce the consumption of raw materials, and the same diameter round thread can be used to make barbed sutures with larger thread sizes, thus reducing the manufacturing cost of barbed sutures.

[0037] In this embodiment, the aforementioned needle tip 2c is either pointed or rounded. A pointed tip provides stronger gripping force, while a rounded tip causes less tissue irritation. The rounded corner of the needle tip 2c is preferably 0.02–0.05 mm.

[0038] Furthermore, the aforementioned threading surface 2a is either flat or curved, and there is a rounded corner r2 between the threading surface 2a and the suture body 1, preferably r2 being 0.2–1.2 mm; there is also a rounded corner r3 between the threading surface 2a and the outer edge surface 2b, preferably r3 being 0.2–1.2 mm. This rounded transition makes the suture puncture the tissue more smoothly. The inner surface 2d is also flat or curved, and there is a rounded corner r1 between the inner surface 2d and the suture body 1, preferably r1 being 0.02–0.05 mm, which reduces stress at the barb root and prevents the barb from tearing under stress.

[0039] Specifically, in this embodiment, both the threading surface 2a and the inner surface 2d are preferably planar, wherein the included angle α of the inner surface 2d is 40° to 60°, and the included angle β of the threading surface 2a is 40° to 60°, increasing the angle of the barb 2 and further improving the gripping force of the barb 2 on the tissue. More preferably, the threading surface 2a and the inner surface 2d are parallel or approximately parallel to each other, making the barb 2 approximately parallelogram-shaped, which has a simple structure, is easy to form, and has higher structural strength, making it less prone to deformation and failure.

[0040] like Figure 1 and Figure 3As shown, the cross-sectional shape of the aforementioned suture 1 is preferably circular. The circular shape of the suture 1 increases the toughness and bending freedom of the suture, while ensuring that the wound opening through the tissue is minimized. It should be understood that, due to the relatively soft material of the suture 1, it is impossible to guarantee that the cross-sectional shape of the suture 1 is a perfect circle during the manufacturing process. Therefore, the cross-sectional shape of the aforementioned suture 1 should be understood as approximately circular.

[0041] This embodiment provides a highly stable medical barbed suture, wherein the barbs 2 are symmetrically arranged on both sides of the suture body 1 or staggered along the length of the suture body 1. Figure 1 and Figure 2 The diagram shows a symmetrical barb arrangement. An interlaced barb arrangement can be understood as moving one barb 2 on one side of line 1 a certain distance, causing the barbs 2 on both sides to be staggered. (Refer to...) Figure 2 As shown, in this embodiment, the ratio of the distance L1 between the outer edges 2b of the barbs 2 on both sides of the suture 1 to the same-direction dimension L0 of the suture 1 is 2.5 to 3.5. This results in larger barb sizes, better tissue gripping force, improved tissue suture stability, and reduced or eliminated knotting. The barbs 2 can be evenly or unequally distributed on the suture 1, and the spacing P between adjacent barbs 2 on the same side of the suture 1 is preferably controlled between 1.5 and 2.5 mm. Furthermore, the barbs 2 are preferably flat, and their thickness is less than that of the suture 1. The thickness d of the barbs 2 is preferably 0.1 to 0.2 mm, minimizing tissue damage while ensuring tissue gripping force.

[0042] Figure 4 This illustrates the barb cutting and forming process of the medical barb suture according to this embodiment. (Refer to...) Figure 4 As shown, in the manufacturing process of the medical barbed suture in this embodiment, the existing round thread is first processed into an embossed flat thread 3 using an embossing device. The embossed flat thread 3 has a core 3-1 and wing plates 3-2 located on both sides of the core 3-1. The core 3-1 is roughly circular in shape, and the overall cross-section of the embossed flat thread 3 is shown in the S-direction projection in the figure. Then, the pre-formed embossed flat thread 3 is cut into a medical barbed suture using a cutting device and a mold. Since the outer edge surface 2b of the barbed thread is parallel or roughly parallel to the center line of the thread body 1, the width of the embossed flat thread 3 (the distance between the outer edges of the wing plates 3-2 on both sides) can be used as the distance L1 between the outer edge surfaces 2b of the barbs 2 on both sides of the thread body 1. During cutting, only the "dashed lines" in the embossed flat thread 3 need to be cut. At this time, the cutting waste 3-3 is minimized, and the size of the barbs 2 is maximized, thereby reducing the loss of raw materials. The same diameter round thread can be used to make barbed threads with larger thread sizes, reducing the manufacturing cost of the barbed suture.

[0043] This invention discloses a highly stable medical barbed suture. The barbs are cut by removing material, resulting in a stable barb shape and good inner support, balancing tissue damage and tissue gripping force. Furthermore, the outer side of the barb consists of an insertion surface and an outer edge surface from front to back. The outer edge surface is parallel or approximately parallel to the center line of the suture body, allowing for the cutting of the barb to the maximum width, reducing raw material waste. The same diameter round suture can be used to make barbed sutures with larger thread sizes, thus reducing the manufacturing cost of the barbed suture.

[0044] 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 highly stable medical barbed suture, comprising a suture body (1) and a plurality of barbs (2) spaced apart along the length of the suture body (1), characterized in that: The barb (2) is cut by removing material. The outer side of the barb (2) has a through-face (2a) and an outer edge face (2b) from front to back. The through-face (2a) extends obliquely from the front side of the root of the barb (2) to the outer edge face (2b). The outer edge face (2b) is parallel or approximately parallel to the center line of the line body (1). The inner side face (2d) of the barb (2) extends obliquely from the rear side of the root of the barb (2) to the outside. The outer edge face (2b) and the inner side face (2d) intersect to form the barb tip (2c).

2. The medical barbed suture with high stability according to claim 1, characterized in that: The spike (2c) is a sharp corner or has a rounded corner, and the rounded corner of the spike (2c) is 0.02 to 0.05 mm.

3. The medical barbed suture with high stability according to claim 1, characterized in that: The threading surface (2a) is a plane or an arc surface, and there is a fillet r2 between the threading surface (2a) and the line body (1), where r2 is 0.2 to 1.2 mm; there is a fillet r3 between the threading surface (2a) and the outer edge surface (2b), where r3 is 0.2 to 1.2 mm; the inner surface (2d) is a plane or an arc surface, and there is a fillet r1 between the inner surface (2d) and the line body (1), where r1 is 0.02 to 0.05 mm.

4. The medical barbed suture with high stability according to claim 1, characterized in that: Both the threading surface (2a) and the inner surface (2d) are planes. The included angle α of the inner surface (2d) is 40° to 60°, and the included angle β of the threading surface (2a) is 40° to 60°.

5. The medical barbed suture with high stability according to claim 4, characterized in that: The threading surface (2a) and the inner surface (2d) are parallel or approximately parallel to each other.

6. The medical barbed suture with high stability according to claim 1, characterized in that: The cross-sectional shape of the line (1) is circular.

7. The highly stable medical barbed suture according to any one of claims 1 to 6, characterized in that: The barbs (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 with high stability according to claim 7, characterized in that: The ratio of the distance L1 between the outer edges (2b) of the barbs (2) on both sides of the line (1) to the same-direction dimension L0 of the line (1) is 2.5 to 3.

5.

9. The medical barbed suture with high stability according to claim 7, characterized in that: The barbs (2) are distributed at equal or unequal intervals on the line (1), and the distance P between adjacent barbs (2) on the same side of the line (1) is 1.5 to 2.5 mm.

10. The highly stable medical barbed suture according to claim 7, characterized in that: The barb (2) has a flat structure and the thickness of the barb (2) is less than the thickness of the line (1). The thickness d of the barb (2) is 0.1 to 0.2 mm.

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