CN209644983U - A medical suture and a medical device - Google Patents

Abstract

The utility model discloses a medical suture thread and a medical device. A medical suture includes a flexible filament having a first end and a second end, and a plurality of multi-clawed barbs protruding from the flexible filament. By adopting the medical suture thread and the medical device of the utility model, the acting force of the thread body on the tissue can be enhanced, and the holding strength can be improved.

Description

A medical suture and a medical device

technical field

The utility model relates to the field of surgery and medical cosmetology, in particular to a medical suture thread used for tissue suturing, wound closure or tissue lifting and fixing and a medical device.

Background technique

Medical sutures are a class of medical devices commonly used in surgical operations to close wounds, bind and fix tissues. In recent years, a barbed medical suture has appeared on the market. The barbs of the medical suture hook the tissue surrounding the barbs, allowing the suture to pass through the tissue in one direction but preventing it from moving in the opposite direction, thereby providing a non-slip property of the thread. Therefore, this type of barbed medical suture does not need to be knotted like traditional medical sutures when used. In addition, this type of medical suture pulls the tissue through the grip of the barb, which can achieve the purpose of lifting the tissue, so it is also widely used in medical cosmetic fields such as eyebrow lifting, facial firming, buttock lifting, and breast plastic surgery.

This type of barbed medical suture is currently mainly realized in two ways. The first is to implement barbs by adding a stop to the medical suture. Chinese patent CN 101500495 B discloses a suture thread with a conical tissue engaging element. These tissue engaging elements are suspended from preformed nodules on the thread body at predetermined intervals. Chinese patent CN 102869818 B discloses a method of heating and extruding suture raw materials under specific temperature and pressure conditions by a hot-pressing solid-phase forming method to prepare a suture with microteeth on the surface. This type of medical suture may cause greater damage and pain when inserted into the tissue due to the overall increase in the cross-sectional area of the medical suture.

The second is to cut barbs on the structure of the original medical suture. Chinese patent CN 1925795 B discloses the structure of such barbs and their distribution on the wire body. The Chinese patent CN 1322840 C discloses the cutting method of the above-mentioned barbs. The advantage of this type of barb is that only when the medical suture is pulled in the opposite direction of insertion, the barbs will open, grab the tissue and prevent the thread from slipping back. The "grip" of the barb to the tissue is related to its cutting depth, because the deeper the cutting depth, the larger the area of action of the barb on the tissue along the direction perpendicular to the insertion of the medical suture, and the greater the holding strength obtained. However, excessively increasing the cutting depth may cause the thread body of the cutting part to be too thin, thereby reducing the tensile strength of the medical suture thread, thus causing the thread body to be easily torn when pulled.

Utility model content

The technical problem to be solved by the utility model is to provide a medical suture and a medical device, which can enhance the force of the thread body on the tissue and improve the holding strength.

In order to solve the above technical problems, the utility model provides a medical suture, comprising: a flexible filament with a first end and a second end, and a plurality of multi-claw barbs protruding from the flexible filament, wherein, The opening directions of the multiple multi-claw barbs on the flexible filament are all towards the first end or towards the second end; or, the multi-claw barbs with openings towards the first end are arranged on Near the second end, the multi-claw barb opening towards the second end is disposed near the first end, so that the flexible filament can separate from the first end and the second end. Suture the tissue.

Preferably, said multi-claw barb is formed by forming at least one protrusion for holding tissue on said single-claw barb on said flexible filament.

Preferably, the multi-claw barb is configured to cut again on the tip and/or both sides of the single-claw barb cut on the flexible filament to form a double-claw hoof, three-claw hoof or palmate leaf type structure; or the multi-claw barb is set to be cut again on the outer side of the single-claw barb cut on the flexible filament to form a y-shaped bifurcated structure.

Preferably, the multi-claw barbs located on the same cross section of the flexible filament are at 180°, 120° or 60° to each other.

Preferably, a plurality of said multi-claw barbs are helically arranged on said flexible filament.

Preferably, the multi-claw barb is formed by one or more methods of mechanical cutting, laser cutting, injection molding or stamping.

Preferably, the flexible filament is made of collagen, polydioxanone, polylactic acid, polyglycolic acid, polylactide, natural silk, metal, metal alloy, polypropylene, polyester, polyamide made of one; or a copolymer of at least two of polydioxanone, polylactic acid, polyglycolic acid and polylactide; or made of polypropylene, polyester, polyamide At least two formed copolymers or blends are made.

Preferably, the cross-sectional shape of the flexible filament is a circle, an ellipse, a triangle, a rhombus, a square, a rectangle, a trapezoid or a polygon.

The utility model also discloses a medical device, which includes a suture needle, an injection needle or a guide needle, and also includes the above-mentioned medical suture, the first end and/or the second end of the medical suture are connected to the suture needle connection; the medical suture is set in the injection needle; the medical suture is set in the guide needle.

Compared with the prior art, the beneficial effect of the medical suture and the medical device of the present utility model lies in that: since the multi-claw barb has multiple protrusions, the interaction area between the medical suture and the tissue is increased, and a greater holding capacity can be obtained. strength.

Description of drawings

Fig. 1 is the structural representation of the medical suture thread of the first embodiment of the utility model;

Fig. 2 is a sectional view of Fig. 1;

Fig. 3 is the structural representation of the medical suture thread of the second embodiment of the present utility model;

Fig. 4 is the structural representation of the medical suture thread of the 3rd embodiment of the utility model;

Fig. 5 is a sectional view of Fig. 4;

Fig. 6 is a schematic structural view of a medical suture according to a fourth embodiment of the present invention;

Fig. 7 is a sectional view of Fig. 6;

Fig. 8 is a schematic diagram of a two-dimensional structure of the multi-claw barb of Fig. 1;

Fig. 9 is a schematic diagram of the cutting method of the multi-claw barb shown in Fig. 8;

Fig. 10 is a schematic diagram of cutting out the multi-claw barb shown in Fig. 8 by using a combined cutter;

Fig. 11 is a schematic structural view of a medical suture according to a fifth embodiment of the present invention;

Fig. 12 is a schematic structural view of a medical suture according to a sixth embodiment of the present invention;

Fig. 13 is a schematic structural view of a medical suture in a seventh embodiment of the present invention;

Fig. 14 is a schematic structural view of a medical suture in the eighth embodiment of the present invention;

Fig. 15 is a schematic structural view of a medical suture according to a ninth embodiment of the present invention.

Explanation of reference numerals: 1-flexible filament; 2-multi-claw barb; 3-first end; 4-second end; 5-combined cutter; 6-protrusion.

Detailed ways

The medical suture and the medical device of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

1-15, the utility model discloses a medical suture, which includes: a flexible filament 1 with a first end 3 and a second end, and a plurality of multi-claw barbs protruding from the flexible filament 1 2 (refer to Figure 8, Figure 11-Figure 15). Wherein, the difference between the multi-claw barb 2 and the single-claw barb commonly used in the prior art is that the multi-claw barb 2 has a plurality of protrusions 6 , while the single-claw barb has one protrusion 6 . The multi-claw barb 2 of the present utility model has the size of the protrusion 6 and the angle relative to the flexible filament 1. The sharpness of the tip of the protrusion 6 is not limited. It can have a certain radian or have a sharp angle. In addition, the flexible length The opening directions of the multiple multi-claw barbs 2 on the silk 1 are the same, so that due to the "grasping force" of the multi-claw barbs 2 on the tissue, the medical suture can be prevented from moving toward the opening direction of the multi-claw barbs 2 in the tissue That is, the medical suture thread can easily pass through the tissue along the direction opposite to the opening direction of the multi-claw barb 2 , and then moving along the opening direction of the multi-claw barb 2 will encounter great resistance. Wherein, the distribution of the multiple multi-claw barbs 2 on the flexible filament 1 is not limited, and may be symmetrical or asymmetrical. In addition, the medical suture may include multiple single-claw barbs in addition to multiple multi-claw barbs 2 , and multiple single-claw barbs and multiple multiple-claw barbs 2 may be alternately distributed on the flexible filament 1 .

In the medical suture disclosed by the utility model, since the multi-claw barb 2 has a plurality of protrusions 6, the interaction area between the medical suture and the tissue is increased, and greater holding strength can be obtained.

In one embodiment, the multi-claw barb 2 is formed by forming at least one protrusion 6 for holding tissue on the single-claw barb on the flexible filament 1, since the multi-claw barb 2 is formed on the single-claw barb Formed on the basis of , so that there is no need to increase the depth of the single claw barb on the flexible filament 1, so that the flexible filament 1 of the medical suture will not be too thin, so that it can be used without increasing the tensile strength of the medical suture. , Increase the area of action between the medical suture and the tissue, so that greater holding strength can be obtained. In addition, the multi-claw barb 2 can also be formed in other ways, not limited to being formed only by processing on the basis of the single-claw barb.

Among them, the multi-claw barb 2 can be formed by one or more methods of mechanical cutting, laser cutting, injection molding or stamping. Specifically, the multi-claw barb 2 can be integrated by combining cutters, lasers or models. forming, or forming the multi-jaw barb 2 by multiple cutting, injection molding, stamping or their combination.

Specifically, as shown in Figure 9, the cross-section of the flexible filament 1 is circular, first cut on the flexible filament 1 along the solid line in the figure, the knife tip of the cutter faces the central axis of the flexible filament 1, and then cut along the solid line in the figure. The middle dotted line cuts out the barb to form a multi-claw barb 2 with a double-claw hoof structure. In addition, it can also be realized by means of combined cutter 5 (refer to FIG. 10 ) or combined laser. Wherein, the combination cutter 5 has two blade portions perpendicular to each other.

In one embodiment, the multi-claw barb 2 is configured to cut again at the tip and/or both sides of the single-claw barb cut on the flexible filament 1 to form a double-claw hoof shape (refer to FIGS. Figure 4, Figure 5, Figure 6, Figure 7 or Figure 8), three-claw hoof type (refer to Figure 11) or palm leaf structure (refer to Figure 12 or Figure 13), wherein the single-claw barb can be cut Either make one cut or make multiple cuts. Referring to FIG. 8 , the formed double-claw hoof structure includes two protrusions 6 , and the two protrusions 6 are generally in an "M" shape.

Referring to FIG. 11 , the formed three-claw hoof structure includes three protrusions 6 arranged side by side, and the lengths of the three protrusions 6 may be the same or different. Among them, the method of forming the multi-claw barb 2 with a three-claw hoof structure may specifically be to first cut two knives along the V shape on the outer surface of the flexible filament 1, and the center line of the V shape is parallel to the flexible filament. 1, and then cut barbs along the V-shaped intersection toward the opening. The above steps can also be realized by combining cutters or combining lasers.

Referring to Fig. 12 and Fig. 13, the formed palm-shaped leaf structure may include symmetrical palm-shaped leaf structure and asymmetric palm-shaped leaf structure, and the multi-claw barbs 2 of the palm-shaped leaf structure are similar to palm-shaped leaves. Wherein, the method of forming the multi-claw barb 2 of the palm-shaped leaf-shaped structure may specifically be formed by cutting the edge of the single-claw barb or cutting off part of the structure.

Due to the tension of the flexible filament 1, when the single-claw barb is cut again, the cut parts are separated from each other, so that the original single-claw barb has more spikes or serrations, that is, a plurality of protrusions are formed. 6. The formed protrusion 6 can enable the multi-claw barb 2 to grasp a wider range of surrounding tissues as a whole, which improves the ability of the multi-claw barb 2 to anchor tissue, and improves the holding strength of the pulled tissue.

In another embodiment, referring to FIG. 15 , the multi-claw barb 2 is configured to cut again on the outer surface of the single-claw barb cut out on the flexible filament 1 to form a y-shaped bifurcation structure, from which the multi-claw barb Viewed from the side of 2, the multi-claw barb 2 is in a "y" shape as a whole. Wherein, the method of forming the multi-claw barb 2 with a y-shaped bifurcation structure may specifically be formed by cutting a second single-claw barb on the first single-claw barb.

In one embodiment, referring to FIG. 2 , the arrangement of multiple multi-claw barbs 2 on the flexible filament 1 can be such that the multi-claw barbs 2 on the same section of the flexible filament 1 are 180° apart from each other. , 120° or 60°, etc.

In another embodiment, referring to FIGS. 4-7 , a plurality of multi-claw barbs 2 are arranged in a helical shape on the flexible filament 1 . Further, viewed along the axial direction of the flexible filament 1 , the multiple multi-claw barbs 2 on the flexible filament 1 are 180°, 120° or 60° away from each other.

The opening directions of the multi-claw barbs 2 on the medical suture can all face the first end 3 , or all face the second end 4 . In addition, because medical sutures may need to be sutured from both ends, in one embodiment, referring to FIG. The multi-claw barb 2 at the end 4 is disposed close to the first end 3, so that the tissue can be sutured from the first end 3 and the second end 4 respectively.

In the above embodiments, the flexible filament 1 can be made of absorbable material or non-absorbable material. For example, the flexible filament 1 can be made of one of absorbable materials such as collagen, polydioxanone, polylactic acid, polyglycolic acid, polylactide; or made of polydioxanone , polylactic acid, polyglycolic acid and polylactide and other absorbable materials such as at least two copolymers formed; in addition, the flexible filament 1 can also be made of natural silk, metal, metal alloy, polypropylene, polyester , polyamide and other non-absorbable materials; or a copolymer or blend of at least two non-absorbable materials such as polypropylene, polyester and polyamide. The cross-sectional shape of the flexible filament 1 can be circular, elliptical, triangular, rhombus, square, rectangular, trapezoidal or polygonal.

The utility model also discloses a medical device (not shown in the figure), which includes a suture needle, an injection needle or a guide needle, and also includes the above-mentioned medical suture, the first end 3 and/or the first end 3 of the medical suture The two ends 4 are connected with the suture needle for surgical suture; the medical suture is set on the injection needle for lifting and tightening the skin in medical cosmetic surgery; the medical suture is set in the guide needle for lifting and firming in medical cosmetic surgery skin.

The above embodiments are only exemplary embodiments of the utility model, and are not used to limit the utility model, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the utility model within the spirit and protection scope of the utility model, and such modifications or equivalent replacements should also be deemed to fall within the protection scope of the utility model.

Claims (9)

1. A medical suture, comprising: a flexible filament having a first end and a second end, and a plurality of multi-claw barbs protruding from the flexible filament, wherein the flexible filament The opening directions of the plurality of multi-claw barbs are all toward the first end or toward the second end; or, the multi-claw barbs with openings toward the first end are arranged near the second end. end, the multi-claw barb opening toward the second end is disposed adjacent to the first end so that the flexible filament can suture tissue from the first end and the second end, respectively. 2. The medical suture according to claim 1, wherein the multi-claw barb is formed by forming at least one protrusion for holding tissue on the single-claw barb on the flexible filament. 3. The medical suture according to claim 1 or 2, wherein the multi-claw barb is set to be cut on the flexible filament at the tip and/or both sides of the single-claw barb again. cutting to form a double-claw hoof, three-claw hoof or palmate leaf-shaped structure; or the multi-claw barb is arranged to be cut again on the outer side of the single-claw barb cut on the flexible filament to form Y-shaped bifurcation structure. 4 . The medical suture according to claim 1 , wherein the multi-claw barbs located on the same section of the flexible filament are at 180°, 120° or 60° to each other. 5. The medical suture according to claim 1, characterized in that, a plurality of the multi-claw barbs are arranged in a spiral shape on the flexible filament. 6 . The medical suture according to claim 1 , wherein the multi-claw barb is formed by one or more methods of mechanical cutting, laser cutting, injection molding or stamping. 7. The medical suture according to claim 1, wherein the flexible filament is made of collagen, polydioxanone, polylactic acid, polyglycolic acid, polylactide, natural silk, metal , metal alloy, polypropylene, polyester, polyamide made of one. 8. The medical suture according to claim 1, wherein the cross-sectional shape of the flexible filament is circular, elliptical, triangular, rhombus, square, rectangular, trapezoidal or polygonal. 9. A medical device, characterized in that it comprises a suture needle, an injection needle or a guide needle, wherein it also comprises the medical suture according to any one of claims 1-8, the first of the medical suture The first end and/or the second end are connected with the suture needle; the medical suture is set in the injection needle; the medical suture is set in the guide needle.